DE3014879C2 - Device for measuring the X-ray tube high voltage in an X-ray diagnostic system - Google Patents
Device for measuring the X-ray tube high voltage in an X-ray diagnostic systemInfo
- Publication number
- DE3014879C2 DE3014879C2 DE19803014879 DE3014879A DE3014879C2 DE 3014879 C2 DE3014879 C2 DE 3014879C2 DE 19803014879 DE19803014879 DE 19803014879 DE 3014879 A DE3014879 A DE 3014879A DE 3014879 C2 DE3014879 C2 DE 3014879C2
- Authority
- DE
- Germany
- Prior art keywords
- high voltage
- ray tube
- ray
- tube high
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005855 radiation Effects 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007620 mathematical function Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/265—Measurements of current, voltage or power
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/144—Measuring arrangements for voltage not covered by other subgroups of G01R15/14
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- X-Ray Techniques (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zur Messung der Röntgenröhrenhochspannung gemäß dem Oberbegriff des Patentanspruches.The invention relates to a device for measuring the X-ray tube high voltage according to the preamble of the claim.
Es ist bekannt, die Röntgenröhrenhochspannung über einen Meßfühler im Hochspannungskreis der Röntgenröhre, beispielsweise einen Spannungsteiler, zu messen. Am Meßfühler wird dabei ein der Röntgenröhrenhochspannung entsprechendes elektrisches Signal abgegriffen. Nachteilig ist dabei, daß der Meßfühler aus hochspannungsfesten B.'f'iclementen aufgebaut werden muß.It is known to measure the high voltage of the X-ray tube via a sensor in the high-voltage circuit of the X-ray tube, for example a voltage divider to measure. An X-ray tube high voltage is applied to the sensor corresponding electrical signal tapped. The disadvantage here is that the probe is made of high-voltage resistant B.'f'iclementen must be built.
Durch die US-PS 41 89 645 ist bereits eine Vorrichtung gemäß dem Oberbegrif» des Patentanspruches bekannt, bei der die Röntgenröhrenhocbspannung durch zwei Strahlendetektoren gemessen w^rd, die auf ihren F.ingangsseiten für die Strahlung durch zwei unterschiedliche Filter abgedeckt sind. Die Röntgenröhrenhochspannung wird dann aus den Ausgangssignalen der Strahlendetektoren durch Division und Berechnung mit Hilfe eines Mikroprozessors bestimmt. Die Bestimmung erfolgt nach einer vorgegebenen Formel. *iFrom US-PS 41 89 645 a device according to the preamble »of the claim is already known, at which the X-ray tube high voltage is measured by two radiation detectors placed on their F. entrance sides for the radiation are covered by two different filters. The X-ray tube high voltage is then derived from the output signals of the radiation detectors by dividing and calculating with Determined with the help of a microprocessor. The determination takes place according to a given formula. * i
Zeichnung dargestellten Ausführungsbeispieles näher erläutert Es zeigtDrawing illustrated embodiment explained in more detail
F i g. 1 ein Schaltbild einer entsprechenden Vorrichtung und
F i g. 2 Beispiele für abgespeicherte Kurven.F i g. 1 is a circuit diagram of a corresponding device and
F i g. 2 examples of saved curves.
In der F i g. 1 ist eine Röntgenröhre t dargestellt, die von einem Röntgengenerator 2 gespeist wird. Zur Messung der Röntgenröhrenhochspannung dienen zwei Strahlendetektoren 3 und 4. die auf ihren Eingarnsseiten für die Strahlung durch zwei Röntgenstrahlenfilter 5 und 6 unterschiedlicher Absorption abgedeckt sind. Die Ausgangssignale der Strahiendetektoren 3 und 4 werden über Strom-Spannungswandler 7 und 8 einem Dividierer 9 zugeführt. Das Auigangssignal des Dividierers 9 am Ausgang 10 stellt ein Maß für die Röntgenröhrenhochspannung dar und ist einem Analog-Digital-Wandler 11 zugeführt, der der jeweils gemessenen Röntgenröhrenhochspannung entsprechende digitale Informationen dem Speicher 12 zuführt Die jeweilige Röntgenröhrenhochspannung kann von einer Anzeigeeinrichtung 13 angezeigt werden.In FIG. 1 shows an X-ray tube t which is fed by an X-ray generator 2. For measurement the X-ray tube high voltage is served by two radiation detectors 3 and 4 on their input sides for radiation through two X-ray filters 5 and 6 different absorption are covered. The output signals of the beam detectors 3 and 4 become A divider 9 is supplied via current-voltage converters 7 and 8. The output signal of the divider 9 at the output 10 represents a measure for the X-ray tube high voltage and is an analog-to-digital converter 11 supplied to the high voltage of the X-ray tube being measured The respective X-ray tube high voltage supplies corresponding digital information to the memory 12 can be displayed by a display device 13.
Aus der F i g. 2 geht für zwei Kupferfilter von 0,7 mm und 1,5 mm Dicke die Abhängigkeit des Ausgangssignales des Dividierers 9, d. h. des Dosisquotienten, von der Röntgenröhrenhochspannung hervor. Jeder Röntgenröhrenhochspannung ist demgemäß ein bestimmtes Ausgangssignal des Di^-idierers 9 zugeordnet Die Kurve ist im Speicher 12 abgespeichert. Während der Messung erfolgt ein Vergleich des Meßwertes mit den gespeicherten Eichwerten.From FIG. 2 shows the dependence of the output signal for two copper filters 0.7 mm and 1.5 mm thick of the divider 9, d. H. of the dose quotient, from the X-ray tube high voltage. Any x-ray tube high voltage is accordingly assigned a certain output signal of the divider 9 The curve is stored in memory 12. During the measurement, the measured value is compared with the stored value Calibration values.
Die Filter 5 und 6 müssen zur Erzielung einwandfreier Meßergebnisse der jeweils gegebenen Röntgenröhrenhochspannung
ungefähr angepaßt sein. Dies ist deshalb erforderlich, damit der vom Dividierer 9 gebildete Dosisquotient
nur noch von der Röntgenröhrenhochspannung abhängt. Da man aber in der Regel die Röntgenröhrenhochspannung
ungefähr kennt, ist es möglich, die jeweils geeignete Filterkombination auszuwählen.
Die linke Kurve in Fig. 2 gilt für e.'nen 6-Puls-Röntgengenerator
und die rechte Kurve in Fig.2 gilt für einen 12-Puls-Röntgengenerator.The filters 5 and 6 must be approximately adapted to the given X-ray tube high voltage in order to achieve perfect measurement results. This is necessary so that the dose quotient formed by the divider 9 only depends on the high voltage of the X-ray tube. However, since the X-ray tube high voltage is generally known roughly, it is possible to select the appropriate filter combination in each case.
The left curve in FIG. 2 applies to a 6-pulse X-ray generator and the right curve in FIG. 2 applies to a 12-pulse X-ray generator.
Ui mu für bestimmte Hochspan-Ui mu for certain high voltage
nungsbereicheYjeweils ein bestimmtes Filterpaar verwendet.w·» wirdA specific pair of filters is used in each case. will
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung gemäß dem Oberbegriff des Patentanspruches so auszubilden, daß mit geringem Aufwand bei einer gegebenen Filterkombination innerhalb eines weiten Hochspannungsbereiches eine Bestimmung der Röntgenröhrenhochspannung erfolgt.The invention is based on the object of a device according to the preamble of the patent claim to be trained so that with little effort for a given filter combination within a wide In the high voltage range, the X-ray tube high voltage is determined.
Diese Aufgabe ist erfindungsgemäß durch die im Kennzeichen des Patentanspruches angegebene Ausbildung gelöst. Bei der erfindungsgemäßen Vorrichtung ist der Quotient der beiden unterschiedlichen Ausgangssignale der Strahlendetektoren ein Maß für die jeweilige Röntgenröhrenhochspannung. Seine Abhängigkeit von der Röntgenröhrenhochspannung ist als Kurve im Speicher abgespeichert. Diese Kurve folgt in der Regel keiner geschlossenen mathematischen Funktion und kann genauer empirisch ermittelt werden, was hinsichtlich der Genauigkeit der Messung und der Anpassungsmöglichkeit an verschiedene Generatoren von Vorteil ist. Auch die Welligkeit der tatsächlich an der Röntgenröhre liegenden Hochspannung und die Vorfilterung an der Röntgenröhre haben bei passender Filierwahl auf das Meßergebnis keinen Einfluß.According to the invention, this object is achieved by the training indicated in the characterizing part of the patent claim solved. In the device according to the invention is the quotient of the two different output signals the radiation detectors a measure for the respective X-ray tube high voltage. Its dependence on the X-ray tube high voltage is stored as a curve in the memory. As a rule, this curve does not follow one closed mathematical function and can be empirically determined more precisely what with regard to the accuracy of the measurement and the ability to adapt to different generators is an advantage. Also the ripple actually on the X-ray tube lying high voltage and the pre-filtering on the X-ray tube have a suitable filter choice on the Measurement result no influence.
Die Erfindung ist nachfolgend anhand eines in der Hierzu 1 Blatt ZeichnungenThe invention is based on one in the 1 sheet of drawings
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803014879 DE3014879C2 (en) | 1980-04-17 | 1980-04-17 | Device for measuring the X-ray tube high voltage in an X-ray diagnostic system |
| FR8101471A FR2481045A1 (en) | 1980-04-17 | 1981-01-27 | HT measuring appts. for radiographic X=ray tube - has two radiation detectors covered by filters of differing absorption coefficients and feeding divider circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803014879 DE3014879C2 (en) | 1980-04-17 | 1980-04-17 | Device for measuring the X-ray tube high voltage in an X-ray diagnostic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3014879A1 DE3014879A1 (en) | 1982-01-28 |
| DE3014879C2 true DE3014879C2 (en) | 1985-11-14 |
Family
ID=6100339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803014879 Expired DE3014879C2 (en) | 1980-04-17 | 1980-04-17 | Device for measuring the X-ray tube high voltage in an X-ray diagnostic system |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3014879C2 (en) |
| FR (1) | FR2481045A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3562062D1 (en) * | 1984-06-29 | 1988-05-05 | Siemens Ag | X-ray diagnostic apparatus with a regulating device for the x-ray tube high voltage supply |
| DE3929013A1 (en) * | 1989-09-01 | 1991-03-07 | Philips Patentverwaltung | Determining filtering of X=ray source - using intensity measurement after passing X=rays through three analysis filters of selected absorption |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4189645A (en) * | 1978-06-28 | 1980-02-19 | Advanced Instrument Development, Inc. | X-ray measuring system |
| DE2846458A1 (en) * | 1978-10-25 | 1980-05-08 | Siemens Ag | X-RAY DIAGNOSTIC GENERATOR WITH A HIGH-VOLTAGE TRANSFORMER |
-
1980
- 1980-04-17 DE DE19803014879 patent/DE3014879C2/en not_active Expired
-
1981
- 1981-01-27 FR FR8101471A patent/FR2481045A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2481045A1 (en) | 1981-10-23 |
| FR2481045B1 (en) | 1985-03-01 |
| DE3014879A1 (en) | 1982-01-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| AG | Has addition no. |
Ref country code: DE Ref document number: 3114699 Format of ref document f/p: P |
|
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8365 | Fully valid after opposition proceedings | ||
| 8380 | Miscellaneous part iii |
Free format text: SP. 1, Z. 41 NACH DEM WORT "FORMEL" EINEN "PUNKT" SETZEN DEN HALBSATZ BIS EINSCHLISSLICH ZEILE 43 "MUSS" STREICHEN SP. 1, Z. 43-45 LAUTET RICHTIG: FUER BESTIMMTE HOCHSPANNUNGSBEREICHE WIRD JEWEILS EIN BESTIMMTES FILTERPAAR VERWENDET. |
|
| 8320 | Willingness to grant licences declared (paragraph 23) |