Radiographic image capturing device, method for detecting radiation doses, and computer readable storage medium

Patent metadata

Field	Value
Publication number	US-9833214-B2
Application number	US-201514620208-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Sep 28, 2012
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A radiographic image capturing device includes: plural radiation dose detection pixels that respectively output signal values according to a dose of irradiated radiation; a determination unit that determines a presence or absence of defects, block-by-block, based on signal values of radiation dose detection pixels included in each of plural blocks, which are arranged such that the respective blocks include at least a portion of the plural radiation dose detection pixels; a block rearrangement unit that performs block rearrangement to change the arrangement of the plural blocks according to a determination result of the determination unit; and a detection unit that detects a dose of irradiated radiation based on signal values of each arranged block or of each rearranged block.

First claim

What is claimed is:

1. A radiographic image capturing device comprising:
a plurality of radiation dose detection pixels that respectively output signal values according to a dose of irradiated radiation;
a determination unit that determines a presence or absence of defects, block-by-block, based on signal values of radiation dose detection pixels included in each of a plurality of blocks, which are arranged such that the respective blocks include at least a portion of the plurality of radiation dose detection pixels;
a block rearrangement unit that performs block rearrangement to change the arrangement of the plurality of blocks according to a determination result of the determination unit; and
a detection unit that detects a dose of irradiated radiation based on signal values of each arranged block or of each rearranged block.

2. The radiographic image capturing device of claim 1 , wherein the block rearrangement unit performs block rearrangement to change the arrangement of the plurality of blocks based on instruction input supplied in a case in which the determination unit has determined that a defect is present in any of the plurality of blocks.

3. The radiographic image capturing device of claim 1 , wherein the block rearrangement unit changes a block size of each of the plurality of blocks.

4. The radiographic image capturing device of claim 1 , wherein the block rearrangement unit moves inter-block boundaries defining each of the plurality of blocks, while maintaining a block size of each of the plurality of blocks.

5. The radiographic image capturing device of claim 1 , further comprising:
a buffer region including a plurality of radiation dose detection pixels that are capable of configuring a portion of any block rearranged by the block rearrangement unit.

6. The radiographic image capturing device of claim 5 , wherein the buffer region is provided at an outer periphery of a block group made up of the plurality of blocks.

7. The radiographic image capturing device of claim 1 , further comprising:
imaging pixels that output signal values according to doses of irradiated radiation to capture a radiographic image; and
an identification unit that identifies an imaging target site to be imaged by the imaging pixels,
wherein each of the plurality of blocks has a block size according to the imaging target site identified by the identification unit.

8. The radiographic image capturing device of claim 1 , further comprising:
a notification unit that notifies a placement of a defective block which has been determined to have a defect by the determination unit, or a placement of a normal block other than the defective block.

9. The radiographic image capturing device of claim 1 , wherein the detection unit detects doses of irradiated radiation based only on signal values of normal blocks other than defective blocks which have been determined to have a defect by the determination unit.

10. The radiographic image capturing device of claim 1 , further comprising:
a correction unit that corrects a signal value of a defective block which has been determined to have a defect by the determination unit, using a signal value of a normal block adjacent to the defective block.

11. A non-transitory computer readable storage medium storing a program that causes a computer to function as the determination unit, the block rearrangement unit, and the detection unit of the radiographic image capturing device of claim 1 .

12. A method for detecting radiation doses, comprising:
determining a presence or absence of defects, block-by-block, based on signal values of radiation dose detection pixels included in each of a plurality of blocks, which are arranged such that the respective blocks include at least a portion of a plurality of radiation dose detection pixels that respectively output signal values according to a dose of irradiated radiation;
performing block rearrangement to change the arrangement of the plurality of blocks in a case in which a defect is determined to be present in any of the plurality of blocks; and
detecting a dose of irradiated radiation based on signal values of each arranged block or of each rearranged block.

Assignees

• Fujifilm Corp

Inventors

• Imamura Ryou

Classifications

• G06T7/0012

  Biomedical image inspection · CPC title

• A61B2560/0276

  Determining malfunction · CPC title

• A61B2562/046

  in a matrix array · CPC title

• H01L27/14607

  Electricity · mapped topic

• H01L27/14605

  Electricity · mapped topic