SU-E-I-51: Investigation of Absorbed Dose to the Skin, Eyes and Thyroid of Patients during CT Angiography and Comparison with Conventional Angiography

Medical Physics
M Tavakoli HJ Salman

Abstract

Imaging is one of the most important methods to diagnose cardiovascular and especially coronary artery diseases. The advent of multislice CT in recent years has made new capabilities for medical imaging. Coronary CT angiography as a new imaging method is performed with these devices. Despite of many advantages with it, patients absorbed dose is relatively high in coronary ct angiography, Then study on various aspects of absorbed dose to patients seems to be necessary. The aim of this study was to evaluate absorbed dose to patient's skin, thyroid and eye during coronary CT angiography and to compare it with the same organ doses in conventional angiography. A number of 67 patients referring to Isfahan's Azzahra(s) and Sina hospitals for coronary CT angiography imaging were investigated to evaluate absorbed dose to their skin, thyroid and eyes. Organs absorbed dose was obtained via measurement by TLD. One pair GR-200 type TLDs were used for each organ dose measurement. TLDS were calibrated using Co 60 source before measuring. Absorbed dose to each organ considered to be as average of TLDs readout. Coronary CT angiography was performed either by 64 rows detectors CT lighspeed VCT in Azzahra(s) or Philips model in Sina hospitals. Th...Continue Reading

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