Steiner P, Zweifel K, Botnar R, Schoenenberger A W, Debatin J F, von Schulthess G K, Hodler J
Department of Diagnostic Radiology, MR-Center University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland.
Eur Radiol. 1998;8(4):592-7. doi: 10.1007/s003300050441.
The purpose of this study was to perform percutaneous laser disc decompression (PLDD) under MR guidance in an open configuration 0. 5-T MR system. Following failed conservative treatment for 6 months, eight patients with contained disc herniations were enrolled in the study. Following MR guided introduction of the laser fiber into the targeted disc space, the laser-induced temperature distribution was visualized using a color-coded subtraction technique based on a T1-weighted GRE sequence. In seven patients PLDD could be performed. In all cases laser effects were depicted by MR. In this regard the color-coded technique was found to be superior to conventional magnitude images. Whereas no apparent decrease in the extent of herniation was discovered immediately following PLDD, T2-weighted FSE images showed signal intensity alterations in two of the seven patients. Clinical evaluation, obtained 3-4 months after PLDD, revealed a fair (n = 2) or good (n = 4) response to the treatment. One patient showed no change in symptoms. MR guidance and monitoring of PLDD is feasible within an open 0.5-T system and seems to render PLDD more safe and controllable.
本研究的目的是在开放式0.5-T磁共振系统的磁共振引导下进行经皮激光椎间盘减压术（PLDD）。在经过6个月的保守治疗失败后，8例局限性椎间盘突出症患者被纳入本研究。在磁共振引导下将激光光纤引入目标椎间盘间隙后，基于T1加权梯度回波序列，采用彩色编码减法技术观察激光诱导的温度分布。7例患者成功进行了PLDD。在所有病例中，磁共振均显示了激光效应。在这方面，发现彩色编码技术优于传统的幅度图像。虽然在PLDD后立即未发现突出程度有明显降低，但在7例患者中的2例T2加权快速自旋回波图像上显示了信号强度改变。在PLDD后3-4个月进行的临床评估显示，治疗反应为一般（n = 2）或良好（n = 4）。1例患者症状无变化。在开放式0.5-T系统内进行磁共振引导和监测PLDD是可行的，并且似乎使PLDD更安全、可控。
