[使用环形排列探测器的头部单光子发射计算机断层扫描系统性能及临床图像评估]

[Evaluation of the system performance and clinical images of the single photon emission computed tomography for head using ring arranged detector].

作者信息

Ejiri K, Toyama H, Kato Y, Narita T, Takeshita G, Takeuchi A, Koga S

机构信息

Radiological Technology, Fujita-Gakuen Health University School of Hygiene, Japan.

出版信息

Radioisotopes. 1988 Jan;37(1):35-8. doi: 10.3769/radioisotopes.37.35.

DOI:10.3769/radioisotopes.37.35

PMID:3259705

Abstract

To evaluate the system performance, several preoperational fundamental tests of single photon emission computed tomography (SPECT) were carried out. Spatial resolutions (FWHM) measured with the point-spread functions of a 99mTc line source were 12.5 mm with a high resolution (HR) collimator and 17.2 mm with a high sensitivity (HS) collimator respectively. Slice thicknesses (FWHM) obtained from the profile curves of slice images were 17.5 mm (HR) and 29.0 mm (HS) at the center of rotation. System sensitivities were 5.4 kcps/slice (HR) and 27.8 kcps/slice (HS). Uniformities calculated from the SPECT images of a pool phantom were 4.7% (HR) and 2.7% (HS) at the condition of 3,000 kcounts to be acquired. SPECT images of the HEADTOME SET-031 were considered very useful to diagnose the cerebrovascular disease.

摘要

为评估该系统性能，对单光子发射计算机断层扫描（SPECT）进行了多项术前基础测试。使用99mTc线源的点扩散函数测量的空间分辨率（半高宽），使用高分辨率（HR）准直器时为12.5毫米，使用高灵敏度（HS）准直器时为17.2毫米。从切片图像的轮廓曲线获得的切片厚度（半高宽），在旋转中心处，HR准直器为17.5毫米，HS准直器为29.0毫米。系统灵敏度分别为5.4 kcps/切片（HR）和27.8 kcps/切片（HS）。在采集3000 k计数的条件下，从体模SPECT图像计算出的均匀性，HR准直器为4.7%，HS准直器为2.7%。HEADTOME SET-031的SPECT图像被认为对诊断脑血管疾病非常有用。