Radiation imaging apparatus

• US 20090087073A1
• Filed: 09/29/2008
• Published: 04/02/2009
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Kito, Eiichi, Yoshimi, Takuya, Tanabe, Tsuyoshi, Ohta, Yasunori
• Granted Patent: US 8,229,202 B2
• Time in Patent Office: Days
• US Class Current: 382/132
• CPC Class Codes: A61B 6/00 Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161; apparatus for taking X-ray photographs G03B42/02
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4291 the detector being combined with a grid or grating
• CPC Class Codes: A61B 6/4488 Means for cooling A61B6/045 takes precedence
• CPC Class Codes: A61B 6/542 involving control of exposure
• CPC Class Codes: A61B 6/563 involving image data transmission via a network
• CPC Class Codes: Y10S 378/901 Computer tomography program or processor

Abstract

A radiation imaging apparatus reads out image signals from a radiation detecting section that detects radiation which has passed through a subject, and outputs the read out image signals as wireless signals. The signal strength of communications of a cassette transmitter/receiver is set to be lower during readout of the image signals than the signal strength of communications of the cassette transmitter/receiver at times other than during readout of image signals.

Claims

1. A radiation imaging apparatus, comprising:

a radiation detecting section that generates electric charges when irradiated with radiation which has passed through a subject, to record a radiation image of the subject;

a readout section that reads out image signals that represent the radiation image of the subject from the radiation detecting section; and

a wireless communicating section that reads out the image signals from the readout section and outputs the read out image signals as wireless signals;

the wireless communicating section decreasing the signal strength of communications during readout of the image signals by the readout section to be lower than the signal strength of communications at times other than during readout of image signals.

2. A radiation imaging system as defined in claim 1, wherein:

the wireless communicating section sets the signal strength of communications during readout of the image signals to a degree at which the wireless signals output from the wireless communicating section do not influence the image signals which are being read out.

3. A radiation imaging system as defined in claim 1, wherein the second wireless communicating section:

sets the signal strength of communications during readout of the image signals to a degree at which the wireless signals output from the wireless communicating section do not influence the image signals which are being read out;

decreases the signal strength of communications in a stepwise manner, to obtain a signal strength at a step which is greater than or equal to a minimum signal strength that enables communications between the radiation imaging apparatus and a receiving apparatus that receives the wireless signals; and

sets the obtained signal strength as the signal strength of communications during readout of the image signals;

while;

increasing the transfer rate of the wireless signals in a stepwise manner corresponding to the stepwise decrease of the signal strength; and

setting the transfer rate of the wireless signals to a speed corresponding to the obtained signal strength.

4. A radiation imaging apparatus, comprising:

a radiation detecting section that generates electric charges when irradiated with radiation which has passed through a subject, to record a radiation image of the subject;

a readout section that reads out image signals that represent the radiation image of the subject from the radiation detecting section; and

a wireless communicating section that reads out the image signals from the readout section and outputs the read out image signals as wireless signals;

the wireless communicating section decreasing the transfer rate of the wireless signals during readout of the image signals by the readout section to be lower than transfer rate of the wireless signals at times other than during readout of image signals.

5. A radiation imaging system as defined in claim 4, wherein:

the wireless communicating section sets the transfer rate of the wireless signals during readout of the image signals to a speed at which the wireless signals output from the wireless communicating section do not influence the image signals which are being read out.