Prostate–Rectum Spacing from Apex to Base and Its Impact on Organs-At-Risk Dosimetry in Prostate Cancer SBRT
Abstract
Stereotactic body radiation therapy (SBRT) for localized prostate cancer delivers high doses per fraction, making dose constraints for the rectum and other organs at risk critical during treatment planning. This study evaluated the association between prostate–rectum separation, achieved with a biodegradable balloon rectal spacer at different anatomical levels, and corresponding organ-at-risk dose patterns. Thirty-three patients underwent transperineal balloon spacer implantation followed by SBRT to 36.25 Gy in five fractions. Prostate–rectum separation at the apex, mid-gland, and base were measured on CT and/or MRI and categorized as
Fields of Study & Subjects
Advanced Radiotherapy Techniques
Prostate Cancer Diagnosis and Treatment
Radiation Therapy and Dosimetry
Publication details
- Journal / source
- Radiation
- Volume
- 6
- Issue
- 1
- Pages
- 8–8
- Publication date
- 24 February 2026
- Language
- EN