The Study of trigeminal impression on the crista of petrosal bone and clinical using
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摘要:
目的对原发性三叉神经痛患者做薄层CT及MRI扫描，观察三叉神经的跨越岩骨嵴处的解剖学特点找到原发性三叉神经痛可靠的CT定位的放疗靶点。 方法我们对95例原发性三叉神经痛病人采用17~29 Gy的剂量进行X刀放疗，应用50例患者进行薄`层CT研究，扫描层厚为1.25 mm及0.625 mm，同时进行1.25 mm层厚MRI扫描，并进行CT和MRI图象融合研究。 结果结果发现在1.25 mm层厚压迹发现率94%，0.625 mm压迹发现率100%，CT和MRI图象融合发现MRI图象显示的三叉神经穿越岩骨嵴形成的凹陷完全一致，准确率100%。放疗效果有效率为85.26%。 结论三叉神经跨越岩骨嵴处存在压迹，这一骨性标志是原发性三叉神经痛放疗的可靠标志点。 Abstract:ObjectiveTo study the patients who had primary trigeminal neuralgia using CT and MRI in thin slicer scan, in order to find a dependable new target to treat primary trigeminal neuralgia used by CT positioning for radiotherapy. Methods95 patients got 17Gy extend to 29Gy doses by χ-ray knife using the trigeminal impression on the crista. We had studied the 50 cases thin CT slice who had primary trigeminal neuralgia, CT slice thickness is 1.25 mm and 0.625 mm, to research MRI and CT image fusion. ResultsThe rate of impression was 94% for 1.25mm CT slice thickness and 100% for 0.625mm respectively, finding the impression on the crista of petrosal bone in compared with the trigeminal position was identical completely, accurate rate was 100% and effective rate was 85.26% for radiotherapy. ConclusionsThe trigeminal impression on the crista of petrosal bone was a dependable symbol for the radiotherapy of primary trigeminal neuralgia patients. -
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