The feasibility of direct applying MRI to treatment planning system of radiotherapy for intra-cranial tumor
- VernacularTitle:MRI直接用于颅内肿瘤治疗计划设计的可行性探讨
- Author:
Liming XU
;
Zhaoxi ZHANG
;
Yongsheng LIU
;
Xiaohong WANG
;
Zhengzhong HE
- Publication Type:Journal Article
- Keywords:
Magnetic resonance imaging;
Radiotherapy planning,computed-asisted;
Feasibility studies
- From:
Chinese Journal of Radiation Oncology
1992;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective Objective To study the feasibility of direct applying MRI to TPS by measuring the geometric distortion of MRI. Methods Phantom 1 was made by marking radical arrangement of fat pipelines every 15? in foam phantom and Phantom 2 by net arrangement at every 2.7?cm. Coronal and transverse scan parallel with the radial and net fat pipeline in the phantom was performed at sequence of cranial FSE T2WI by Marconi 1.5T superconduct MRI machine. Geometric distortion in 5 different fields of view (FOV) was calculated by measuring the absolute borderline error of direct scan and coronal digital reconstructed radiograph (DRR). Results When FOV was equal or smaller than 11.0?cm?11.0?cm, 22.0?cm?22.0?cm and 27.5?cm?27.5?cm, the geometric distortion was 0.0, 1.1 and 1.4?mm of direct scanning MRI and 1.0,1.4 and 2.0?mm of coronal DRR. Conclusion When the magnetic field of MR is high and the tissue shows uniform density, MRI can be applied on TPS directly.
