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Journal of Radiography & Radiation Sciences

2007;  (v 21): 1-9

 

Adapting the CDRH Abdominal Phantom for Dose-image Quality Optimisation in Abdominal Radiography

Egbe NO and Sharp PF.

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This work is licensed under the Creative Commons Attribution International License (CC BY).
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To evaluate medical X-ray doses and image quality, so called phantoms that mimic particular aspects of the patient are used. The Centre for Devices and Radiological Health (CDRH) had designed a phantom for studying radiation exposure to the human abdomen. An abdominal phantom for image quality studies has not been found in the literature. Direct comparison of the CDRH phantom performance with clinical abdominal images has not been reported previously. This study applied the phantom to conventional radiography imaging of the abdomen to establish its patient equivalence and therefore its applicability in quality control studies in radiology departments. Results show a difference in beam transmission (BT) of 21.2% (r = 0.3; p>0.05) and an optical density (OD) of 1.62 against 1.65 for patient abdominal films (p=0.54). Despite the variations and a poor linearity with patient data, the phantom satisfied Optical density requirements, is portable, adjustable, and simple to assemble. It can therefore find application in image quality studies in diagnostic radiology.

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