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| Effect of Bladder Filling Degree on Target Location in Radiotherapy of Cervical Cancer |
| ZHAO Jing, et al |
| School of Life Science of Shandong Academy of Medical Sciences Jinan University, Shandong Ji'nan 250200, China |
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Abstract Objective: To explore the effect of different bladder filling degree on target location in radiotherapy of cervical cancer patients, and to provide reference for clinical application. Methods: A total of 8 patients with cervical cancer who were treated in the first phase of IIB IIIB in our hospital from June 2016 to June 2017 were collected. CT scan was performed in the bladder filling, half filling and vacuity state respectively, and the location of the target area in the different filling states of the cervix and uterus was analyzed. Results: The relative displacement of cervix and uterus in the different filling state of the bladder chould lead to relative bone signs. The change of left and right direction was the smallest. The largest lesion of cervical lesion was 1.5mm. It changed greatly in the direction behind chest. With the increase of bladder capacity, the cervical lesions moved towards the back of the body. The maximum range was 19mm. In the head foot direction during bladder filling degree and half filling degree of the movement of the cervical lesions was statistically significant (P<0.05), at half filling degree and the degree of cervical lesions empty mobility was statistically significant (P<0.05), and with the increase of bladder filling degree of cervical lesions generally to the foot direction body displacement, maximum the amplitude of 18.6mm.The palace of the movement of the influence in the chest behind the relatively large, with the increase of bladder filling degree, the palace body generally to the dorsal movement of the body, the maximum amplitude was 21mm, relatively small in the direction of change, the maximum amplitude of 1.2mm and different degree of bladder filling in the head foot direction opposite to the movement of a body significantly, and increase with the degree of bladder filling, the palace body generally to the head direction of the body displacement, the maximum amplitude of 13mm. Conclusion: In the radiotherapy of cervical cancer, we need to consider the different degree of bladder filling to move the cervical and uterine body position, so as to reduce the deviation of target area and protect normal tissues.
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2018, Vol. 24 
