膀胱充盈状态对宫颈癌术后盆腔放射治疗影响的研究

目的探讨膀胱充盈状态对三维适形放射治疗（three-dimensional conformal radiotherapy,3DCRT）和调强放射治疗（intensity-modulated radiotherapy，IMRT）靶区勾画的影响。方法选择2006—2007年本院15例宫颈癌广泛性全子宫切除术及盆腔淋巴结清扫术后有术后盆腔放射治疗指征的患者进行膀胱充盈状况的研究，对膀胱充盈和膀胱排空状态时膀眺受照容积百分比以及肠道受照容积百分比进行观测。结果俯卧位膀胱处于充盈状态时，膀胱受照容积百分比较膀膀胱处于排空状态时小，且小肠和结肠受照容积百分比较膀胱处于排空状态时亦小。结论膀胱处于充盈状态因可使膀胱及肠道受照容积百分比减少而优于膀胱排空。

Study of the status of bladder ( full or empty) on the pelvic radiotherapy in posthysterectomy cervical carcinoma

Objective To explore the status of bladder (full or empty)on the planning target volume (PTV)of the -dimensional conformal radiotherapy and the intensity-modulated radiotherapy Methods During 2006-2007, patients with cervical carcinoma underwent hysterectomy with high-risk of recurrence were selected for this study. The following observations and measurements were used for study: To measure different status of bladder(full or empty) and influence on irradiated volume of bladder and small bowel. Results The percentage of irradiated volume of bladder and small bowel were smaller when bladder was full status compared with empty status if other factors balanced. Conclusion The status of bladder should be controlled during radio-therapy and full status seemed better.