Radiation image detection apparatus and radiation image photographing system

• US 7,807,976 B2
• Filed: 02/27/2009
• Issued: 10/05/2010
• Est. Priority Date: 02/29/2008
• Status: Expired due to Fees

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Nishino, Naoyuki, Ohta, Yasunori
• Primary Examiner(s): Hannaher; Constantine
• Application Number:
  US12/379,751
• Publication Number:
  US 20090220048A1
• Time in Patent Office: 585 Days
• Field of Search: 250/370.09
• US Class Current: 250/370.09
• 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 6/4464 the source unit or the detector unit being mounted to ceiling
• CPC Class Codes: A61B 6/56 Details of data transmission or power supply, e.g. use of slip rings
• CPC Class Codes: A61B 6/563 involving image data transmission via a network

Abstract

In a radiation image detection apparatus for reading out a radiation image signal from the radiation detection unit that detects radiation transmitted through a subject and outputting the radiation image signal as a radio communication signal, the carrier frequency of the radio communication signal is made lower during a reading period in which the radiation image signal is being read out by the read out unit than the carrier frequency of the radio communication signal at a time other than the reading period.

Claims

1. A radiation image detection apparatus, comprising a radiation detection unit that generates a charge by receiving radiation transmitted through a subject to detect a radiation image of the subject, a readout unit that reads out a radiation image signal representing the radiation image from the radiation detection unit, and a radio communication unit that outputs a radiation image signal read out from the readout unit as a radio communication signal,

wherein the radio communication unit is a unit that causes the carrier frequency of the radio communication signal to become lower during a reading period in which the radiation image signal is being read out by the readout unit than the carrier frequency of the radio communication signal at a time other than during the reading period.

2. The radiation image detection apparatus as claimed in claim 1, wherein the reading period is a period in which a motion image of the subject is being detected by the radiation detection unit.

3. The radiation image detection apparatus as claimed in claim 2, wherein the radio communication unit is a unit that outputs a signal other than the radiation image signal as a radio communication signal, and causes the carrier frequency of the radio communication signal to become lower for the signal other than the radiation image signal than the carrier frequency of the radio communication signal for the radiation image signal during the reading period.

4. The radiation image detection apparatus as claimed in claim 1, wherein the radio communication unit is a unit that outputs a signal other than the radiation image signal as a radio communication signal, and causes the carrier frequency of the radio communication signal to become lower for the signal other than the radiation image signal than the carrier frequency of the radio communication signal for the radiation image signal during the reading period.

5. A radiation image photographing system, comprising:

a radiation image detection apparatus having a radiation detection unit that generates a charge by receiving radiation transmitted through a subject to detect a radiation image of the subject, a readout unit that reads out a radiation image signal representing the radiation image from the radiation detection unit, and a radio communication unit that outputs a radiation image signal read out from the readout unit as a radio communication signal; and

a photographing control apparatus that outputs at least one of a signal indicating still image photographing, a signal indicating preview image photographing, and a signal indicating motion image photographing to the radiation image detection apparatus, wherein;

the radiation image detection apparatus includes a photographing mode signal receiving unit that receives the signal outputted from the photographing control apparatus; and

the radio communication unit is a unit that causes the carrier frequency of the radio communication signal to become lower, when the signal indicating preview image photographing or the signal indicating motion image photographing is received, than the carrier frequency of the radio communication signal when the signal indicating still image photographing is received.