Journal des méthodes de diagnostic médical
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Patient Dose Audit using Interventional and Conventional Radiograph

Kishaan Persaud and Petal Surujpaul

The Patient Dose Audit allows tracking the cumulative dose of a patient subjected to one or more fluoroscopic as well as conventional x-ray examinations, and analyzing the dose distribution profiles over the irradiated areas of interest, with the aim of optimizing dose delivery. This study is performed in real time using the Ray Safe ionization chamber with the Siemens Fluoroscopy unit at the Georgetown Public Hospital Corporation. The Dose Profile generated from an Intravenous Pyelogram interventional study, indicated a higher dose rate and dose deliverance than that of Conventional examination. The dose profile allowed mapping doses delivered to a particular organ within any specific location of the collimated field. This allows for adjustments of factors which can be added and/ or eliminated in tracking doses delivered to specific organs, with and without the presence of the patient. This information from the resulting dose audit would therefore serve as an institutionally based local Diagnostic Reference Levels, which ultimately would better equip Occupationally Exposed Personnel institutionally and by extension across Guyana to be more cautious in dose delivery without compromising diagnostic quality.