| Autor: |
K, Merkle, I A, Karpova, N A, Liutova, I A, Poltorakin |
| Rok vydání: |
1983 |
| Předmět: |
|
| Zdroj: |
Meditsinskaia radiologiia. 28(10) |
| ISSN: |
0025-8334 |
| Popis: |
During the planning of irradiation of patients with esophageal cancer significant divergence is frequently noted between topometric maps obtained by conventional x-ray methods including axial tomography, and computerized tomography. Topometric maps based on these two methods were compared. Using a typical example of a series of 12 patients, divergences in expected dose loads on critical points were analysed on the basis of 3 variants of superposed topometric maps. Divergences in topometric maps result from errors in topometric methods and from an impossibility to reproduce precisely the level of a section and physiological conditions during repeated layings of a patient. Divergences in a focal dose (on the esophagus) can reach 8% in rotation radiotherapy, 20% in static irradiation, and on the vertebral canal 28 and 13% respectively. Factors that influence such divergences are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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