Azmi Hooman, Schulder Michael
Department of Neurological Surgery, Neurological Institute of New Jersey, New Jersey Medical School, Newark, NJ 07103, USA.
Stereotact Funct Neurosurg. 2003;80(1-4):140-5. doi: 10.1159/000075175.
Recently, magnetic resonance imagers (MRIs) with 3-tesla magnets were approved for clinical use. The spatial accuracy of these high-resolution scanners has yet to be proven. In the present study, a computed tomography (CT)- and MRI-compatible phantom was scanned on a CT, a 1.5-tesla MRI and a 3-tesla MRI scanner. The model was registered to the images using an infrared-based surgical navigation system. The distance between the predicted position of the navigation probe tip and the actual target on the image was measured on the x, y and z axes for 13 points on each image. Error was compared across imaging modalities, peripheral versus central targets and along each axis. We found that 3-tesla MRI scans are accurate as stereotactic data sets.
最近，配备3特斯拉磁体的磁共振成像仪（MRI）已获批用于临床。这些高分辨率扫描仪的空间准确性尚未得到证实。在本研究中，一个计算机断层扫描（CT）和MRI兼容的体模在一台CT、一台1.5特斯拉MRI和一台3特斯拉MRI扫描仪上进行扫描。使用基于红外线的手术导航系统将模型与图像配准。在每个图像上的13个点处，在x、y和z轴上测量导航探针尖端的预测位置与图像上实际目标之间的距离。比较了不同成像方式、外周目标与中心目标以及各轴之间的误差。我们发现，3特斯拉MRI扫描作为立体定向数据集是准确的。
