JP2018000865A - Radiation therapy apparatus and operation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiotherapy apparatus capable of performing a highly accurate setup through three-dimensional information without exposing a patient. A radiation therapy apparatus 10 has a radiation irradiation unit 101 that irradiates a patient, a rotation support unit 102 that supports the radiation irradiation unit 101 and rotates the radiation irradiation unit 101 around the patient, and a radiation irradiation unit. It includes a 3D scanner unit 103 that is attached to the 101 or rotation support unit 102, is rotated around the patient, and irradiates the patient with sensor light. [Selection diagram] Fig. 3

Description

  The present invention relates to a radiation therapy apparatus and an operating method thereof.

Currently, radiotherapy is generally required to be set up for each irradiation of radiation. The “setup” is an operation for matching the posture of the patient to sleep during external irradiation (a method of applying radiation from the outside) at the time of each irradiation.
In relation to this technical field, Patent Document 1 discloses a computerized (spatial and temporal) multidimensional image analysis, a change (structure) in a three-dimensional scan (such as a CT scanner) using a continuous image of a human body part. Concepts that apply to automatic quantification (automatic or functional), foreign object location detection, providing consistent diagnosis, etc.

Special table 2009-522005 gazette

If there is an error in the above-described setup operation, radiation is irradiated to a site different from the intended location. However, in many cases, radiation treatment is performed in 30-40 times, but it is necessary to perform setup for each patient every time.
Conventionally, the presence / absence of misalignment has been determined based on comparison between three-dimensional data of a CT scanner or comparison between X-ray images (two-dimensional images). However, when comparing three-dimensional data by a CT scanner, there is a problem of exposure by X-rays. Further, when X-ray images (two-dimensional images) are compared with each other, there is a problem of exposure by X-rays and a problem of comparison accuracy (because the amount of information is smaller than that of three-dimensional information).

  In view of the above problems, an object of the present invention is to provide a radiotherapy apparatus capable of performing a highly accurate setup through three-dimensional information without exposing a patient, and an operating method thereof.

  A radiation therapy apparatus according to a first aspect includes a radiation irradiation unit that irradiates a patient with radiation, a rotation support unit that supports the radiation irradiation unit and rotates the radiation irradiation unit around the patient, and the radiation irradiation unit. Or a 3D scanner unit that is attached to the rotation support unit and rotated around the patient to emit sensor light toward the patient.

  In this aspect, since the 3D scanner unit can be rotated around the patient using the rotation drive by the rotation support unit, highly accurate three-dimensional measurement can be performed while the configuration of the 3D scanner itself is extremely simple. it can.

  The radiotherapy apparatus according to the second aspect is the radiotherapy apparatus according to the first aspect, further comprising a determination unit that determines a positional shift of the patient based on the three-dimensional data of the patient acquired by the 3D scanner unit. .

  In this aspect, it is possible to correct the deviation when a positional deviation occurs in the patient.

  The radiotherapy apparatus according to the third aspect is the radiotherapy apparatus according to the first aspect, further including a determination unit that performs determination based on the patient authentication based on the three-dimensional data of the patient acquired by the 3D scanner unit. .

  In this aspect, it is possible to perform re-setup when a patient difference or a patient data difference occurs.

  The radiation therapy apparatus according to the fourth aspect is the radiation therapy apparatus according to any one of the first to third aspects in which the 3D scanner unit rotates together with the radiation irradiation unit.

  In this aspect, since the 3D scanner unit can be rotated by the same rotation axis as that of the radiation irradiation unit, 3D data along the rotation trajectory of the radiation irradiation unit can be detected.

  The operation method of the radiotherapy apparatus of the fifth aspect is the sensor light from the 3D scanner unit toward the patient while rotating the rotation support unit and rotating the 3D scanner unit around the patient. It is the operating method of the radiotherapy apparatus in any one of the 1st to 4th aspect which implements the scanning step which irradiates.

  In this aspect, since the 3D scanner unit can be rotated around the patient using the rotation drive by the rotation support unit, highly accurate three-dimensional measurement is performed while the configuration of the 3D scanner itself is extremely simple. Can do.

  According to the radiotherapy apparatus and the operating method thereof of the present invention, it is possible to perform setup with high accuracy through three-dimensional information without exposing a patient.

It is a top view which shows the structure of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a side view which shows the structure of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a perspective view which shows the structure of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a side view which shows the principal part of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a figure explaining operation | movement of the principal part of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a figure explaining the comparison process of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a flowchart of the operating method of the radiotherapy apparatus which concerns on 1st embodiment of this invention. It is a perspective view which shows the structure of the radiotherapy apparatus which concerns on 2nd embodiment of this invention.

  Hereinafter, various embodiments according to the present invention will be described with reference to the drawings.

"First embodiment"
1st Embodiment of the radiotherapy apparatus which concerns on this invention is described with reference to FIGS.

As shown in FIGS. 1 to 3, the radiotherapy apparatus 10 includes a fixing unit 100, a radiation irradiation unit 101, a rotation support unit 102, a 3D scanner unit 103, and a bed 2.
The fixing part 100 is fixed to the floor surface FL of the radiotherapy room. The fixing unit 100 fixed to the floor surface FL supports the radiation irradiation unit 101, the rotation support unit 102, and the 3D scanner unit 103.
The radiation irradiation unit 101 emits radiation for treatment toward the patient fixed to the bed 2.

As shown in FIG. 2, the rotation support part 102 includes a shaft part 102a, a rotation part 102b, and an arm part 102c. In the present embodiment, the shaft portion 102a, the rotating portion 102b, and the arm portion 102c have an integral structure.
The rotation support unit 102 is rotationally driven with respect to the fixed unit 100 about the axis Az of the shaft unit 102a. The rotation support unit 102 supports the radiation irradiation unit 101, and rotates the radiation irradiation unit 101 around the axis Az of the shaft unit 102a by rotational driving. The rotation support unit 102 rotates the radiation irradiation unit 101 around the patient fixed to the bed 2 by the rotation driving. Hereinafter, the direction in which the rotation support portion 102 rotates is referred to as “rotation direction Dc”.

In the present embodiment, the axis Az of the shaft portion 102a is configured to coincide with the axis of the body posture axis of the patient OBJ fixed to the bed 2, but the radiation irradiation unit 101 is rotated around the patient OBJ. If this is the case, it does not have to coincide with the axis of the body axis of the patient OBJ.
For example, the bed 2 may be configured so that the axis of the body axis of the patient OBJ fixed to the bed 2 can be freely changed with respect to the axis Az of the shaft portion 102a. Specifically, the bed 2 may be configured to be turnable in a horizontal plane around the fixed portion 100.
Further, if the axis of the body axis of the patient OBJ fixed to the bed 2 is orthogonal to the axis Az of the shaft portion 102a in the horizontal plane, it is difficult to acquire the left and right images of the patient OBJ. An image of the abdomen can be acquired from the top.
Furthermore, it is also possible to determine the overall coordinates by detecting a plurality of 3D data having different angles between the axis Az of the shaft portion 102a and the axis of the body position axis of the patient OBJ fixed to the bed 2.

The arm portion 102c extends in the Z direction from the proximal end 102d to the distal end 102e. The Z direction is a direction in which the axis Az extends from the fixed portion 100 toward the bed 2.
The arm portion 102c is integrated with the rotating portion 102b at the base end 102d. Therefore, the arm part 102c rotates around the axis line Az of the shaft part 102a together with the rotating part 102b.

  The rotation support unit 102 supports the radiation irradiation unit 101 and the 3D scanner unit 103 at the tip 102e of the arm unit 102c. In the present embodiment, the radiation irradiation unit 101 is provided on the lower surface 102f of the tip 102e of the arm 102c, and the 3D scanner unit 103 is provided on the side surface 102g of the tip 102e of the arm 102c. In the case of this embodiment, the 3D scanner unit 103 is attached to the frame of the rotation support unit 102 by a fixture or an adhesive.

  If the 3D scanner unit 103 and the radiation irradiation unit 101 are provided in the rotation support unit 102, the 3D scanner unit 103 rotates around the axis Az together with the radiation irradiation unit 101. Therefore, since the 3D scanner unit 103 rotates on the same rotation axis as the radiation irradiation unit 101, the 3D scanner unit 103 can detect 3D data while moving along the rotation trajectory of the radiation irradiation unit 101. Further, the 3D scanner unit 103 and the radiation irradiation unit 101 rotate at the same rotation angle.

  In the present embodiment, the 3D scanner unit 103 and the radiation irradiation unit 101 are provided adjacent to the tip 102e of the arm unit 102c.

  The rotation support unit 102 further includes an X-ray imaging unit 104 having an X-ray irradiation unit 104a and an X-ray detection unit 104b, and a radiation detection unit 109 as accessories. The X-ray irradiation unit 104 a and the X-ray detection unit 104 b are provided at positions facing each other across the axis Az, and can rotate around the axis Az using the rotation of the rotation support unit 102.

  The X-ray irradiation unit 104 a emits X-rays toward the patient fixed to the bed 2. The irradiated X-ray passes through the patient and is detected by the X-ray detection unit 104b. Therefore, the X-ray imaging unit 104 detects two-dimensional data such as a patient X-ray image. Furthermore, the X-ray imaging unit 104 can also be used as a CT scanner by taking a plurality of X-ray images at different rotational positions by using the rotation of the rotation support unit 102 and reconstructing the CT image. Since the X-ray imaging unit 104 can also be rotated on the same rotation axis as the radiation irradiation unit 101, a plurality of X-ray images along the rotation trajectory of the radiation irradiation unit 101 can be detected.

The radiation detection unit 109 is provided at a position facing the radiation irradiation unit 101 with the patient fixed on the bed 2 interposed therebetween, and detects a transmission image of the radiation irradiated from the radiation irradiation unit 101 for treatment.
In the present embodiment, the radiation irradiation unit 101 emits X-rays having energy different from that of the X-ray irradiation unit 104a. Therefore, the radiation detection unit 109 can detect X-rays having energy different from the X-rays detected by the X-ray detection unit 104b. For example, when X-ray images are acquired by the radiation detection unit 109 and the X-ray detection unit 104b, the X-ray images detected by the X-ray detection unit 104b and the X-ray images detected by the radiation detection unit 109 are X-ray images having different energies. Can be acquired.

  The bed 2 fixes the patient in a sleeping posture. The bed 2 is slidable along the Z direction.

Details of the 3D scanner unit 103 will be described.
As illustrated in FIG. 4, the 3D scanner unit 103 scans the sensor light SL (for example, infrared light) toward the patient OBJ fixed to the bed 2.
The 3D scanner unit 103 includes a sensor light irradiation unit 103a that irradiates the sensor light SL, and a sensor light detection unit 103b that detects reflected light. The 3D scanner unit 103 scans the surface of the object with the sensor light SL emitted from the sensor light irradiation unit 103a, analyzes the reflected light from the surface, and 3D data (three-dimensional data) on the surface. To detect.
In the case of the present embodiment, by providing the 3D scanner unit 103 and the radiation irradiation unit 101 adjacent to each other, the position of the sensor light SL irradiated by the sensor light irradiation unit 103a is the region where the radiation irradiation unit 101 emits radiation ( (Irradiation field). As a modification, the position of the sensor light SL irradiated by the sensor light irradiation unit 103 a may be matched with the periphery of the irradiation field of the radiation irradiation unit 101. As another modification, the position of the sensor light SL irradiated by the sensor light irradiation unit 103 a may be set to a position different from the irradiation field of the radiation irradiation unit 101.

  In the present embodiment, the 3D scanner unit 103 scans the sensor light SL emitted from the sensor light irradiation unit 103a with respect to the face and body surface of the patient OBJ, and the reflected light from the patient OBJ face and body surface. And 3D data of the face and body surface of the patient OBJ is detected.

  The detected 3D data is sent from the 3D scanner unit 103 to the processing unit 105. The processing unit 105 includes a storage unit 106 that stores the received 3D data and a determination unit 107 that determines the positional deviation of the patient OBJ based on the 3D data.

  As a method for detecting 3D data, there are a method using a triangulation method, a method using a phase difference distance measurement method, and the like. In the case of the present embodiment, the sensor light irradiation unit 103a of the 3D scanner unit 103 emits slit-shaped laser light extending in the Z direction as the sensor light SL. Therefore, in this embodiment, the 3D scanner unit 103 scans the surface of the patient OBJ's body and face with the slit-shaped laser light extending in the Z direction as shown in FIG. According to the principle, distance information from the body of the patient OBJ and the surface of the face is obtained and converted into three-dimensional data.

  As a modification, the 3D scanner unit 103 scans the sensor light SL, and obtains distance information from the body and face of the patient OBJ based on the phase difference and time difference between the sensor light SL and the reflected light of the sensor light SL. It may be obtained and converted into three-dimensional data. As another modification, the 3D scanner unit 103 scans two adjacent sensor lights SL, and the distance from the body or face of the patient OBJ from the phase difference or time difference of the reflected light of each of the two sensor lights SL. Information may be obtained and converted into three-dimensional data. In addition, the shape of the sensor light SL may not be a slit shape, and may be a spot shape, for example, as long as surface scanning is possible.

As shown in FIG. 5, the 3D scanner unit 103 uses the rotation of the rotation support unit 102 to rotate around the axis Az in the rotation direction Dc, and scans the surface of the body and face of the patient OBJ. To do.
In the case of the present embodiment, scanning in the direction intersecting the Z direction can be performed by rotation in the rotation direction Dc, so that the sensor light SL can be scanned in the direction intersecting with the extending direction of the laser light. Thus, the surface of the body and face of the patient OBJ can be scanned.

  As a modification, the sensor light irradiation unit 103a may scan spot-shaped laser light in the Z direction with a polygon mirror or the like instead of irradiating slit-shaped laser light extending in the Z direction. In this case, the surface of the body and face of the patient OBJ is scanned by raster scanning by scanning in the Z direction of the spot-shaped laser beam by the sensor light irradiation unit 103a and scanning in the rotation direction Dc by rotation of the rotation support unit 102. be able to.

  The 3D data detected by the surface scanning is used by the determination unit 107 to determine the positional deviation of the patient OBJ. In the present embodiment, as shown in FIG. 6, by comparing the 3D data of the body of the patient OBJ obtained at the first time and the 3D data of the body of the patient OBJ obtained at the second time, the position shift is determined. The positional deviation of the patient OBJ is determined.

For example, 3D data of the body of the patient OBJ detected at the time of the first radiotherapy is stored in the storage unit 106 in advance. In the first time, the posture of the patient OBJ with respect to the radiation irradiation unit is corrected in combination with X-rays or CT images by moving the patient OBJ or the bed 2, and 3D data as a reference is detected in the corrected posture.
Thereafter, 3D data of the body of the patient OBJ detected at the time of the second radiotherapy is stored in the storage unit 106. Then, in the determination unit 107, the 3D data of the body of the patient OBJ obtained in the first time stored in the storage unit 106, and the 3D data of the body of the patient OBJ obtained in the second time stored in the storage unit 106. , And the positional deviation is determined.
Here, the data comparison between the first time and the second time has been described. However, the data comparison is not limited to the first time and the second time, but the data comparison between the first time and the third time or any other number of times can be performed. It is also possible to do this. It is possible to set arbitrary reference 3D data.
In addition to the data comparison, as shown in FIG. 6, the first detected image (3D data) is used as a reference image, and the second and subsequent times are overlapped with the reference image to obtain specific numerical values of XYZ coordinates. The difference is obtained, and the patient OBJ and the bed 2 are moved by the difference, and treatment is performed at the correct position.
For example, the specific numerical difference of the XYZ coordinates is obtained by moving the second image three-dimensionally with respect to the reference image. The second image is moved to a position where the reference image and the second image exactly overlap. And it is set as the movement distance which correct | amends the difference of the coordinate for the moved part.

  As a modification, the positional deviation may be determined by comparing 3D data of the body of the patient OBJ detected at the time of radiotherapy with 3D data of a preset frame or marker. The preset frame and marker 3D data are stored in the storage unit 106 and read out at the time of comparison.

As another modification, the determination unit 107 may authenticate the patient OBJ using 3D data. The determination of authentication may be performed by comparing the 3D data at the time of the first radiation treatment with the 3D data at the time of the second radiation treatment, as in the case of the determination of displacement. Data may be compared with 3D data obtained at the time of radiation therapy.
If the patient OBJ can be authenticated based on the 3D data detected by the 3D scanner unit 103, it is possible to determine the patient OBJ difference or the patient OBJ data difference. In particular, by comparing 3D data, the features and skeletons of the patient OBJ are compared and the individual information of the patient OBJ can be determined. Therefore, the difference of the patient OBJ or the data of the patient OBJ is accurately determined. be able to.
When a patient OBJ difference or a patient data difference is detected, the operator confirms or corrects the patient OBJ or confirms or corrects the patient OBJ data.

Actions and effects in configuring the radiotherapy apparatus of this embodiment will be described.
The radiotherapy apparatus 10 according to the present embodiment uses the rotation of the rotation support unit 102 to rotate the 3D scanner unit 103 around the axis Az. Therefore, since it is not necessary to provide a mechanism for rotating the 3D scanner unit 103, the mechanism of the radiation therapy apparatus 10 can be extremely simplified.

Moreover, the radiotherapy apparatus 10 of this embodiment is realizable only by adding a 3D scanner part to the rotation support part of the existing radiotherapy apparatus. Therefore, the radiotherapy apparatus 10 of the present embodiment can be configured without greatly changing the design and manufacturing process of the existing radiotherapy apparatus.
In the case of the present embodiment, the 3D scanner unit 103 is added to the rotation support unit of the existing radiotherapy apparatus by simple modification so that the 3D scanner unit 103 is attached to the frame of the rotation support unit 102 with a fixture or an adhesive. doing. As a modification, the 3D scanner unit 103 may be incorporated into the rotation support unit 102 at the design stage or the manufacturing stage, or may be integrally formed by changing the design or manufacturing process of the existing radiotherapy apparatus.

Furthermore, in this embodiment, since the 3D scanner unit 103 and the radiation irradiation unit 101 are provided on the rotation support unit 102 that is a common rotation mechanism, the 3D scanner unit 103 and the radiation irradiation unit 101 are always on the same rotational surface. And can be rotated at a rotation angle.
For example, when the 3D scanner unit 103 and the radiation irradiation unit 101 are not provided in a common rotation mechanism but are provided in separate rotation mechanisms, the rotation surfaces and rotation axes of the 3D scanner unit 103 and the radiation irradiation unit 101 are completely coincident with each other. It is difficult to let
However, if the rotation surfaces and rotation angles of the 3D scanner unit 103 and the radiation irradiation unit 101 are not matched, the irradiation position of the sensor light SL irradiated by the sensor light irradiation unit 103a is determined at a position in a certain rotation direction Dc. Even in accordance with the irradiation field, the irradiation position of the sensor light SL and the irradiation field of the radiation irradiation unit 101 are shifted at other positions in the rotation direction Dc.
Even if the rotation surfaces and the rotation axes of the 3D scanner unit 103 and the radiation irradiation unit 101 can be matched, in order to rotate the same rotation surface and rotation angle, the rotation mechanisms are aligned (rotation axis alignment, Origin control) and control to adjust the rotation angle.
On the other hand, in the case of this embodiment, since the 3D scanner unit 103 and the radiation irradiation unit 101 are rotated by a common rotation mechanism, the rotation surface and the rotation axis of the 3D scanner unit 103 and the radiation irradiation unit 101 can be easily set. Can be matched. Furthermore, since it is not necessary to perform complicated alignment, the rotation planes and rotation angles of the 3D scanner unit 103 and the radiation irradiation unit 101 can be matched with high accuracy while using a simple mechanism.
In addition, once the radiation irradiation unit 101 matches the irradiation position of the sensor light SL with the radiation irradiation field, the irradiation position of the sensor light SL and the irradiation field of the radiation irradiation unit 101 can be obtained at any rotational direction Dc. Will not shift.

Next, functions and effects on the performance of the radiotherapy apparatus of this embodiment will be described.
Since the rotation support unit 102 of the radiation irradiation unit 101 is used, the same control as that of the radiation irradiation unit 101 is possible. Therefore, highly reproducible and highly accurate 3D data can be detected, and highly accurate setup can be performed. In addition, since the 3D data is used, it is possible to determine the positional deviation using the spatial information, not the surface information of the patient OBJ, as compared to the case of detecting the 2D data.

In addition, compared to the case where 3D data is detected using a CT scanner that irradiates the patient OBJ with X-rays, the 3D data is detected by irradiating light such as infrared rays. The problem of exposure) does not occur.
Similarly, the X-ray exposure problem does not occur as compared with the case of detecting an X-ray image in which the patient OBJ is irradiated with X-rays. In addition, since the amount of information is larger than in the case of detecting 2D data called an X-ray image (two-dimensional image), a highly accurate setup can be performed.

Furthermore, in order to detect 3D data of the body and face of the patient OBJ, the body and face contours of the patient OBJ and the characteristics of each part and organ are extracted, and the body, face, each part or each organ of the patient OBJ is extracted. It is possible to specify the position and orientation. In particular, it is advantageous for detecting 3D data of a part or organ (particularly, breast) close to the body or face of the patient OBJ.
Setup is possible if the position and orientation of the body and face of the patient OBJ can be identified. Therefore, since it is possible to set up the body and face of the patient OBJ without marking the body and face of the patient OBJ, stress on the patient OBJ due to the marking is reduced.

  In addition, to detect 3D data on the body and face of the patient OBJ, confirm information that was not found in the 2D photograph or X-ray image, such as confirmation of the irradiation field, lesions, side effects, etc. can do. In order to confirm the irradiation field, the lesion, and the side effect, etc., 3D data of the body or face of the patient OBJ may be converted into an image and displayed on a display device or printed as a printed matter. The displayed or printed image is confirmed by the operator. Also, it can be stored as an image in a medical chart or the like.

In the present embodiment, the 3D scanner unit 103 is provided on the distal end 102e of the arm unit 102c, particularly on the side surface 102g.
As a modification, the 3D scanner unit 103 has a position around the axis Az in the rotation support unit 102, that is, a position that rotates around the axis Az in the rotation direction Dc as the rotation support unit 102 rotates. It may be provided at any position.
For example, the 3D scanner unit 103 may be provided at the base end 102d of the arm unit 102c as a position of the rotation support unit 102 that rotates around the axis Az in the rotation direction Dc.
In addition, the 3D scanner unit 103 may be provided in the rotation unit 102b as a position of the rotation support unit 102 that rotates around the axis Az in the rotation direction Dc.

  Further, as a position of the rotation support unit 102 that rotates around the axis Az in the rotation direction Dc, various accessories such as the X-ray irradiation unit 104a, the X-ray detection unit 104b, and the radiation detection unit 109 of the X-ray imaging unit 104 are used. A 3D scanner unit 103 may be provided. In addition, the 3D scanner unit 103 may be provided on a member that the rotation support unit 102 supports the various accessories.

In any case, the 3D scanner unit 103 provided at a position that rotates around the axis Az rotates with the radiation irradiation unit around the axis Az, and detects 3D data along the rotation trajectory of the radiation irradiation unit 101. be able to.
However, since the moving distance of the 3D scanner unit 103 in the rotation direction Dc increases as the position where the 3D scanner unit 103 is provided is farther from the axis Az, it is possible to detect 3D data with relatively high resolution. it can.

As another modification, the 3D scanner unit 103 may be provided in the radiation irradiation unit 101. When the radiation irradiation unit 101 is provided, the 3D scanner unit 103 is provided at a position avoiding the radiation emission location, for example, around the radiation emission location in the radiation irradiation unit 101.
By providing in such a position, the 3D scanner unit 103 can rotate around the axis Az using the rotation of the rotation support unit 102 without the radiation irradiation unit 101 preventing radiation emission.

"Method of operating radiotherapy equipment"
As an example, the operation method of the radiotherapy apparatus of the first embodiment will be described with reference to FIG.
First, the radiotherapy apparatus 10 uses the rotation of the rotation support unit 102 to rotate the 3D scanner unit 103 attached to the rotation support unit 102 around the axis Az in the rotation direction Dc, while the body of the patient OBJ. Then, light is scanned over the surface of the face (scanning step: S1).

  In the scanning step S1, the radiotherapy apparatus 10 drives the rotation support unit 102 to rotate the 3D scanner unit 103 around the patient OBJ, and moves from the 3D scanner unit 103 toward the body and face of the patient OBJ. The sensor light SL is irradiated and 3D data is detected.

  Subsequently, the radiotherapy apparatus 10 performs the scanning step S1, and the detected 3D data is converted into other 3D data including the 3D data of the body of the patient OBJ and the 3D data of the frame and the marker obtained in the first time. (Comparison step: S2). The radiotherapy apparatus 10 determines the position deviation or authentication of the body or face of the patient OBJ through the comparison in the comparison step S3. In the present embodiment, in the comparison step, a difference in coordinates is calculated, the difference, the bed 2 is moved, and the patient OBJ is moved to the correct position. If the images are not aligned properly, re-setup is performed.

  When it is determined that there is no problem even if the radiation treatment is performed as a result of the determination of the displacement of the body or face of the patient OBJ or the determination of the authentication, the operator performs the radiation treatment (treatment step: S4).

"Second embodiment"
A second embodiment of the radiotherapy apparatus according to the present invention will be described with reference to FIG.

The radiotherapy apparatus 510 of this embodiment is basically the same as that of the first embodiment, except that a ring-shaped rotation support part is accommodated in a cylindrical hollow space of the fixed part. .
As shown in FIG. 8, the radiation therapy apparatus 510 includes a fixing unit 600, a radiation irradiation unit 601, a rotation support unit 602, a 3D scanner unit 103, and a bed 2.
The fixing part 600 is fixed to the floor surface FL of the radiotherapy room. The fixing unit 600 fixed to the floor surface FL supports the radiation irradiation unit 601, the rotation support unit 602, and the 3D scanner unit 103. The fixed part 600 has a cylindrical hollow space with the axis Az as an axis.

The rotation support portion 602 has a ring shape centered on the axis Az. That is, the ring shape of the rotation support portion 602 and the cylindrical shape of the fixed portion 600 are coaxially arranged with respect to the axis Az. The rotation support part 602 is accommodated in a cylindrical hollow space of the fixed part 600.
The rotation support portion 602 is driven to rotate about the axis Az with respect to the fixed portion 600. The rotation support unit 602 supports the radiation irradiation unit 601 on a part of the ring-shaped circumference, and rotates the radiation irradiation unit 601 around the axis Az by rotation driving. In the case of this embodiment, the radiation irradiation part 601 is accommodated in the rotation support part 602.
The rotation support unit 602 rotates the radiation irradiation unit 601 around the patient fixed to the bed 2 by the rotation driving.

  The rotation support unit 602 supports the 3D scanner unit 103 on a part of the ring-shaped circumference. In the case of this embodiment, the 3D scanner unit 103 is attached to the frame of the rotation support unit 602 with a fixture or an adhesive. Therefore, since the 3D scanner unit 103 and the radiation irradiation unit 601 are provided on the rotation support unit 602, the 3D scanner unit 103 rotates together with the radiation irradiation unit 601 around the axis Az. Further, since the 3D scanner unit 103 rotates on the same rotation axis as the radiation irradiation unit 601, the 3D scanner unit 103 can detect 3D data while moving along the rotation trajectory of the radiation irradiation unit 601. Further, the 3D scanner unit 103 and the radiation irradiation unit 601 rotate at the same rotation angle.

  In this embodiment, as shown in FIG. 8, the 3D scanner unit 103 is provided at the same position with respect to the radiation irradiation unit 601 and the rotation direction Dc, but may be provided at a different position with respect to the radiation irradiation unit 601 and the rotation direction Dc. Good.

  Further, as a modification similar to the first embodiment, the 3D scanner unit 103 is incorporated into the rotation support unit 602 in the design stage or the manufacturing stage by changing the design or manufacturing process of the existing radiation therapy apparatus, or is integrally molded. You may do it.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to the said embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

In the present embodiment, the 3D scanner unit 103 scans light on the body or face of the patient OBJ, but may scan the clothes, badges, armbands, and the like of the patient OBJ.
If the patient OBJ is not stressed, a marker MK as shown in FIG. 6 may be attached to the body or face of the patient OBJ, and the attached marker may be scanned.

In the present embodiment, setup is performed using 3D data detected by the 3D scanner unit 103. In the case where some X-ray exposure is allowed and the accuracy is improved, the coordinates of the patient OBJ detected by the X-ray imaging unit 104 and / or the radiation detection unit 109 are detected by the 3D scanner unit 103. In addition, it may be determined whether the positional deviation or authentication is performed by comparing with the 3D data. However, when comparing the 3D data of the patient OBJ detected by the X-ray imaging unit 104 with the 3D data detected by the 3D scanner unit 103, the patient is determined from the 3D data of the patient OBJ detected by the X-ray imaging unit 104. It is necessary to extract 3D data of the OBJ body and the face surface. Furthermore, it is necessary to associate each piece of extracted 3D data with each piece of 3D data detected by the 3D scanner unit 103.
Further, not only the comparison of the coordinates obtained from the X-ray imaging unit 104 or the radiation detection unit 109 with the 3D data detected by the 3D scanner unit 103, but also, for example, the X-ray imaging unit 104 (or the radiation detection unit 109). Both the X-ray images detected in step 3 and the 3D data detected by the 3D scanner unit 103 may be compared. If the comparison is made based on the standard for each device, the information of each coordinate is linked, so it is possible to compare the difference of each coordinate in the evaluation of the same device instead of the evaluation in different devices. .

  The 3D scanner unit 103 of the present embodiment detects 3D data of the body and face of the patient OBJ using infrared rays, but the body and face of the patient OBJ or the body and face of the patient OBJ. 3D data may be detected using far-infrared light, near-infrared light, visible light, or ultraviolet light, as long as a reflection image of a part close to can be obtained. In particular, when visible light is used, since a color image can be detected, it is possible to determine misalignment or authentication based on the color image.

2 Bed 10 Radiotherapy apparatus 100 Fixing part 101 Radiation irradiation part 102 Rotation support part 102a Shaft part 102b Rotation part 102c Arm part 102d Base end 102e Tip end 102f Bottom face 102g Side surface 103 Scanner part 103a Sensor light irradiation part 103b Sensor light detection part 104 X X-ray imaging unit 104a X-ray irradiation unit 104b X-ray detection unit 105 processing unit 106 storage unit 107 determination unit 109 radiation detection unit 510 radiation therapy apparatus 600 fixing unit 601 radiation irradiation unit 602 rotation support unit Az axis Dc rotation direction FL floor surface OBJ Patient SL Sensor light MK Marker

Claims (5)

A radiation irradiation unit for irradiating the patient with radiation;
A rotation support unit for supporting the radiation irradiation unit and rotating the radiation irradiation unit around the patient;
A radiation therapy apparatus comprising: a 3D scanner unit attached to the radiation irradiation unit or the rotation support unit, rotated around the patient, and radiates sensor light toward the patient.   The radiotherapy apparatus according to claim 1, further comprising: a determination unit that determines a displacement of the patient based on the three-dimensional data of the patient acquired by the 3D scanner unit.   The radiotherapy apparatus according to claim 1, further comprising a determination unit configured to perform determination based on the patient authentication based on the three-dimensional data of the patient acquired by the 3D scanner unit.   The radiotherapy apparatus according to any one of claims 1 to 3, wherein the 3D scanner unit rotates together with the radiation irradiation unit.   5. The scanning step of irradiating the sensor light from the 3D scanner unit toward the patient is performed while rotating the rotation support unit and rotating the 3D scanner unit around the patient. The operation | movement method of the radiotherapy apparatus as described in any one of these.

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