Measurement of percentage depth dose and lateral beam profile for kilovoltage x-ray therapy beams. Phys Med Biol 1997 Dec;42(12):2561-8
Date
01/22/1998Pubmed ID
9434308DOI
10.1088/0031-9155/42/12/019Scopus ID
2-s2.0-0031442330 (requires institutional sign-in at Scopus site) 44 CitationsAbstract
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.
Author List
Li XA, Ma CM, Salhani DMESH terms used to index this publication - Major topics in bold
HumansModels, Theoretical
Monte Carlo Method
Muscle, Skeletal
Phantoms, Imaging
Radiotherapy
Radiotherapy Dosage
Radiotherapy Planning, Computer-Assisted
Reproducibility of Results
Water
X-Rays
