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Patient dose and image quality in five standard x‐ray examinations
Author(s) -
Havukainen R.,
Pirinen M.
Publication year - 1993
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596987
Subject(s) - kerma , image quality , nuclear medicine , computed radiography , medicine , x ray , dicom , radiology , radiography , medical imaging , materials science , dosimetry , optics , physics , image (mathematics) , computer science , artificial intelligence
Patient doses and image quality in five standard x‐ray examination projections (22–36 measurements per each projection) have been measured, using homogeneous phantoms. The means and range of variation for the entrance skin air kerma values were: abdomen AP 5.2 mGy (1.1–21 mGy), chest PA 0.27 mGy (0.035–0.84 mGy), lumbar spine AP 8.4 mGy (2.9–28 mGy), skull LAT 3.1 mGy (1.1–7.7 mGy), and thoracic spine AP 7.9 mGy (1.3–22 mGy). Considerable variation was found in image quality parameters: film optical densities, image contrasts, and resolutions as well as in exposure values, tube voltages, exposure times, and in half‐value thicknesses. The study indicated the need to standardize medical x‐ray examination techniques in different x‐ray departments. The measuring method can be used for comparing the patient dose and image quality of an individual x‐ray unit to the doses and image quality in general use. The results can be used as the reference values for quality control of x‐ray equipment.