Radiographic image capturing apparatus, radiographic image capturing system, and method of supplying electric power to radiographic image capturing apparatus

• US 9,168,016 B2
• Filed: 01/28/2011
• Issued: 10/27/2015
• Est. Priority Date: 01/29/2010
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Ohta, Yasunori, Nishino, Naoyuki, Nakatsugawa, Haruyasu
• Primary Examiner(s): Ho, Allen C.
• Application Number:
  US12/929,499
• Publication Number:
  US 20110186741A1
• Time in Patent Office: 1,733 Days
• Field of Search: 378/91, 378/98.8, 378/101, 378/102, 378/115, 378/116, 378/117, 378/189, 250/370.09
• US Class Current: 1/1
• CPC Class Codes: A61B 6/42 Arrangements for detecting radiation specially adapted for radiation diagnosis
• CPC Class Codes: A61B 6/4208 characterised by using a particular type of detector
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4283 characterised by a detector unit being housed in a cassette
• CPC Class Codes: A61B 6/44 Constructional features of apparatus for radiation diagnosis
• CPC Class Codes: A61B 6/4405 the apparatus being movable or portable, e.g. handheld or mounted on a trolley
• CPC Class Codes: A61B 6/4429 related to the mounting of source units and detector units
• CPC Class Codes: A61B 6/4452 the source unit and the detector unit being able to move relative to each other
• CPC Class Codes: A61B 6/4494 Means for identifying the diagnostic device
• CPC Class Codes: A61B 6/54 Control of apparatus or devices for radiation diagnosis
• CPC Class Codes: A61B 6/542 involving control of exposure
• CPC Class Codes: A61B 6/548 Remote control of the apparatus or devices
• CPC Class Codes: A61B 6/56 Details of data transmission or power supply, e.g. use of slip rings
• CPC Class Codes: G01T 1/24 with semiconductor detectors
• CPC Class Codes: H05G 1/10 Power supply arrangements for feeding the X-ray tube supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623
• CPC Class Codes: H05G 1/26 Measuring, controlling or protecting measuring X-ray radiation G01T
• CPC Class Codes: H05G 1/265 Measurements of current, voltage or power
• CPC Class Codes: H05G 1/30 Controlling
• CPC Class Codes: H05G 1/32 Supply voltage of the X-ray apparatus or tube

Abstract

A radiographic image capturing apparatus has a radiation source device including a radiation source for outputting radiation, and a detector device including a radiation detector for detecting radiation that is transmitted through a subject when the subject is irradiated with radiation by the radiation source, and converting the detected radiation into a radiographic image. At least one of the radiation source device and the detector device has an electric power supply limiting unit for limiting supply of electric power, and the electric power supply limiting unit controls supply of electric power between the radiation source device and the detector device, depending on timing of an image capturing process.

Claims

1. A portable radiographic image capturing apparatus comprising:

a radiation source device including an electric power storage unit and a radiation source for outputting radiation; and

a detector device including an electric power storage unit and a radiation detector for detecting radiation that is transmitted through a subject when the subject is irradiated with radiation by the radiation source, and converting the detected radiation into a radiographic image,

at least one of the radiation source device and the detector device having an electric power supply limiting unit for limiting supply of electric power,

the electric power supply limiting unit including;

an electric power controller that controls supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device; and

an electric power supply limiter that limits supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, depending on timing of an image capturing process,

wherein the electric power controller supplies electric power only along a route from the electric power storage unit of the detector device to the electric power storage unit of the radiation source device, based on the electric power supply request made before the image capturing process.

2. The portable radiographic image capturing apparatus according to claim 1, wherein at least one of the electric power storage unit of the radiation source device and the electric power storage unit of the detector device is a capacitor.

3. The portable radiographic image capturing apparatus according to claim 1, wherein the electric power supply limiting unit further comprises a pause processor that temporarily stops supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device from a start of the image capturing process after electric power has been supplied and until an electric power supply request is given before a next image capturing process.

4. The portable radiographic image capturing apparatus according to claim 1, wherein the electric power controller of the electric power supply limiting unit comprises an electric power manager for managing electric power required to capture a given number of radiographic images,

wherein the electric power manager supplies electric power from one of the radiation source device and the detector device, which has excessive electric power with respect to the required electric power, to the other of the radiation source device and the detector device, which has insufficient electric power with respect to the required electric power, up to the required electric power.

5. The portable radiographic image capturing apparatus according to claim 1, wherein the electric power supply limiter of the electric power supply limiting unit limits supply of the electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, during a period in which the radiographic image is being captured based on the radiation.

6. The portable radiographic image capturing apparatus according to claim 1, wherein the electric power supply limiting unit further comprises a pause processor that temporarily stops supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device after electric power has been supplied and until a next image capturing process is completed.

7. The portable radiographic image capturing apparatus according to claim 1, wherein the limitation of the supply of electric power by the electric power supply limiter is to deactivate supply of electric power by the electric power controller between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device.

8. The portable radiographic image capturing apparatus according to claim 1, wherein the limitation of the supply of electric power by the electric power supply limiter is to reduce an amount of electric power supplied per unit time by the electric power controller between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device.

9. The portable radiographic image capturing apparatus according to claim 1, wherein the limitation of the supply of electric power by the electric power supply limiter is to control supply of electric power in a stepwise manner by the electric power controller between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device.

10. The portable radiographic image capturing apparatus according to claim 1, wherein the electric power controller supplies electric power only along a route from the electric power storage unit of the radiation source device to the electric power storage unit of the detector device, based on an electric power supply request.

11. The portable radiographic image capturing apparatus according to claim 1, the radiation detector comprising:

a scintillator;

a photoelectric converter for absorbing light converted by the scintillator and generating a charge corresponding to the absorbed light; and

a signal output unit for outputting an electric signal that corresponds to radiographic image information, for the charge generated by the photoelectric converter,

wherein the photoelectric converter includes an organic photoconductor, and

the signal output unit includes a channel layer that comprises an organic semiconductor material.

12. A portable radiographic image capturing apparatus comprising:

a radiation source device including;

an electric power storage unit; and

a radiation source for outputting radiation; and

a detector device including;

an electric power storage unit; and

a radiation detector for detecting radiation that is transmitted through a subject when the subject is irradiated with radiation by the radiation source, and converting the detected radiation into a radiographic image,

wherein at least one of the radiation source device and the detector device has an electric power supply limiting unit for limiting supply of electric power,

the electric power supply limiting unit including;

an electric power controller that controls supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device; and

an electric power supply limiter that limits supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, depending on timing of an image capturing process,

wherein the electric power controller of the electric power supply limiting unit supplies electric power only along a route from the electric power storage unit of the detector device to the electric power storage unit of the radiation source device, upon completion of the image capturing process.

13. The portable radiographic image capturing apparatus according to claim 12, wherein the electric power controller of the electric power supply limiting unit comprises an electric power manager for managing electric power required to capture a given number of radiographic images, and

wherein the electric power manager supplies electric power from one of the radiation source device and the detector device, which has excessive electric power with respect to the required electric power, to the other of the radiation source device and the detector device, which has insufficient electric power with respect to the required electric power, up to the required electric power.

14. The portable radiographic image capturing apparatus according to claim 12, wherein the electric power supply limiter of the electric power supply limiting unit limits supply of the electric power between the radiation source device and the detector device, during a period in which the radiographic image is being captured based on the radiation.

15. A portable radiographic image capturing apparatus comprising:

a radiation source device including;

an electric power storage unit; and

a radiation source for outputting radiation; and

a detector device including;

an electric power storage unit; and

a radiation detector for detecting radiation that is transmitted through a subject when the subject is irradiated with radiation by the radiation source, and converting the detected radiation into a radiographic image,

wherein at least one of the radiation source device and the detector device has an electric power supply limiting unit for limiting supply of electric power,

the electric power supply limiting unit including;

an electric power controller that controls supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device; and

an electric power supply limiter that limits supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, depending on timing of an image capturing process,

wherein the electric power controller supplies electric power only along a route from the electric power storage unit of the detector device to the electric power storage unit of the radiation source device, based on an electric power supply request.

16. A radiographic image capturing system comprising:

a radiation source device including an electric power storage unit and a radiation source for outputting radiation;

a detector device including an electric power storage unit and a radiation detector for detecting radiation that is transmitted through a subject when the subject is irradiated with radiation by the radiation source, and converting the detected radiation into a radiographic image; and

an electric power supply limiting unit,

wherein the electric power supply limiting unit includes;

an electric power controller that controls supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device; and

an electric power supply limiter that limits supply of electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, depending on timing of an image capturing process,

wherein the electric power controller supplies electric power only along a route from the electric power storage unit of the detector device to the electric power storage unit of the radiation source device, based on the electric power supply request made before the image capturing process.

17. The radiographic image capturing system according to claim 16, wherein the electric power controller of the electric power supply limiting unit supplies electric power between the electric power storage unit of the radiation source device and the electric power storage unit of the detector device, upon completion of the image capturing process.