2. ABILITY EVALUATION AND IMAGING OF A SCINTI-CAMERA (41th Annual Meeting)

Abstract

Following 4 items were investigated for standardization of the ability and imaging of the scinti − camera ， the historical backgrQund of the ability ・ improvement with the analog type scinti − camera and the digital type scinti − camera with the correction system ． the eva ！ uation of uniformity of the analog type scinti ・ camera ． the paramaters (LSF ， MTF) which has much hnfluence on the lneasurement of the scinti ・ camera resolution ． the sensitivity of the collimator and the evaluati 。n of the noise ． Result ： the historical background of the scinti ・ camera suggested the necessity of establishing a standard for the ability evaluation of the digital type scinti ・ camera 、(1) It is necessary to study further the characteristics of the single and multi − energy spectrums ， and to establish new standards for uninformity evalution ， in addition to the NEMA and the JRT standard ．(2) Sampling theory plays a great role in the evaluation of the resolution measurement ， because it is influenced by the sampling interval and the peak counts of LSF ．(3) finally ， Wlth regard to the collimator − sensitivity alld the noise evaluation ， it is necessary to evaluate the noise by the wiener − spectrum method in addition to the FWHM and MTF methods ．(4)