Anatomic variation of extrahepatic biliary tree structures: importance in treatment planning for radiation therapy
| Autor: | Jerome C. Landry, K Tsujino, L W Davis, R G Smith, William E. Torres, J W Keller |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Ampulla of Vater
medicine.medical_specialty medicine.medical_treatment Hepatic Duct Common Digestive System Neoplasms Thoracic Vertebrae Cholangiocarcinoma Cholangiography Hepatic lymph nodes medicine Humans Radiology Nuclear Medicine and imaging Radiation treatment planning Lumbar Vertebrae medicine.diagnostic_test business.industry Radiotherapy Planning Computer-Assisted Gallbladder Surgery Radiation therapy Major duodenal papilla medicine.anatomical_structure Liver Common hepatic duct Radiology business |
| Zdroj: | Radiology. 201:271-273 |
| ISSN: | 1527-1315 0033-8419 |
| Popis: | To demonstrate the variable location of biliary tree components and to assess two treatment planning rules of thumb used for locating porta hepatic nodes for radiation therapy.The distance of the common hepatic duct bifurcation and duodenal papilla from adjacent vertebral bodies was measured on 34 cholangiograms, and their relationships to particular vertebral body levels were recorded. Adequacy of treatment volume to encompass porta hepatic lymph nodes was evaluated in 30 of these cholangiograms by constructing radiation portals according to the two rules of thumb.Location of the common hepatic duct bifurcation and duodenal papilla varied widely. The treatment portal encompassed 13% (four of 30) of cases when the first rule of thumb was used and 80% (24 of 30) of cases when the second rule of thumb was used.The wide variability of location of extrahepatic biliary tree structures suggests the need for individualized treatment planning so that sensitive and dose-limiting healthy tissues can be optimally excluded from radiation treatment portals. Computed tomography and other imaging modalities enable precise location of biliary tree components for radiation treatment planning. |
| Databáze: | OpenAIRE |
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