RESUMO
Objective To discuss the feasibility of stereotactic radiotherapy plan designing based on MRI. Methods Based on the study of the serious geometric distortion of MRI while MRI was used in the condition of position by the experiment, how to deal with geometric distortion of MRI for patient positioning by the means of software was studied deeply. The basic thought of correction arithmetic for patient positioning images, of which the corrected data being used to correct patient images was created by primitive sparse corrected data calculated from design data and sampling data was brought forward. Supported by arithmetic research, the MRIC software system was designed and implemented. At last, the experiment model MRI was dealt with the MRIC system. Results The correction arithmetic was proved valid by the result of the experiment model MRI can be corrected back to normal state with MRIC system, which implemented the correction arithmetic. Conclusion It's possible that MRI would be used for positioning and plan designing in SRT.
