Delta-Scan 50全身/脑部扫描仪的物理、性能和剂量学特性。

Physical, performance, and dosimetric characteristics of the delta-Scan 50 whole-body/brain scanner.

作者信息

Bassano D A, Chamberlain C C, Mozley J M, Kieffer S A

出版信息

Radiology. 1977 May;123(2):455-62. doi: 10.1148/123.2.455.

DOI:10.1148/123.2.455

Abstract

The delta-Scan 50 computed tomographic (CT) scanner has the ability to determine x-ray attenuation coefficients with a precision ranging from 0.3 to 2.6% depending upon such factors as patient size and scan diameter. Resolution is 20-80% greater than the pixel width, with values ranging from 1.2 to 2.1 mm. The collimating system determines certain characteristics of the image and affects the dose to the patient: doses for typical procedures are on the order of 1 rad, and gonadal doses are in the millirad range. Potential improvements are discussed.

摘要

Delta-Scan 50计算机断层扫描（CT）扫描仪能够根据患者体型和扫描直径等因素，以0.3%至2.6%的精度确定X射线衰减系数。分辨率比像素宽度高20%至80%，数值范围为1.2至2.1毫米。准直系统决定了图像的某些特征，并影响患者所接受的剂量：典型检查程序的剂量约为1拉德，性腺剂量在毫拉德范围内。文中还讨论了潜在的改进措施。