Response to “Comment on ‘Independent corroboration of monitor unit calculations performed by a 3D computerized planning system’” [J. Appl. Clin. Med. Phys. 2, 102 (2001)]

Comment on “Independent corroboration of monitor unit calculations performed by a 3D computerized planning system” [J. Appl. Clin. Med. Phys. 1, 120‐125 (2000)]

Independent corroboration of monitor unit calculations performed by a 3D computerized planning system

The checking of monitor unit calculations is recognized as a vital component of quality assurance in radiotherapy. Using straightforward but detailed computer-based verification calculations it is possible to achieve a precision of 1% when compared with a three-dimensional (3D) treatment planning system monitor unit calculation. The method is sufficiently sensitive to identify significant error...

Verification of Monitor unit calculations for eclipse Treatment Planning System by in- house developed spreadsheet

Introduction: Computerized treatment planning is a rapidly evolving modality that depends on hardware and software efficiency. Despite ICRU recommendations suggesting 5% deviation in dose delivery the overall uncertainty shall be less than 3.5% as suggested by B.J. Minjnheer. J. In house spreadsheets are developed by the medical physicists to cross-verify the dose calculated by the Treatment Pl...

Comparison of monitor unit calculations performed with a 3D computerized planning system and independent “hand” calculations: Results of three years clinical experience

A comparison of the monitor unit calculations of a commercial 3D computerized treatment planning system (TPS) with "hand" calculations from lookup tables was made for a large number of clinical cases (greater than 13 500 treatment fields). Differences were analyzed by treatment site for prostate, rectum, cranium, and breast. The 3D TPS monitor unit calculation was systematically higher than the...

Evaluation of treatment planning system monitor unit calculations for three intensity modulated radiotherapy delivery techniques

Background: We have validated the monitor unit calculations from a commercially available treatment planning system (TPS) for three intensity modulated radiotherapy (IMRT) planning techniques for tangential breast irradiation by using ionization chamber measurements. Materials and Methods: Treatment plans were generated for forty-two breast patients by a forward planned field in field ...