A phantom study of the geometric accuracy of computed tomographic and magnetic resonance imaging stereotactic localization with the Leksell stereotactic system
A phantom study of the geometric accuracy of computed tomographic and magnetic resonance imaging stereotactic localization with the Leksell stereotactic system
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DOI：
10.1097/00006123-200105000-00025
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发表时间：
2001-05-01
期刊：
影响因子：
4.8
通讯作者：
Petrovich, Z
中科院分区：
文献类型：
--
作者：
Yu, C;Apuzzo, MLJ;Petrovich, Z
目的：为评价Leksell立体定向系统在磁共振成像（MRI）和CT立体定向定位中的空间准确性，将体模构建为每个维度164 mm的盒子形状，在体模内有三个垂直阵列的实心丙烯酸棒，直径为5 mm，间距为30 mm。在本研究中，使用相同的Leksell（Elekta Instruments，斯德哥尔摩，瑞典）头架放置，从两种不同的MRI扫描仪和计算机断层扫描仪获得图像。使用Leksell GammaPlan软件（Elekta Instruments，Norcross，CA）提供的工具测量杆图像在三个主平面中的坐标，并与物理体模测量值进行比较。
OBJECTIVE: To assess the spatial accuracy of magnetic resonance imaging (MRI) and computed tomographic stereotactic localization with the Leksell stereotactic system.METHODS: The phantom was constructed in the shape of a box, 164 mm in each dimension, with three perpendicular arrays of solid acrylic rod, 5 mm in diameter and spaced 30 mm apart within the phantom. In this study, images from two different MRI scanners and a computed tomographic scanner were obtained using the same Leksell (Elekta Instruments, Stockholm, Sweden) head frame placement. The coordinates of the rod images in the three principal planes were measured by using a tool provided with Leksell GammaPlan software (Elekta Instruments, Norcross, CA) and were compared with the physical phantom measurements.RESULTS: The greatest distortion was found around the periphery, and the least distortion (