高分辨率甲状腺针孔断层扫描的物理与临床评估
Physical and clinical evaluation of high-resolution thyroid pinhole tomography.
作者信息
Wanet P M, Sand A, Abramovici J
机构信息
De Bijloke Hospital, Ghent, Belgium.
出版信息
J Nucl Med. 1996 Dec;37(12):2017-20.
UNLABELLED
High-resolution pinhole-SPECT (PSPECT) is a new method for examining the thyroid gland.
METHODS
The camera is tilted slightly so that it is as close to the thyroid as possible. Patients are injected with 185-260 MBq (5-7 mCi) of [99mTc]pertechnetate and examined for 20 min. The reconstruction algorithm is based on filtered back-projection.
RESULTS
We performed static scintigraphy on the thyroids of 114 patients, followed by PSPECT. The major advantage of P SPECT is high resolution. Three- and 4-mm-pinholes produce resolutions of 6 mm and 7 mm, respectively, while resolutions obtained with a parallel collimator are always above 15 mm. The second advantage associated with this method is the good visualization of the cold nodules surrounded by higher activity. Finally, the reconstruction program provides exact sizes of thyroids.
CONCLUSION
SPECT is a powerful tool for examining the thyroid.
未标注
高分辨率针孔单光子发射计算机断层扫描（PSPECT）是一种检查甲状腺的新方法。
方法
将相机稍微倾斜，使其尽可能靠近甲状腺。给患者注射185 - 260兆贝可（5 - 7毫居里）的高锝[99mTc]酸盐，并检查20分钟。重建算法基于滤波反投影。
结果
我们对114例患者的甲状腺进行了静态闪烁扫描，随后进行了PSPECT检查。PSPECT的主要优点是分辨率高。3毫米和4毫米的针孔分别产生6毫米和7毫米的分辨率，而使用平行准直器获得的分辨率始终高于15毫米。与该方法相关的第二个优点是能很好地显示被较高活性包围的冷结节。最后，重建程序能提供甲状腺的确切大小。
结论
单光子发射计算机断层扫描是检查甲状腺的有力工具。
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