Effect of Collimator Setting on the Output of Rectangular Fields from Linear Accelerators
| Autor: | Kathleen M. Anderson, Shirish K. Jani, Edward C. Pennington, Judith Wacha |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Physics
High energy medicine.medical_specialty Photon Radiological and Ultrasound Technology Field (physics) business.industry Physics::Medical Physics Radiotherapy Dosage Collimator Square (algebra) Linear particle accelerator law.invention Radiotherapy High-Energy Optics Oncology Dimension (vector space) law medicine Humans Dosimetry Radiology Nuclear Medicine and imaging Medical physics Particle Accelerators business |
| Zdroj: | Medical Dosimetry. 13:73-75 |
| ISSN: | 0958-3947 |
| Popis: | The output (cGy/mu) of a rectangular field from a linear accelerator is not always the same as that of its equivalent square field. We have summarized output variations with upper and lower collimator setting for 4, 6, and 24 MV X-rays. It is concluded that an error in output on the order of a few percent is introduced for elongated fields if lower set of collimator jaws is used for setting the longer dimension of the field, and computing the output using equivalent square method. It is recommended that specific guidelines be developed regarding rectangular field setting on high energy linacs. |
| Databáze: | OpenAIRE |
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