Singles transmission scanning for rotating positron cameras with large-area detectors

1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255) Pub Date : 1998-11-08 DOI:10.1109/NSSMIC.1998.773927

K. Erlandsson, N. Evans, L. White, M. Flower, A. Reader, D. Duxbury, R. Ott

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引用次数: 4

Abstract

This paper describes the novel geometry and initial results of a singles transmission system for PETRRA, a whole-body PET camera with 400/spl times/600 mm BaF/sub 2/-TMAE detectors. Special frames mounted on to the front face of each detector support a collimated Cs-137 source in various positions. Cone-beam transmission data are acquired during 360/spl deg/ gantry rotation and images are reconstructed using the Feldkamp algorithm. The radial field of view (FOV) can be increased by using two source positions displaced either side of the central position. The truncated data acquired from each source position are combined to form a complete dataset. The axial FOV depends on the amount of collimation in the axial direction and could be increased by horizontal couch motion. Preliminary singles transmission images of both real and simulated thorax phantoms have been obtained. The effects of varying the linear sampling interval, the number of projections and the axial FOV have been studied. The singles transmission scanning system, described here and developed for PETRRA, could be applied to other PET cameras with large planar detectors.

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带大面积探测器的旋转正电子相机的单透射扫描

本文描述了用于PETRRA的单传输系统的新几何结构和初步结果，PETRRA是一种全身PET相机，具有400/spl倍/600 mm BaF/sub 2/-TMAE探测器。安装在每个探测器正面的特殊框架支持在不同位置的准直Cs-137源。在360度/spl度/龙门旋转过程中获取锥束传输数据，并使用Feldkamp算法重建图像。径向视场(FOV)可以通过在中心位置两侧使用两个源位置来增加。从每个源位置获取的截断数据被组合成一个完整的数据集。轴向视场取决于轴向准直的量，可以通过水平运动增加。初步获得了真实和模拟胸腔幻象的单次传输图像。研究了线性采样间隔、投影数和轴向视场的影响。这里描述的为PETRRA开发的单透射扫描系统可以应用于其他具有大型平面探测器的PET相机。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)

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