Investigation of high resolution compact gamma camera module based on a continuous scintillation crystal using a novel charge division readout method |
| |
Authors: | DAI Qiu-Sheng ZHAO Cui-Lan ZHANG Hua-Lin QI Yu-Jin |
| |
Abstract: | The objective of this study is to investigate a high performance and lower cost compact gammacamera module for a multi-head small animal SPECT system.A compact camera module was developed usinga thin Lutetium Oxyorthosilicate(LSO)scintillation crystal slice coupled to a Hamamatsu H8500 positionsensitive photomultiplier tube(PSPMT).A two-stage charge division readout board based on a novel subtractive resistive readout with a truncated center-of-gravity(TCOG)positioning method was developed for the camera.The performance of the camera was evaluated using a flood 99mTc source with a four-quadrant bar-mask phantom.The preliminary experimental results show that the image shrinkage problem associated with the conventional resistive readout can be effectively overcome by the novel subtractive resistive readout with an appropriate fraction subtraction factor.The response output area(ROA)of the camera shown in the flood image was improved up to 34%,and an intrinsic spatial resolution better than 2 mm of detector was achieved.In conclusion,the utilization of a continuous scintillation crystal and a flat-panel PSPMT equipped with a novel subtractive resistive readout is a feasible approach for developing a high performance and lower cost compact gamma camera. |
| |
Keywords: | compact gamma camera module truncated center-of-gravity method image shrinkage effect |
本文献已被 CNKI 万方数据 等数据库收录! |
| 点击此处可从《中国物理C(英文版)》浏览原始摘要信息 |
| 点击此处可从《中国物理C(英文版)》下载免费的PDF全文 |