Hamamatsu-photonics K.k.

Hamanatsu Photonics K.k.

Tadashi Maruno

Toshiyasu Suyama

Takafumi Higuchi

Eiji Toda

Teruo Takahashi

Shinji Takihi

Mao Nakajima

Toshihide Sasaki

Junichi Sonoda

Motohiro Suyama

Takayuki Inoue

Fumio Iwase

Motoyuki Watanabe

Hirohiko Watanabe

Shogo Ema

Naotaka Hakamata

A photon counting device includes a plurality of pixels each including a photoelectric conversion element configured to convert input light to charge, and an amplifier configured to amplify the charge converted by the photoelectric conversion element and convert the charge to a voltage, an A/D converter configured to convert the voltage output from the amplifier of each of the plurality of pixels to a digital value and output the digital value, a correction unit configured to correct the digital value output from the A/D converter so that an influence of a variation in a gain and an offset value among the plurality of pixels is curbed, a calculation unit configured to output a summed value obtained by summing the corrected digital values corresponding to at least two pixels, and a conversion unit configured to convert the summed value output from the calculation unit to a number of photons.

Photon counting device and photon counting method

A photon counting device includes a plurality of pixels each including a photoelectric conversion element configured to convert input light to charge, and an amplifier configured to amplify the charge converted by the photoelectric conversion element and convert the charge to a voltage, an A/D converter configured to convert the voltages output from the amplifiers of the plurality of pixels to digital values; and a conversion unit configured to convert the digital value output from the A/D converter to the number of photons by referring to reference data, for each of the plurality of pixels, and the reference data is created based on a gain and an offset value for each of the plurality of pixels.

A radiation image acquiring system is provided. An X-ray image acquiring system irradiates X-rays to a subject from an X-ray source, and detects X-rays transmitted through the subject. The X-ray image acquiring system includes a first detector for detecting X-rays that are transmitted through the subject to generate first image data, a second detector arranged in parallel to the first detector with a dead zone region sandwiched therebetween, for detecting X-rays that are transmitted through the subject to generate second image data, and a timing control section for controlling detection timing of the second detector based on a dead zone width of the dead zone region so that first image data to be generated by the first detector and second image data to be generated by the second detector mutually correspond.

Radiation detection device, radiation image acquiring system, radiation inspection system, and radiation detection method

An X-ray image acquiring system capable of improving the detection accuracy of a foreign substance contained in a subject is provided. An X-ray image acquiring system irradiates X-rays to a subject having a predetermined thickness from an X-ray source, and detects X-rays transmitted through the subject in a plurality of energy ranges. The X-ray image acquiring system includes a low-energy detector for detecting, in a low-energy range, X-rays having been transmitted through a region Rextending in a thickness direction within the subject, a high-energy detector for detecting, in a high-energy range, X-rays having been transmitted through a region Rextending in a thickness direction within the subject, and a timing control section for controlling detection timing of X-rays in the low-energy detector and the high-energy detector so that an inspecting region located at a predetermined site within the subject is included in the region Rand the region R

Radiation detection device, radiation image acquiring system, and method for detecting radiation

An X-ray image acquiring system capable of improving the detection accuracy of a foreign substance contained in a subject is provided. An X-ray image acquiring systemirradiates X-rays to a subject S having a predetermined thickness W from an X-ray source, and detects X-rays transmitted through the subject S in a plurality of energy ranges. The X-ray image acquiring systemincludes a low-energy detectorfor detecting, in a low-energy range, X-rays having been transmitted through a region Rextending in a thickness direction within the subject S, a high-energy detectorfor detecting, in a high-energy range, X-rays having been transmitted through a region Rextending in a thickness direction within the subject S, and a timing control sectionfor controlling detection timing of X-rays in the low-energy detectorand the high-energy detectorso that an inspecting region E located at a predetermined site within the subject S is included in the region Rand the region R

A radiation image acquiring system that improves the detection accuracy of a foreign substance etc., in a subject is provided. An X-ray image acquiring systemirradiates X-rays to a subject S from an X-ray source, and detects X-rays in a plurality of energy ranges transmitted through the subject S. The X-ray image acquiring systemincludes a low-energy detectorfor detecting X-rays in a low-energy range that is transmitted through the subject S to generate low-energy image data, a high-energy detectorarranged in parallel to the low-energy detectorwith a dead zone regionsandwiched therebetween, for detecting X-rays in a high-energy range that is transmitted through the subject S to generate high-energy image data, and a timing control sectionfor controlling detection timing of the high-energy detectorbased on a dead zone width NW of the dead zone regionso that low-energy image data to be generated by the low-energy detectorand high-energy image data to be generated by the high-energy detectormutually correspond.

A fluorescence correlation spectroscopy analyzeris equipped with an excitation light illuminating optical system, a fluorescence imaging optical system, a CCD camera, and a data analyzer. The excitation light illuminating optical systemilluminates excitation light onto a predetermined region of a measured sample S. The fluorescence imaging optical systemimages the fluorescence generated at the measured sample S onto the photodetection surface of the CCD camera. The CCD cameraperforms photoelectric conversion of the fluorescence made incident onto the photodetection surface in accordance with the respective pixels and outputs the charges generated by the photoelectric conversion as detection signals from an output terminal. The data analyzerinputs the detection signals based on the charges generated at the pixels, and computes autocorrelation functions of the input detection signals according to each pixel.

Image pickup device including photodetection surface and transfer control arrangement

Fluorescent correalated spectrometric analysis device

In order to provide an imaging apparatus that uses an electron-bombarded multiplying tube with an internal solid imaging device with a long life, improved S/N ratio, high resolution, and moreover high sensitivity, an electron-bombarded multiplying tube with a photocathode and a back-illuminated FT-CCD sealed in a vacuum vessel is used as an imaging element. The vacuum vessel is made from a faceplate , a ceramic tube , and a ceramic stem . The photocathode emits photo-electrons from a surface opposite from the incidence plane, in accordance with incident light. The FT-CCD has an incidence plane disposed in the pathway of photo-electrons from the opposite surface. An imaging portion of the FT-CCD has pixels in the vertical direction in the same number as or in greater numbers than the number of output scan lines. A transfer electrode of the imaging portion is constantly applied with a negative voltage during an image accumulation period. By this, dark current can be controlled, the S/N ratio can be improved, resolution can be maintained, and sensitivity can be improved.

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Hamamatsu, Japan

Tadashi Maruno