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| 20100320389 | RADIATION DETECTOR AND TOMOGRAPHIC EQUIPMENT PROVIDED WITH THE SAME - A radiation detector according to this invention has a first reflector frame and a second reflector frame. Each of scintillation counter crystals is inserted in a direction through the first reflector frame and the second reflector frame, whereby two or more scintillation counter crystals are arranged in a first direction and a second direction to form a scintillation counter crystal layer. A position of the first reflector frame provided in the scintillation counter crystal layer differs from a position of the second reflector frame provided in the scintillation counter crystal layer. With such construction, the radiation detector may be provided of significantly suppressed manufacturing costs without reducing spatial resolution and detecting sensitivity. | 12-23-2010 |
| 20110018603 | SPURIOUS PULSE GENERATOR - According to a spurious pulse generator of this invention, integrating circuits are provided at a plurality of stages for carrying out integrating operations about time and outputting a spurious pulse, the integrating circuits being constructed to input a voltage value for controlling a crest value which is a peak swing of the spurious pulse to an amplifier forming an integrating circuit at a most upstream stage when a switching element is ON, and to input a constant voltage value when the switching element is OFF. As a result, the voltage value before ON-state and after ON-state of the switching element does not change but remains a constant voltage value, thereby obtaining a desired spurious pulse. | 01-27-2011 |
| 20110089989 | LIMITER CIRCUIT - The limiter circuit of this invention is a limiter circuit which, by switching action of a pair of transistors, allows passage of only signal voltage components of an input signal voltage included in ranges of an upper limit signal voltage and a lower limit signal voltage. With this construction, the pair of transistors carry out comparisons between the input signal voltage and threshold signal voltages and line switching at the same time. Therefore, there is no influence of propagation delay speed, and no switching noise occurs at times of line switching. Since diodes are not used, a high-speed limiter circuit can be manufactured. | 04-21-2011 |
| Patent application number | Description | Published |
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| 20090242774 | RADIATION DETECTOR - A problem of local pin-hole defects generated in avalanche multiplication is avoided. Before an anode and a cathode are assembled as a light receiving element, a position of a pin-hole defect is specified by a vacuum container for specifying a defect position having a previously prepared field emission array for inspection. If the cathode is a field emission array when the anode and cathode are assembled as a light receiving element, the anode and cathode are assembled such that a field emission chip corresponding to the position of the pin-hole defect does not discharge an electron beam to the field emission array serving as an actual detector. | 10-01-2009 |
| 20100027866 | POSITRON CT APPARATUS - A positron CT apparatus of this invention includes a first detecting device and a first image processing device for acquiring a 3D image of a first site of interest. Further, a second detecting device and a second image processing device are provided for acquiring a real planar image of the first site of interest and a second site of interest. A calculated planar image calculating device calculates, based on the 3D image, data corresponding only to the first site of interest projected to the real planar image. A correcting device provides a corrected planar image corresponding only to the second site of interest by subtracting the calculated planar image from the real planar image. Thus, the 3D image corresponding to the first site of interest and the corrected planar image with a projection of the second site of interest can be acquired at the same time through one diagnosis. | 02-04-2010 |
| 20100127179 | NUCLEAR MEDICAL DIAGNOSTIC DEVICE - Parameters T | 05-27-2010 |
| 20100237251 | RADIATION DETECTOR - A thin radiation detector with a high sensitivity is described. The radiation detector has light receiving elements receiving lights emitted by scintillators, performs a photoelectric conversion by using an avalanche multiplication film formed by amorphous selenium, and reads signals by using electron beams constantly discharged from a plurality of electron beam emitting sources called as a field emission array. The avalanche multiplication film formed by amorphous selenium is quite thin and has a simple structure, so it can be formed compactly and realized at a low cost. In addition, a signal amplification degree is approximately 1000 times, so an expensive low noise amplifier or a dedicated temperature adjusting mechanism is not required, and a quantum efficiency is sufficient for a wavelength of 300˜400 nm. | 09-23-2010 |
| 20100294944 | RADIATION DETECTOR - A radiation detector of this invention includes a pulse width modulation circuit for binarizing an analog electrical pulse outputted from a detector cell with a predetermined threshold, and modulating it into a digital electrical pulse, and a data superposer for outputting an incident position pulse train by superposing incident position pulses and concerning the position of the detector cell on which the radiation has fallen, and the digital electrical pulse detected by the radiation. Thus, position information which has conventionally been added after output of digital electrical pulse can be added into the digital electrical pulse. Therefore, compared with the conventional technique of adding position information after digital electrical pulse and transmitting the position information, the position of the radiation incident on the detector cell can be detected in a short time. | 11-25-2010 |
| 20100322379 | DETECTOR UNIT FOR MAMMOGRAPHY, AND A NUCLEAR MEDICINE DIAGNOSTIC APPARATUS FOR MAMMOGRAPHY HAVING THE SAME - A detector unit for mammography of this invention includes a gamma-ray detector having a configuration with a cutout formed in part of a closed curve, a hollow portion thereof providing a field of view. The gamma-ray detector can easily be placed in a position where a breast and breast peripheries of a patient enter the field of view at the same time, by fitting sites of the patient not to be examined, such as a top of an arm and a shoulder, in the cutout. This allows breast tissues present in the breast and breast peripheries to be diagnosed at the same time. | 12-23-2010 |
