Medium field of view multiflat panel-based portable gamma camera
Medium field of view multiflat panel-based portable gamma camera
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中视场多平板便携式伽马相机
DOI：
10.1016/j.nima.2004.03.077
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发表时间：
2004
影响因子：
1.4
通讯作者：
A. Sebastiá
中科院分区：
文献类型：
--
作者：
M. Giménez;J. Benlloch;J. Cerdá;B. Escat;M. Fernandez;E. Gimenez;C. Lerche;J. D. Martínez;F. Mora;N. Pavón;F. Sánchez;A. Sebastiá
基于多阳极技术的便携式伽马相机已经建成并进行了测试。该相机由四个“平板”H8500 PSPMT光学耦合到一个100×100×4mm3CsI（Na）连续闪烁晶体。相机的尺寸为17×12× 12cm3，包括针孔准直器，总重量为2kg。它的平均空间分辨率为2mm，能量分辨率约为15%，显示视场为95mm。由于其便携性、FOV和成本，它是骨科、肾脏、乳腺和内分泌（甲状腺、甲状旁腺和肾上腺）血管造影以及其他重要应用（如术中淋巴结检测和外科肿瘤学）的方便选择。我们描述的模拟解释晶体的选择，机械设计的相机和校准的方法和算法用于位置，能量和均匀性校正。我们呈现的是从幻影中拍摄的图像。我们计划通过使用四孔准直器结合MLEM算法来增加相机灵敏度，以减少探索时间并减少给予患者的剂量。
A portable gamma camera based on the multianode technology has been built and tested. The camera consists in optically coupling four “Flat Panel” H8500 PSPMTs to a 100×100×4mm3CsI(Na) continuous scintillation crystal. The dimensions of the camera are 17×12×12cm3including the pinhole collimator and it weighs a total of 2kg. Its average spatial resolution is 2mm, its energy resolution is about 15%, and it shows a field of view of 95mm. Because of its portability, its FOV and its cost, it is a convenient choice for osteological, renal, mammary, and endocrine (thyroid, parathyroid and suprarenal) scintigraphies, as well as other important applications such as intraoperatory detection of lymph nodes and surgical oncology. We describe the simulations performed which explain the crystal choice, the mechanical design of the camera and the method of calibration and algorithms used for position, energy and uniformity correction. We present images taken from phantoms. We plan to increase the camera sensitivity by using a four-holes collimator in combination with the MLEM algorithm, in order to decrease the exploration time and to reduce the dose given to the patient.