OPTIMISATION OF PATIENT DOSE AND IMAGE QUALITY IN ENDOSCOPIC RETROGRADE CHOLANGIOPANCREATOGRAPHY: A PHANTOM-BASED EVALUATION

A phantom-based study is presented aiming to optimise patient dose and image quality (IQ) in endoscopic retrograde cholangiopancreatography procedures, utilising a fluoroscopy system equipped with a flat panel detector. The patient thickness was simulated with various polymethyl methacrylate slabs,...

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Bibliographic Details
Published inRadiation protection dosimetry Vol. 175; no. 1; p. 118
Main Authors Hadjiconstanti, Anastasia C, Messaris, Gerasimos A T, Thomopoulos, Konstantinos C, Solomou, Aikaterini G, Panayiotakis, George S
Format Journal Article
LanguageEnglish
Published England 01.06.2017
Subjects
Cardiology
Cholangiopancreatography, Endoscopic Retrograde
Fluoroscopy
Humans
Phantoms, Imaging
Radiation Dosage
Radiographic Image Enhancement
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Summary:A phantom-based study is presented aiming to optimise patient dose and image quality (IQ) in endoscopic retrograde cholangiopancreatography procedures, utilising a fluoroscopy system equipped with a flat panel detector. The patient thickness was simulated with various polymethyl methacrylate slabs, whilst IQ was evaluated using the Leeds test object. The main factors evaluated were phantom thickness, distance between phantom and detector, field of view and pulse rate. For all these factors, the dosemetric indices, entrance surface air kerma (ESAK) rate and ESAK per pulse, as well as the IQ parameters, signal-to-noise ratio and high contrast spatial resolution, were measured. Based on these measurements, the figure of merit (FOM) was estimated. The FOM and ESAK rate values indicated the optimum combination of the factors evaluated which could provide adequate clinical information, assuring minimum patient dose.
ISSN:1742-3406
DOI:10.1093/rpd/ncw276