Radiation detector noise reduction method and radiation detector

A radiation detecting section noise reduction method comprising the steps of:

• detecting incident radiation with a radiation detecting section, the radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• reading out the detection signal from the radiation detecting section through a readouting section;
• and
• correcting the readout detection signal,
• wherein the correction step includes
• the first sub-step of subtracting a result obtained by adding offset noise in the readouting section to the product of the detecting section offset noise and the readouting section gain noise from the detection signal,
• the second sub-step of multiplying a difference result obtained in the first sub-step by the reciprocal of the readouting section gain noise,
• the third sub-step of subtracting line artifact noise in the detecting section from the multiplication result obtained in the second sub-step, and
• the fourth sub-step of multiplying the difference result obtained in the third sub-step by the reciprocal of gain noise in the detecting section.

A radiation detecting section noise reduction method comprising the steps of:

• detecting incident radiation with a radiation detecting section, the radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• reading out the detection signal from the radiation detecting section through a readouting section;
• and
• correcting the readout detection signal,
• wherein the correction step includes
• the first sub-step of subtracting offset noise in the readouting section from the detection signal,
• the second sub-step of multiplying the difference result obtained in the first sub-step by gain noise in the readouting section,
• the third sub-step of subtracting offset noise in the detecting section from the multiplication result obtained in the second sub-step,
• the fourth sub-step of subtracting line artifact noise in the detecting section from the difference result obtained in the third sub-step, and
• the fifth sub-step of multiplying the difference result obtained in the fourth sub-step by gain noise in the detecting section.

A radiation detecting section noise reduction method comprising the steps of:

• detecting incident radiation with a radiation detecting section, the radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• reading out the detection signal from the radiation detecting section through a readouting section;
• and
• correcting the readout detection signal,
• wherein the correction step includes
• the first sub-step of subtracting a result obtained by adding offset noise in the readouting section to the product of offset noise in the detecting section and gain noise in the readouting section from the detection signal,
• the second sub-step of subtracting a value obtained by multiplying line artifact noise in the detecting section by the gain noise in the readouting section from the difference result obtained in the first sub-step, and
• the third sub-step of multiplying the difference result obtained in the second sub-step by the reciprocal of the product of gain noise in the detecting section and the gain noise in the readouting section.

A radiation detecting section noise reduction method comprising the steps of:

• detecting incident radiation with a radiation detecting section, the radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• reading out the detection signal from the radiation detecting section through a readouting section;
• and
• correcting the readout detection signal,
• wherein the correction step includes
• the first sub-step of multiplying the detection signal by the reciprocal of the readouting section gain noise,
• the second sub-step of subtracting a result obtained by adding the detecting section offset noise and a result obtained by multiplying the detection signal by the reciprocal of the readouting section gain noise from a result obtained in the first sub-step,
• the third sub-step of subtracting line artifact noise in the detecting section from the multiplication result obtained in the second sub-step, and
• the fourth sub-step of multiplying the difference result obtained in the third sub-step by the reciprocal of gain noise in the detecting section.

A radiation detector comprising:

• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out a detection signal detected by said radiation detecting section from said radiation detecting section, said readouting section having a plurality of readout schemes which can be selectively used;
• a storage section for storing correction values corresponding to the readout schemes in correspondence with the readout schemes;
• and
• a correction section for correcting the output detection signal on the basis of the correction value selectively read out from said storage section in accordance with the readout scheme.

A radiation detector comprising:

• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out the detection signal from said radiation detecting section;
• and
• a correction section for correcting the readout detection signal,
• wherein some of the plurality of pixels are substantially shielded against the radiation, and said correction section corrects signals from the pixels which are not shielded on the basis of signals from the shielded pixels.

A radiation detector comprising:

• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out the detection signal from said radiation detecting section;
• and
• a correction section for correcting the readout detection signal,
• wherein first pixels of the plurality of pixels which are located on one end, and second pixels thereof which are located on the other end are substantially shielded against the radiation, and said correction section corrects signals from the pixels which are not shielded on the basis of signals from said first and second pixels.

A radiation detector comprising:

• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out the detection signal from said radiation detecting section;
• and
• a plurality of switching elements for separating said readouting section from said radiation detecting section.

A radiation diagnostic system comprising

• a radiation generating unit;
• a radiation detector detecting a radiation through a subject from said radiation generating unit;
• a display unit displaying an image based on an output of said radiation detector;
• and
• a control unit controlling said radiation generating unit, said radiation detector and said display unit, wherein said radiation detector including:
• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out a detection signal detected by said radiation detecting section from said radiation detecting section, said readouting section having a plurality of readout schemes which can be selectively used;
• a storage section for storing correction values corresponding to the readout schemes in correspondence with the readout schemes;
• and
• a correction section for correcting the output detection signal on the basis of the correction value selectively read out from said storage section in accordance with the readout scheme.

A radiation diagnostic system comprising

• a radiation generating unit;
• a radiation detector detecting a radiation through a subject from said radiation generating unit;
• a display unit displaying an image based on an output of said radiation detector;
• and
• a control unit controlling said radiation generating unit, said radiation detector and said display unit, wherein said radiation detector including:
• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out the detection signal from said radiation detecting section;
• and
• a correction section for correcting the readout detection signal,
• wherein some of the plurality of pixels are substantially shielded against the radiation, and said correction section corrects signals from the pixels which are not shielded on the basis of signals from the shielded pixels.

A radiation diagnostic system comprising

• a radiation generating unit;
• a radiation detector detecting a radiation through a subject from said radiation generating unit;
• a display unit displaying an image based on an output of said radiation detector;
• and
• a control unit controlling said radiation generating unit, said radiation detector and said display unit, wherein said radiation detector including:
• a radiation detecting section for detecting incident radiation, said radiation detecting section having a plurality of pixels arrayed in the form of a matrix;
• a readouting section for reading out the detection signal from said radiation detecting section;
• and
• a plurality of switching elements for separating said readouting section from said radiation detecting section.