Imaging apparatus, imaging system, and method for controlling imaging apparatus
An imaging device and imaging technology, which are used in exposure control, instruments for radiological diagnosis, medical science, etc., can solve problems such as shortening the exposure preparation period, increasing image artifacts, and inability to perform imaging.
Inactive Publication Date: 2012-07-04
CANON KK
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Problems solved by technology
[0007] The offset correction discussed in U.S. Patent No. 6,115,451 does not satisfactorily deal with the variation in offset discussed in U.S. Patent No. 6,448,561, and image artifacts can be increased
[0008] On the other hand, the method discussed in U.S. Patent No. 6,448,561 cannot perform imaging until the offset is stabilized after bias is applied to the photoelectric conversion element, so that the method cannot meet the requirement of shortening the exposure preparation period.
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[0026] Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the accompanying drawings.
[0027] The radiation in the present invention includes not only α-rays, β-rays, and γ-rays, which are beams made of particles (particles) (including photons) emitted by radioactive decay, but also beams with energy equivalent thereto, For example, X-rays, particle beams and cosmic radiation.
[0028] figure 1 The imaging system of this exemplary embodiment shown includes an imaging device 100 , a control computer 108 , an imaging condition memory 109 , a radiation generating device 110 , a console 111 , and a display device 112 .
[0029] The imaging device 100 includes a flat panel detector (FPD) 104 including a detection unit 101 having a plurality of pixels that converts radiation or light into an electric signal, a drive circuit 102 that drives the detection unit 101, and an output The electrical signal output from ...
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The invention relates to an imaging apparatus, an imaging system and a method for controlling imaging apparatus. The imaging apparatus includes a detector in which a plurality of pixels are arranged in a matrix; each pixel includes a conversion element that converts radiation or light into an electric charge. The detector performs an exposure imaging operation for outputting exposure image data, a correction imaging operation for outputting correction image data, and a correction imaging preparation operation including an initialization operation for initializing the conversion element between the exposure imaging operation and the correction imaging operation. A correction unit corrects the exposure image data using the correction image data; and a control unit controls the operation of the detector so that the detector performs the initialization operation based on an amount of variation in offset of the conversion element at the time of transitioning from an exposure imaging preparation operation to the exposure imaging operation.
Description
technical field [0001] The present invention relates to an imaging device, an imaging system and a control method of the imaging device. More specifically, the present invention relates to an imaging device and a control method of the imaging device for a radiation imaging device and a radiation imaging system preferably used for static imaging and general imaging such as in medical diagnosis Motion imaging such as radioscopic imaging. Background technique [0002] In recent years, as an imaging device for X-ray medical image diagnosis and X-ray non-destructive inspection, a radiation imaging device using a flat panel detector (FPD) formed of a semiconductor material has been put into practical use. For example, such radiation imaging devices have been used in medical image diagnosis as digital imaging devices for static imaging such as general imaging and for moving imaging such as X-ray fluoroscopy imaging. [0003] US Patent No. 6115451 discusses a radiation imaging app...
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IPC IPC(8): A61B6/00
CPCG03B7/08G03B42/02
Inventor 佐藤翔远藤忠夫龟岛登志男八木朋之竹中克郎横山啓吾岩下贵司
Owner CANON KK