Department of Diagnostic Radiology and Organ Imaging, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China.
J Neurosurg. 2010 Dec;113(6):1144-51. doi: 10.3171/2010.7.JNS10393. Epub 2010 Aug 20.
Anterior temporal lobe resection plus amygdalohippocampectomy can cause damage to the anterior portion of the optic radiation, also known as the Meyer loop, resulting in homonymous superior quadrantanopia. Magnetic resonance diffusion tensor tractography (DTT) of the Meyer loop can help in surgical planning. In this study, the distance of the anterior tip of the Meyer loop to the temporal lobe pole (ML-TP) in the Southern Chinese population was assessed.
The authors studied 16 Southern Chinese individuals (8 men and 8 women; mean age 45.6 years, range 21-60 years). Diffusion tensor images were obtained with a 3-T MR imaging system using a single-shot spin echo echo planar imaging sequence. Two trained operators, one neurosurgeon (Operator A) and one radiologist (Operator B), carried out the DTT analysis with software iPlan (BrainLAB) and FiberTrak (Philips).
For the 32 temporal lobes, the intraclass correlation coefficient (ICC) of the 2 operators' results using iPlan was 0.96, while that of Operator A using iPlan and Operator B using FiberTrak was 0.75. The ICC of Operator B using iPlan and FiberTrak was 0.81. The ML-TP distance of normal lobes (30 lobes [2 lobes that previously underwent surgery were excluded]) was 36.3±5.5 mm (range 26.6-48.9 mm), 36.3±5.3 mm (range 26.8-48.2 mm), and 35.9±6.4 mm (range 20.8-48.4 mm) for Operator A using iPlan, Operator B using iPlan, and Operator B using FiberTrak, respectively (p>0.05).
The 2 operators reached good agreement on ML-TP distance measurement using DTT. The DDT results can be more software dependent than operator dependent. The measurement with FiberTrak demonstrated larger range and standard deviation than measurement with iPlan.
前颞叶切除术加杏仁核海马切除术可能会损伤视辐射的前部，也称为 Meyer 环，导致同侧上象限偏盲。Meyer 环的磁共振弥散张量纤维束成像（DTT）有助于手术规划。本研究评估了华南人群中 Meyer 环前段至颞极（ML-TP）的距离。
作者研究了 16 名华南个体（8 名男性和 8 名女性；平均年龄 45.6 岁，范围 21-60 岁）。使用 3.0T MR 成像系统，通过单次激发自旋回波回波平面成像序列获得弥散张量图像。两名训练有素的操作人员，一名神经外科医生（操作者 A）和一名放射科医生（操作者 B），使用 iPlan（BrainLAB）和 FiberTrak（Philips）软件进行 DTT 分析。
对于 32 个颞叶，使用 iPlan 的两名操作者结果的组内相关系数（ICC）为 0.96，而操作者 A 使用 iPlan 和操作者 B 使用 FiberTrak 的 ICC 为 0.75。操作者 B 使用 iPlan 和 FiberTrak 的 ICC 为 0.81。正常脑叶（排除 2 个曾接受手术的脑叶）的 ML-TP 距离分别为 36.3±5.5mm（范围 26.6-48.9mm）、36.3±5.3mm（范围 26.8-48.2mm）和 35.9±6.4mm（范围 20.8-48.4mm），分别由操作者 A 使用 iPlan、操作者 B 使用 iPlan 和操作者 B 使用 FiberTrak 测量（p>0.05）。
两名操作者在使用 DTT 测量 ML-TP 距离方面达成了良好的一致。DTT 结果比操作者依赖性更依赖于软件。与使用 iPlan 相比，使用 FiberTrak 测量的结果范围更大，标准差也更大。
