JP2002263090A - Examination treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an examination treatment apparatus of high image quality and low exposure quantity capable of performing examination and treatment at the same time. SOLUTION: The examination treatment apparatus is equipped with sensor arrays 75 and 88 arranged to at least a part on the circumference of a circle surrounding a subject in order to detect X-rays transmitted through the subject and X-ray irradiation heads 20, 74 and 76 movably arranged on the circumference of a circle concentric to the arrangement of the sensor arrays in opposed relation to the sensor arrays so as to hold the subject. This examination treatment apparatus is further equipped with electron beam generation parts 21, 22, 77 and 85, wave guides 12-16, 15, 27 and 50-55b for guiding the electron beams generated in the electron beam generation parts to an X-ray irradiation head, acceleration mechanisms 26 and 78 provided to the waveguides and allowing electromagnetic waves to act on the electron beams passed through the waveguides to accelerate the electron beams, the X-ray generation parts 32 and 79 for treatment provided to the waveguides and emitting high energy X-rays when the electron beams accelerated by the acceleration mechanisms are incident and the X-ray generation parts 33 and 74 for examination provided to the waveguides and emitting low energy X-rays when electron beams generated in the electron beam generation parts are incident without being accelerated by the acceleration mechanisms.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an examination and treatment apparatus for performing examination and treatment using X-rays.

[0002]

2. Description of the Related Art In a medical X-ray apparatus, X-rays arranged in an arc are used.
A specific X-ray is generated by injecting an electron beam into a X-ray target, and the X-ray transmitted through the subject is detected by a detector (sensor array) arranged opposite to the target, and signal processing is performed on the X-ray tomographic image. Can be obtained.

[0003] Medical X-ray apparatuses include examination equipment used for X-ray CT diagnosis and treatment equipment used for radiation therapy. These examination equipment and treatment equipment are often provided in different places in hospitals. However, there is an inconvenience that a patient who undergoes examination and treatment at the same time must move from the examination room to the treatment room. In addition, since a doctor who performs treatment makes a decision on treatment based on the results of a test performed a long time ago, there is a problem that it is difficult to accurately determine a portion to be treated on the spot.
Furthermore, since the test equipment and the treatment equipment are separate and independent equipment, there is a disadvantage that the occupied floor area in the hospital is large. Therefore, an imatron device that can be used for both examination and treatment with one device has been developed and put to practical use.

FIG. 11 is a schematic diagram showing an outline of an imatron device used for X-ray examination and treatment. Imatron device 1
Reference numeral 00 denotes a power supply 101, an electron gun 102, a focusing coil 103, a deflection coil 104, and a beam stop 1
06 as well as the vacuum pumps 105a,
105b, target ring 107, collimator 10
8. Detectors 109a and 109b, data recording device 110
It has. The deflection coil 104 is controlled by a controller (not shown), and adjusts a beam deflection angle of the electron beam 2 according to treatment or examination. An electron beam 2 emitted from an electron gun 102 is converged by a focusing coil 103 and deflected by a deflection coil 104, and is deflected by a target ring 1 below.
07.

[0005] The target ring 107 has a plurality of targets A, B, C and D. When the beam deflection angle of the electron beam 2 is changed by the deflection coil 104 in accordance with the contents of the treatment or the examination, for example, when the irradiation position of the electron beam 2 is changed from the target A to the target B, the X-ray emitted from the target A is different. The X-ray 3 is emitted from the target B, narrowed down by the collimator 108, transmitted through the irradiation site 5 of the patient 4, and detected by the detectors 109a and 109b. Further, the transmitted X-ray detection data is recorded in the data recording device 110, and an X-ray tomographic image is formed by a signal processing device (not shown). The beam stop 106 is a shield for preventing unnecessary exposure of the patient 4 on the bed.

[0006]

However, the conventional imatron apparatus 100 has a large electron beam deflection mechanism for switching the X-ray generation position and a large waveguide for guiding the electron beam to the target, and has a large number of fixed detection elements. Container 109
Since transmitted X-rays are detected by a and 109b, the system becomes large as a whole. For this reason, the occupied floor area of the apparatus is considerably large, and there is almost no merit of reducing the footprint. Further, in the conventional apparatus 100, even though the X-ray 3 is narrowed down by the collimator 108, the fan-shaped X-ray 3 (fan beam) tends to be uneven, and it is difficult to obtain a clear image. In addition, it is necessary to focus the fan beam 3 in order to prevent exposure of other parts than the irradiation part 5.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a high-quality, low-exposure inspection and treatment apparatus capable of performing inspection and treatment with a single apparatus.

[0008]

According to the present invention, there is provided a test and treatment apparatus comprising: a sensor array arranged on at least a part of a circumference surrounding a subject for detecting X-rays transmitted through the subject; An X-ray irradiation head movably arranged on a circle concentric with the arrangement of the sensor array so as to face the sensor array with a subject interposed therebetween, comprising: A generating unit, a waveguide for guiding the electron beam generated by the electron beam generating unit to the X-ray irradiation head, and an electromagnetic wave acting on the electron beam passing through the waveguide provided on the waveguide. An acceleration mechanism for accelerating the X-ray, a therapeutic X-ray generator that is provided in the waveguide and emits high-energy X-rays when an electron beam accelerated by the acceleration mechanism enters the waveguide, Without being accelerated by the acceleration mechanism When the electron beam which is generated in the child-ray generation unit is incident, characterized by comprising a test X-ray generation unit which emits low energy X-rays, a.

The inspection and treatment apparatus according to the present invention comprises: an electron beam generator having a filament for generating thermoelectrons; an accelerating tube having a coil communicating with the electron beam generator for accelerating a thermoelectron beam; A focusing tube having a coil communicating with the tube and focusing the electron beam, a first target for generating a high-energy X-ray when a high-energy electron beam accelerated by the accelerator tube is incident, and When a low-energy electron beam that is not accelerated by the acceleration tube is incident, a second target that generates low-energy X-rays whose energy level is lower than that of the X-ray generated by the first target;
And a target converter that holds the second target movably and selectively positions the first and second targets at a position where the electron beam focused by the focusing tube is incident, and is emitted from each target. X-ray emission direction changing means for respectively changing the directions of the first and second targets with respect to the subject so that the X-rays are directed to the subject; and low-energy X-rays and high-energy X-rays depending on the examination or treatment. And a controller for controlling ON / OFF of the accelerating tube in order to switch the acceleration tube.

A test and treatment apparatus according to the present invention includes a rotating drum surrounding a subject, an X-ray generator for inspection and a sensor array for inspection, which are fixed to and opposed to the rotating drum, and fixed to the rotating drum. X for treatment
An examination / treatment device comprising: a ray generation device and a treatment sensor assembly; and a power supply for supplying power to the examination X-ray generation device and the treatment X-ray generation device.

In general, the X-ray energy used for transmission inspection is at most 150 keV, whereas the X-ray energy used for radiotherapy is about several MeV (up to 10 MeV).
(MeV), the X-ray energy levels for examination and treatment are significantly different. However, in order to accelerate the electron beam to a high energy region of several MeV class, 100 keV
It is necessary to accelerate the electron beam with an acceleration tube to a degree to make it incident on the X-ray target.

Further, since the intensity of the emitted X-ray when the electron beam is incident on the X-ray target has direction dependency, the angle of incidence on the X-ray target depends on the emission angle at which the X-ray intensity is maximized. It is important to adjust. By the way, several M
When the high-energy electron beam 2a of eV is vertically incident on the X-ray target 32 at an incident angle of 0 °, the intensity of the X-ray emitted at an emission angle of 0 ° is maximum as shown in FIG. Therefore, the collimator 41 can be arranged in the 0 ° azimuth and emitted as the therapeutic X-ray 3a. On the other hand, 150
The low energy electron beam 2 b of about keV is applied to the X-ray target 3.
In the case where the light was incident on the sample No. 3 at an incident angle of 45 °, FIG.
Since the intensity of the X-rays emitted at an emission angle of 45 ° is maximized as shown in (2), the collimator 42 can be arranged in the 45 ° azimuth and emitted as the inspection X-rays 3b. In this case, it is necessary to tilt the X-ray irradiation head or the target according to the maximum emission intensity direction of the X-ray. As a specific means, it is preferable to use a swing mechanism for swinging the X-ray irradiation head or a target tilt mechanism for tilting the X-ray target with respect to the electron beam axis.

According to the apparatus of the present invention, treatment and examination can be performed by a single apparatus by selectively generating X-rays having different energy levels, and a treatment target portion of a subject can be located on the spot. It is possible to make an accurate judgment by inspecting immediately before. In addition, since examination and treatment can be performed continuously using the same device, there is no movement from the examination room to the treatment room, and the patient does not have to wait for a long time.

Further, according to the apparatus of the present invention, the distance from the X-ray source to the irradiation site is shorter than that of the conventional apparatus,
Since the diffusion (variation) of the fan beam is reduced, clear image quality can be obtained. For this reason, for example, it becomes possible to perform tomography of a blood vessel such as an artery.

Further, according to the apparatus of the present invention, the irradiation time of X-rays can be greatly reduced as compared with the conventional case, so that the amount of radiation received by the patient can be significantly reduced as compared with the conventional case.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

(First Embodiment) First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the examination / treatment device 6 includes a movable bed 8.
, Guide circle 9 and articulated robot arm 10
, Slider 11, X-ray irradiation head 20, and subject 4
And a sensor array (not shown) for detecting X-rays transmitted through the sensor array. The movable bed 8 is supported by an X-axis drive mechanism built in the base 7 so as to be movable in the longitudinal direction (X-axis direction). On the movable bed 8, the patient 4 as a subject is placed.
Lie and direct the X-ray irradiation head 20 straight to the diseased part 5 as shown in FIG. 1 to irradiate the treatment X-ray 3a to the diseased part 5 or, as shown in FIG. The patient is swung to the side to irradiate the affected part 5 with the inspection X-ray 3b.

The X-ray irradiation head 20 is movably supported by the guide circle 9 via the slider 11 of the articulated robot arm 10. The guide circle 9 is provided so as to straddle the movable bed 8, and the X is driven by an X-axis driving mechanism (not shown).
It is supported movably in the axial direction. The sensor array (detector), not shown, moves in the X-axis direction in conjunction with the guide circle 9.

The articulated robot arm 10 includes a slider 1
1, a first joint portion 12, a first arm 13, a second joint portion 14, a second arm 15, and a third joint portion 16 are link mechanisms which are connected to each other, and a θ drive mechanism (not shown) And η drive mechanism.

The θ drive mechanism is built in the slider 11 and swings the first arm 13 up and down around the first joint 12. The θ drive mechanism has a role of positioning the X-ray irradiation head 20 with respect to the subject 4 in cooperation with the X-axis drive mechanism.

The η drive mechanism is built in the second arm 15 or the X-ray irradiation head 20.
Is swung around the third joint 16. The η drive mechanism has a role as an X-ray emission direction changing means, and is controlled by a controller 40 shown in FIG. That is, the controller 40 interlocks and controls the target converter 30 and the η drive mechanism, which will be described later, based on a position detection signal from a position sensor (not shown).
0 is aimed at by aiming at the irradiation part 5 of the subject.

Next, the details of the X-ray irradiation head 20 will be described with reference to FIG.

FIG. 3 schematically shows the internal structure of the X-ray irradiation head 20.
Is covered with an outer case, and the above-mentioned articulated robot arm 1
The third joint 16 is pivotably connected to the third joint 16. Such an X-ray irradiation head 20 includes a power supply 21, an electron gun 2
3, an acceleration tube 25, a focusing tube 27, and a target chamber 29 are provided in this order. The power supply 21 to the target chamber 29 are arranged in series along the optical axis of the electron beam.

The power supply 21 is of a magnetron type. The circuit of the power supply 21 is connected to the controller 40. Electron gun 23
Is a power supply 2 which is provided in a chamber evacuated by the vacuum pump 24a and whose operation is controlled by the controller 40.
There is a filament (cathode) 22 connected to one circuit.

An accelerating tube 25 is provided continuously and in communication with the chamber in which the electron gun 23 is housed, so that the electron beam emitted from the electron gun 23 is accelerated. A coil 26 is wound around the outer periphery of the acceleration tube 25, and the coil 26 is connected to a power supply circuit whose operation is controlled by a controller 40. A grid electrode (not shown) is provided between the accelerating tube 25 and the electron gun chamber, and the gate voltage to the grid electrode is ON / OFF controlled by the controller 40. The accelerating tube 25 is evacuated by a vacuum pump 24b. The electron gun 23 has a filament wound in a coil shape.

A focusing tube 27 is provided so as to communicate with the accelerating tube 25, and the electron beam passing through the accelerating tube 25 is focused. A coil 28 is wound around the outer periphery of the focusing tube 27, and the coil 28 is connected to a power supply circuit whose operation is controlled by a controller 40.

The target chamber 2 communicates with the focusing tube 27 continuously.
When an accelerated electron beam 2a or an unaccelerated electron beam 2b is incident, a predetermined X-ray passes through the first or second window 29a, 29b in which a thin metal plate is fitted, and is externally provided. It is designed to be emitted. The first window 29a is arranged in the traveling direction (0 ° azimuth) of the electron beam. The second window 29b is arranged in a direction (90 ° azimuth) orthogonal to the optical axis of the electron beam. Further, a target converter 30 is provided in the target chamber 29.

As shown in FIG.
Is composed of a disk having two targets 32 and 33 and one opening 34, and is rotated around a spindle 31 by a drive mechanism 38. The rotation angle of the target converter 30 by the target conversion drive mechanism 38 is controlled by the controller 40.

When power is supplied from the power supply 21 to the filament 22, a large number of thermoelectrons are generated. The surface on which the electrons converged on the targets 32 and 33 collide is the focal point. When the generated thermoelectrons are accelerated by the acceleration tube 26, they become high-energy electron beams 2a and are incident on the first targets 32 for high-energy X-rays as shown in FIG. The therapeutic high-energy X-ray 3a having the maximum intensity level is emitted from the target 32 in the 0 ° azimuth.

On the other hand, when the thermoelectrons are not accelerated by the accelerating tube 26, they are directly converted into low-energy electron beams 2b as shown in FIG.
As shown in FIG. 3B, the light beam is incident on the second target 33 for low energy X-rays at a maximum incident angle of 45 °, and the target 3
3, the inspection low energy X-rays 3b having the maximum intensity level are emitted at the maximum emission angle of 45 °. That is, the low-energy X-ray 3b for inspection is emitted in an azimuth of up to 90 ° with respect to the incident electron beam 2b (0 ° azimuth). Therefore, the first collimator 41 for narrowing the therapeutic X-ray 3a is mounted at the 0 ° azimuth, and the second collimator 42 for narrowing the inspection X-ray 3b is mounted at the 90 ° azimuth.

The θ drive mechanism and the η drive mechanism of the articulated robot arm 10 are driven and controlled by the controller 40 in conjunction with the target conversion drive mechanism 38, and the X-ray irradiation head 20
The position and posture of the X-ray irradiation head 20 are controlled so that the X-rays 2a (2b) emitted from the X-ray irradiation unit 5 are correctly irradiated to the irradiation site 5. That is, when irradiating the therapeutic X-ray 2a, the irradiation head 20 is aimed straight at the irradiation site 5 as shown in FIG. Inspection X
When irradiating the line 2b, the irradiation head 20 is swung 90 degrees by the η drive mechanism as shown in FIG.
Aim sideways towards.

Although various metals or alloys can be used for the targets 32 and 33, the first target 32 is preferably a single metal such as tungsten, molybdenum or tantalum or an alloy thereof. The target 32 is preferably a single metal such as tungsten, molybdenum, or tantalum, or an alloy thereof.

Further, when the target converter 30 is rotated to position the opening 34 at the electron beam incident position, the opening 34
The irradiation head 2 while the electron beam 2b passes through
Emitted from 0.

In this embodiment, the magnetron system is used as the power source for the X-ray irradiation head. However, the present invention is not limited to this, and a klystron system power source may be used. In the case of using a klystron type power supply, as shown in FIG. 6, a rotary RF coupler 50 is attached to the joint of the articulated robot arm 10 and separately placed klystrons via waveguides 51 and 52 built in the arm. High frequency power is supplied from the power supply of the system.
The klystron type power supply has an advantage that a high peak power can be taken out, so that a large output is obtained and the operation is stabilized.

Next, the sensor array and the signal processing circuit will be briefly described.

Although not shown, the sensor array is supported by an annular or arc-shaped movable member that can move in parallel with the circle guide 9 that supports the X-ray irradiation head 20.
The transmitted X-ray information detected by the sensor array is converted into a current signal proportional to the transmitted X-ray dose, output to a data recording device via a preamplifier and a main amplifier, and recorded. The recorded data is then output to a data processing device and subjected to data processing, whereby X-ray CT image information of the subject can be obtained. An X-ray generation command is issued from the data recording device to the X-ray generation control device, and the X-ray generation
The X-ray generation control device controls generation of fan-shaped X-rays from the X-ray irradiation head 20. Note that the X-ray irradiation time at the time of inspection is 0.01 second per shot.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 9 and 10, the inspection and treatment apparatus 70 of the second embodiment comprises a housing 71, a rotating drum 72,
X-ray generator for inspection (inspection unit) 74, sensor array for inspection 75, X-ray generator for treatment (therapy unit) 7
6. Power supply 77, acceleration tube 78, target 79, circulator 80, dummy load 81, klystron (power supply) 85, rotation drive mechanism (drive circuit) 86, treatment sensor assembly 87, movable bed 90, and bed drive mechanism 91 ing.

The rotary drum 72 is housed in a hollow casing 71 and is driven to rotate around the X axis by a rotary drive mechanism 86. An inspection X-ray generator (inspection unit) 74 and an inspection sensor array 75 are fixedly arranged on the rotating drum 72 so as to face each other, and a treatment X-ray generator (treatment unit) 76 and a treatment sensor assembly 87 are provided. Are fixedly arranged so as to face each other.

The therapeutic X-ray generator 76 includes a power supply 77, an acceleration tube 78, a target 79, a circulator 80, a dummy load 81, and a klystron (power supply) 85. The klystron 85 and the acceleration tube 78 are connected by a plurality of rotary RF couplers 50 and a plurality of waveguides 51 and 52 shown in FIGS. 7 and 8, so that the electron beam 2a (2b) is guided.

As shown in FIG. 7, the rotary RF coupler 5
Numeral 0 is connected to each of the waveguides 51 and 52 by flange joints 53 and 54. As shown in FIG. 8A, the waveguides 55a and 55b of the waveguides 51 and 52 are rotary RF.
The electron beam 2a (2b) is guided while being reflected by a rotating space surrounded by the rotating members 56 and 57 of the coupler 50, as shown in FIG. 8B. In the figure, reference numeral 58 denotes a bearing, and reference numeral 5 denotes a bearing.
Reference numeral 9 denotes a λ / 4 wavelength choke.

The circulator 80 and the dummy load 81 have a function of matching the impedance of an electromagnetic wave sent from a power supply in order to prevent interference by a reflected wave from the small acceleration tube 78.

The therapeutic sensor assembly 87 includes a therapeutic sensor array (monitor sensor) 88 and a shield 89.

The movable bed 90 is moved in and out of the hollow portion of the rotary drum 72 by being moved in the X-axis direction by the bed driving mechanism 91.

[0045]

As described above, according to the present invention, X-rays having different energy levels are selectively generated, so that treatment and examination can be performed with a single device, and a treatment target portion of a subject can be treated. Can be inspected on the spot immediately before that to make an accurate judgment. In addition, according to the present invention, since examination and treatment can be performed successively using the same device, there is no movement from the examination room to the treatment room, and the patient does not have to wait for a long time.

In the present invention, the distance from the X-ray source to the irradiation site is shorter than that of the conventional apparatus, and the scattering (variation) of the fan beam is reduced, so that a clear image can be obtained. For this reason, for example, it becomes possible to perform tomography of a blood vessel such as an artery.

Further, in the present invention, since the irradiation time of X-rays can be significantly reduced as compared with the conventional case, the exposure dose to the patient can be greatly reduced as compared with the conventional case. By the way, in the apparatus of the present invention, the irradiation time of the X-ray is reduced to 1/10 of that of the conventional apparatus, so that the exposure dose to the subject is 0.05 to 0.2 mSv / 1 shot, Total exposure 4
The dose is significantly lower than that of millisievert, and is lower than the total dose of 0.5 millisievert at the time of lung examination.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an outline of a test and treatment apparatus (at the time of treatment) according to a first embodiment of the present invention.

FIG. 2 is an external perspective view showing an outline of the test and treatment apparatus (at the time of test) according to the first embodiment of the present invention.

FIG. 3 is an internal perspective cross-sectional view schematically illustrating an X-ray generation unit of the examination and treatment apparatus according to the first embodiment.

FIG. 4 is a plan view showing a target section having a plurality of switchable anode targets.

5A is a schematic diagram when generating a therapeutic X-ray using a high-energy electron beam, and FIG. 5B is a schematic diagram when generating a test X-ray using a low-energy electron beam.

FIG. 6 is a partially enlarged perspective view showing a joint portion of the robot arm and a rotary RF coupler.

FIG. 7 is a partially enlarged perspective view showing a rotary RF coupler and a waveguide.

FIG. 8A is an internal perspective sectional view schematically illustrating a rotary RF coupler, and FIG. 8B is a schematic view illustrating a reflection state of a microwave in the rotary RF coupler.

FIG. 9 is a schematic configuration diagram showing a test and treatment apparatus according to a second embodiment of the present invention.

FIG. 10 is an internal see-through sectional view schematically showing an examination / treatment device according to a second embodiment of the present invention as viewed from the axial direction.

FIG. 11 is an internal perspective sectional view showing an outline of a conventional device.

[Explanation of symbols]

2a, 2b: Electron beam, 3a, 3b: X-ray, 4: Subject (patient), 5: Irradiation site (affected part), 6: Test and treatment device, 7: Base, 8: Movable bed, 9: Guide circle Reference numeral 10: Articulated robot arm (X-ray emission direction changing means), 11: Slider, 12, 14, 16: Joint part, 13, 15: Arm, 20: X-ray irradiation head, 21: Magnetron (power supply), 22 ... cathode (filament), 23 ... electron gun, 24 ... vacuum pump, 25 ... acceleration tube (waveguide), 26 ... acceleration coil, 27 ... focusing tube (waveguide), 28 ... focusing coil, 29 ... target chamber, 30 ... Target converter (X-ray emission direction changing means) 31 ... Rotating axis 32 ... High energy X-ray target 33 ... Low energy X-ray target 34 ... Electron beam emission aperture 38 ... Target change Driving mechanism, 40: controller, 41, 42: collimator, 50: rotary RF coupler, 51, 52: waveguide, 53, 54: flange joint, 55a, 55b: waveguide, 56, 57: rotating member, 58 ... Bearing, 59 ... Choke, 70 ... Testing and treatment device, 71 ... Housing, 72 ... Rotating drum, 74 ... Testing X-ray generator (testing unit), 75 ... Testing sensor array, 76 ... Treatment X-ray generation Apparatus (treatment unit), 77: Power supply, 78: Accelerator tube, 79: Target, 80: Circulator, 81: Dummy load, 85: Klystron (power supply), 86: Rotary drive mechanism (drive circuit), 87: Treatment sensor Assemblies, 88: therapeutic sensor array (monitor sensor), 89: shield, 90: movable bed, 91: bed driving mechanism.

Claims (3)

[Claims] 1. A sensor array arranged on at least a part of a circumference surrounding a subject for detecting X-rays transmitted through the subject, and facing the sensor array with the subject interposed therebetween. An X-ray irradiation head movably disposed on a circle concentric with the arrangement of the sensor array as described above, comprising: an electron beam generator; and electrons generated by the electron beam generator. A waveguide for guiding a line to the X-ray irradiation head; an acceleration mechanism provided on the waveguide, for applying an electromagnetic wave to an electron beam passing through the waveguide to accelerate the electron beam; A therapeutic X-ray that emits high-energy X-rays when an electron beam accelerated by the acceleration mechanism is incident.
An X-ray generator for inspection, which is provided in the waveguide and emits low-energy X-rays when an electron beam generated by the electron beam generator is incident without being accelerated by the acceleration mechanism. When,
An examination / treatment device, comprising: 2. An electron beam generating section having a filament for generating thermoelectrons, an accelerating tube having a coil communicating with the electron beam generating section and accelerating a thermoelectron beam, and an electron beam communicating with the accelerating tube. A focusing tube having a coil for focusing, a high-energy electron beam accelerated by the accelerating tube, a first target for generating high-energy X-rays, and a low energy not accelerated by the accelerating tube. Incident on the first target, a second energy generating low energy X-ray having a lower energy level than the X-ray generated by the first target is generated.
And a target converter that holds the first and second targets movably and selectively positions the first and second targets at a position where the electron beam focused by the focusing tube is incident. X-ray emission direction changing means for changing the directions of the first and second targets with respect to the subject so that the X-rays emitted from each target are directed toward the subject; Wire and high energy X
A controller for controlling ON / OFF of the acceleration tube to switch between the line and the line. 3. A rotating drum surrounding a subject, an X-ray generator for inspection and a sensor array for inspection fixed to and opposed to the rotating drum, and a therapeutic treatment fixed to and opposed to the rotating drum. An examination and treatment apparatus comprising: an X-ray generator and a sensor assembly for treatment; and a power supply for supplying power to the X-ray generator for examination and the X-ray generator for treatment.