Abstract
In this work, nine commonly used dosimetry detectors have been investigated to determine suitable relative dosimeters for kilovoltage x-ray beams. By comparison with the Monte Carlo calculated data, it was determined that for the detectors studied the PTW N23342, Markus and NACP parallel- plate chambers are more suitable for the measurement of percentage depth dose (PDD) data for this beam quality range with an uncertainty of about 3%. A diode detector may be used to measure the PDD for the 100 kVp beam, but it is not suitable for higher energies (300 kVp). The Capintec parallel-plate chamber may be adequate for medium-energy photons, but it has a slightly higher uncertainty for low-energy x-rays (100 kVp). For the measurement of beam profiles, diode and film yield incorrect profile tails, which can be corrected using the RK ionization chamber.
Original language | English |
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Pages (from-to) | 2561-2568 |
Number of pages | 8 |
Journal | Physics in Medicine and Biology |
Volume | 42 |
Issue number | 12 |
DOIs | |
State | Published - 1997 |
Keywords
- Humans
- Models, Theoretical
- Monte Carlo Method
- Muscle, Skeletal
- Phantoms, Imaging
- Radiotherapy Dosage
- Radiotherapy Planning, Computer-Assisted
- Radiotherapy/instrumentation
- Reproducibility of Results
- Water
- X-Rays