| Autor: |
E L, Schmidt, J, Rittler, R, Steurer |
| Jazyk: |
němčina |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]. 175(1) |
| ISSN: |
0179-7158 |
| Popis: |
One of the important prerequisites for using a virtual wedge is the availability of an appropriate method for quality assurance. A simple method to determine wedge angles has been developed.A formula based on the exponential attenuation curve has been derived, that allows for the calculation of the wedge isodose angles based on 2 measurement points perpendicular to the central ray. The linear attenuation coefficient is the only variable that must be known for the field size under consideration.Using the algorithm introduced, the wedge angle isodoses can be measured with a high degree of accuracy. The deviation of the wedge angle compared to the measurements done according to DIN 6847-4 is less than 1 degree.The described procedure is a simple method of performing routine quality assurance for the virtual wedge. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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