| Objective To verify the practicability and feasibility of ultrasound guided radiotherapy for cervical cancer by analyzing the positioning errors of the CBCT image guided radiotherapy for cervical cancer.Methods Ten cases of cervical cancer patients were selected, the implementation of image guided radiotherapy, before and after the daily radiotherapy was performed to verify the B ultrasound and CBCT, respectively, andthe deviation in direction of before and after, the left and right, the head and footwere recorded for each time.Results After B ultrasound examination, the center shift in the left and right direction, the front and back direction, the direction of the head was (2.55±3.09) mm, (2.68± 3.80) mm, (3.57± 4.61) mm, respectively. After the validation of CBCT, center shift in the left-right direction, and direction, the head foot direction was respectively (2.49±3.65) mm, (3.05±4.47) mm, (2.86±4.30) mm, and the difference in the center shift of different directions was not statistically significant when the two methods were compared(P>0.05).Conclusion Ultrasound guided cervical cancer radiotherapy can be used in clinical practice, its operation being simple, without radiationand with slight system errorthat can be corrected in time. |
