Urethrography and ischial intertuberosity line in radiation therapy planning for prostate carcinoma
| Autor: | Leslie St Royal, Luu Tran, Hans Kuisk, Ahmad Sadeghi |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Male
medicine.medical_specialty Urinary Bladder Urology Contrast Media Diatrizoate Ischium Urethra Prostate medicine Humans Radiology Nuclear Medicine and imaging Radiation treatment planning Radiation Injuries Diatrizoate Meglumine Urinary bladder business.industry Urethral sphincter Prostatic Neoplasms Radiotherapy Dosage Hematology Ischial tuberosity Radiography Drug Combinations medicine.anatomical_structure Oncology Sphincter Radiology business |
| Zdroj: | Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology. 38(3) |
| ISSN: | 0167-8140 |
| Popis: | We analyzed our urethrography procedure regarding the validity of using the ischial tuberosity line (ITL) as the caudal margin of treatment portals for prostate carcinoma. The distances of the external urethral sphincter and the lowest margin of the opacified urinary bladder were analyzed in one hundred fifteen consecutive urethrograms. None showed the urethral sphincter to be caudal to the ITL. Ten percent of the sphincters were located less than 1.0 cm cephalad to the ITL, yielding inadequate treatment coverage if the ITL was relied on. Arbitrarily considering 2.0 cm or more of the urethral irradiation to be excessive, the use of the ITL would then have resulted in unnecessary normal tissue irradiation of 42.5%. The ITL should not be used as the caudal margin for prostate treatment portals. Variation in sphincter position, as also seen on lateral projections, reveal a need for urethrography as a necessary supplement to computed tomography to plan radiation portals for prostate cancer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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