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Energy measuring method and device

A technology of energy measurement and energy, applied in the field of gamma cameras, can solve problems such as insufficient solutions

Inactive Publication Date: 2004-07-07
HAMAMATSU PHOTONICS KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These high count rate problems can be prevented to a certain extent with the existing accumulation correction method, but the solution is not sufficient

Method used

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  • Energy measuring method and device
  • Energy measuring method and device
  • Energy measuring method and device

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Embodiment Construction

[0043] The preferred embodiments of the energy measuring method and measuring device according to the present invention will be described in detail below with reference to the accompanying drawings. In addition, in the description of the drawings, the same reference numerals are assigned to the same components, and overlapping descriptions are omitted.

[0044] First, as the signal pulse of the measurement object in the energy measurement method and the measurement device according to the present invention, a figure 1 , Figure 2A and Figure 2B The time waveform diagram is shown to illustrate the signal pulse output by the scintillation detector used in the radiation detector as the detection signal.

[0045] figure 1 It is a schematic diagram showing an example of the pulse waveform, that is, the time waveform (current signal waveform) of the signal intensity, of the signal pulse output by the scintillation detector corresponding to the radiation detection. In this figur...

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Abstract

The energy E of a signal pulse P inputted to an energy measurement apparatus 1 for measurement, and corresponding to the total integrated intensity, is calculated in an energy calculation unit 10 from the integrated signal intensity Q acquired by a gate integrator 32 , and from the pulse interval T measured by a pulse interval measurement unit 23 . At this time, pileup correction is performed using at least one of the integrated signal intensity or the energy, and the pulse interval of the signal pulse inputted prior to the signal pulse for measurement. By this means, the correct energy E, with the effect of pileup eliminated, can be determined with good precision. Hence a method and apparatus for energy measurement are realized which enable correct and precise measurement of the energy of individual signal pulses, even when the pulse interval between signal pulses is short.

Description

technical field [0001] The present invention relates to an energy measuring method and a measuring device for measuring the signal pulse energy by integrating the signal intensity of the pulse waveform of the input signal pulse. The present invention is not only applied to energy measurement and dose measurement of radiation, but also widely used in the measurement of radiation detection position information and radiation images, etc., and is especially applied to gamma cameras and SPECT (single photon emission computed tomography, single photon emission computed tomography) for nuclear medicine diagnosis. Photon emission computed tomography) apparatus, PET (positron emission tomography, positron emission tomography) apparatus, and the like. Background technique [0002] When measuring radiation (energy rays) such as γ-rays and charged particles, a radiation detector such as a scintillation detector using a scintillator can be used to detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/161G01D1/04G01R21/00G01T1/164G01T1/17G01T1/36
CPCG01D1/04G01T1/171
Inventor 田中荣一大村知秀
Owner HAMAMATSU PHOTONICS KK