The effect of intravenous contrast on accuracy of Cyberknife skull tracking
DONG Yang
LI Fengtong
ZHUANG Hongqing
WANG Jingsheng
YUAN Zhiyong
SONG Yongchun
CHEN Huaming
Abstract：Objective To quantitatively evaluate the effect of using digitally reconstructed radiograph (DRR) generated images from contrast-enhanced CT on the accuracy of Cyberknife skull tracking. Methods Forty-one patients with intracranial lesions, planning to receive Cyberknife treatment, were enrolled. Each patient underwent CT with the same scanning parameters before and after administration of contract medium. For each patient 2 sets of DRR images (noncontrast, contrast) were generated as the references for the skull tracking image guided procedure. After image registering between DRR images and patients’ digital images generated by image guided system of Cyberknife, paired t-test was applied on the results. Results The deviations in 6 sets of position were all within ±0.02mm. The max deviation between the two reference groups was 0.3 mm. All of the results have no statistical differences (P>0.05). Conclusion Using contrast medium or not for generating reference has little effect on accuracy of Cyberknife skull tracking.
Keywords：Contrast mediumImage guided radiotherapyCyberknifeSkull tracking
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 209-211 )