Mullani N A, Gould K L, Hartz R K, Hitchens R E, Wong W H, Bristow D, Adler S, Philippe E A, Bendriem B, Sanders M
Positron Diagnostic and Research Center, University of Texas Health Science Center, Houston.
J Nucl Med. 1990 May;31(5):610-6.
A high-resolution, whole-body positron camera, POSICAM 6.5 BGO, has been designed, built, and tested; results from it are presented. The camera utilizes 1,320 BGO crystals and 720 PMTS in a staggered geometry to produce high resolution of 5.8 mm FWHM and 21 image planes simultaneously. The axial resolution of the camera is measured at 11.9 mm at the center. High axial sampling is achieved with 5.125 mm separation of the image planes such that three-dimensional imaging of an object can be carried out in a single scan. Recovery of volumetric distribution of radioactivity and object dimensions in axial and sagittal views is demonstrated by imaging spherical objects 13 mm to 39 mm in diameter.
已设计、制造并测试了一款高分辨率全身正电子相机POSICAM 6.5 BGO，并展示了其测试结果。该相机采用交错式几何结构，使用1320块BGO晶体和720个光电倍增管，可同时产生5.8毫米半高宽的高分辨率和21个图像平面。相机的轴向分辨率在中心处测得为11.9毫米。图像平面间距为5.125毫米，实现了高轴向采样，从而可以在单次扫描中对物体进行三维成像。通过对直径为13毫米至39毫米的球形物体进行成像，证明了在轴向和矢状视图中放射性体积分布和物体尺寸的恢复情况。
