Abstract：Objective To explore the value of a homemade foot-fixator in radiotherapy for lower extremity tumors. Methods Lower limbs of 31 patients were fixed by the foot-fixator during lower extremity radiotherapy. Verification images were taken every week during radiotherapy. Positioning error was analyzed by comparison between verification images and simulated positioning images or digitally reconstructed radiographs generated by the treatment planning system. The comparison was made by paired t-test. Results The positioning errors in the head-foot, anterior-posterior, and left-right directions were 2.39±2.21, 0.22±2.73, and 0.20±2.71 mm, respectively. The positioning error in the head-foot direction was significantly larger than those in the anterior-posterior and left-right directions (P=0.000,0.000). Conclusions The homemade foot-fixator shows satisfactory accuracy and repeatability, which holds promise for wide application in radiotherapy for lower extremity tumors.
Wang Jian,Ni Xinye,Ni Xinchu et al. Application of a homemade foot-fixator in radiotherapy for lower extremity tumors[J]. Chinese Journal of Radiation Oncology, 2016, 25(6): 622-624.
2016, Vol. 25 
