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Updated: Aug 30, 2025

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
DETERMINATION OF ENTRANCE SURFACE DOSE FOR THREE COMMON PLANAR DIAGNOSTIC X-RAY EXAMINATIONS
Jeyasingam Jeyasugiththan1, G P N T Ehalagasthanna1, Urshella Hishaam1
1Department of Nuclear Science, Faculty of Science, University of Colombo, Colombo 03, Sri Lanka.
Abstract:
Patient dose during diagnostic radiography procedures primarily depends on the entrance surface dose (ESD) and the exposure area. The purpose of this study was to determine ESD for five common diagnostic X-ray examinations using dose area product and X-ray tube output. The ESDs were estimated in a sample of 340 patients using normalised X-ray output from Philips-PrimaryDiagnost digital X-ray machine equipped with digital flat panel scintillator detector. The resultant mean ESDs for chest postero-anterior/lateral, lumbar spine antero-posterior (AP)/lateral and abdomen AP were 0.49, 2.00, 5.74, 12.79 and 4.62 mGy, respectively. The mean and third quartile ESD values of this study were significantly higher than the values found in the literature. This can be attributed to the lower tube potential (kVp) values and the higher tube current-time products (mAs). The methodology used here is a better option for low-resources countries for routine dose monitoring.
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