The Use Of Multiple CT Scans To Reduce Target Positioning Errors In Patients Undergoing External Beam Radiotherapy Treatment For Prostate Cancer
The Use Of Multiple CT Scans To Reduce Target Positioning Errors In Patients Undergoing External Beam Radiotherapy Treatment For Prostate Cancer
RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells. Multiple CT scans may improve the accuracy of radiation therapy for prostate cancer.
PURPOSE: Phase I trial to study the effectiveness of multiple CT scans in guiding the treatment of patients who have prostate cancer and are undergoing radiation therapy.
OBJECTIVES:
OUTLINE: Patients undergo radiotherapy over 9 weeks. Patients undergo a CT scan immediately prior to receiving radiotherapy on treatment days 3-8 and then weekly thereafter. On 3 different days, patients also undergo CT scan immediately after radiotherapy. If the CT scans indicate a correction that exceeds the action level currently in effect, then beginning with the next treatment, the patient's position with respect to the radiation field is adjusted.
PROJECTED ACCRUAL: A total of 25 patients will be accrued for this study within 2 years.
DISEASE CHARACTERISTICS:
PATIENT CHARACTERISTICS:
Age:
Performance status:
Life expectancy:
Hematopoietic:
Hepatic:
Renal:
PRIOR CONCURRENT THERAPY:
Biologic therapy:
Chemotherapy:
Endocrine therapy:
Radiotherapy:
Surgery: