Set-up error of CR in total body irradiation localization and lung shielding

VernacularTitle:CR在全身照射定位和肺部挡铅的摆位误差
Author: Jun HAN ; Qin LI ; Ting CAO ; Zhiyong YANG ; Zhiwen LIANG ; Mi CHEN ; Lili WEI
Publication Type:Journal Article
Keywords: Computed radiography; Total body irradiation; Image quality; Set-up error
From: Chinese Journal of Radiological Medicine and Protection 2013;(3):303-305
CountryChina
Language:Chinese
Abstract: Objective To investigate the set-up error of CR in total body irradiation localization and lung shielding.Methods TOR 18FG software was employed to measure the image quality of images at kV and MV levels.The clinical processes were established and the positioning error was analyzed.Results The low contrast resolution and spatial resolution of MV level images were much worse than those at kV level in the condition of total body irradiation,but the image at MV level could be used to identify the high contrast tissues and employed in total body irradiation.The longitudinal errors were (0.50 ± 1.65) cm for left lung and (1.16 ± 1.56)cm for right lung in A P direction,while (1.12 ± 2.22)cm and (0.41 ± 2.16)cm respectively in PA direction.The errors of lateral were (0.81 ± 1.19)cm for left lung and (0.43 ±1.20)cm for right lung in AP direction,while (0.31 ± 1.64)cm and (0.55 ± 1.49)cm respectively in PA direction.Conclusions Application of CR in total body irradiation could make positioning in treatment much easily and reduce the localization errors.