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    • 3. 发明授权
    • Indentification and quantification of needle displacement departures from treatment plan
    • 针位置的识别和量化偏离治疗计划
    • US06438401B1
    • 2002-08-20
    • US09636551
    • 2000-08-11
    • Gang ChengHaisong LiuYan Yu
    • Gang ChengHaisong LiuYan Yu
    • A61B505
    • A61N5/103A61B8/0833A61B8/0841A61B2034/2051A61B2034/2055A61B2034/2059A61N5/1027A61N2005/1011
    • A placement plan is developed for the placement of radioactive seeds in a prostrate for brachytherapy. The placement plan is made available to an intraoperative tracking interface which also shows a live ultrasound image of the needle or catheter placement in the prostate. The difference in the x-y plane between the planned and actual locations of the needle or catheter is calculated, and from that difference, the error in position of each seed is calculated. The seeds are moved, or the operator changes the number of seeds, and the dose is recalculated. A small column of ultrasound images is taken, and each seed located in the column of images is given a confidence level. If the confidence level exceeds a threshold set by the operator, the dosimetry is recalculated. Periodically throughout the seed placement, fluoroscopic x-rays are taken, and the seed coordinates are matched to the x-ray image. Seed locations with low confidence levels are adjusted based on the x-ray locations, and the dosimetry is recalculated.
    • 开发了放射性种子放置在近距离放射治疗的前列腺中的放置计划。 放置计划可用于术中跟踪界面,其还显示针或导管放置在前列腺中的活超声图像。 计算针或导管的计划和实际位置之间的x-y平面的差异,并从该差异计算每个种子的位置误差。 移动种子,或者操作者改变种子数,并重新计算剂量。 拍摄一小列超声波图像,并将位于图像列中的每个种子置于置信水平。 如果置信水平超过操作者设定的阈值,则重新计算剂量测定。 在整个种子放置期间,采取荧光X射线,种子坐标与X射线图像相匹配。 基于x射线位置调整低置信水平的种子位置,并重新计算剂量测定。