Open AccessPractical quantitative measurement of graticule misalignment relative to collimator axis of rotation
Author(s) -
Halabi Tarek,
Faddegon Bruce
Publication year - 2010
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1120/jacmp.v11i4.3318
Subject(s) - collimator , rotation (mathematics) , mathematics , optics , physics , geometry
We design a practical procedure for measuring translational and rotational misalignment of graticule with collimator axis of rotation and collimator jaws, respectively. The procedure's quantitative results are accurate to less than 0.2 mm (at isocenter) and do not assume alignment of radiation focal spot with collimator axis of rotation. When provided with these quantitative results, the manufacturer can custom‐adjust graticules to the purchaser's collimator head. PACS number: 87.56.Fc