Title New generation nuclear medicine devices for cardiac imaging /
Translation of Title Naujos kartos branduolinės medicinos detektorių galimybės širdies ligų diagnostikoje.
Authors Ledas, Giedrius
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Pages 20
Keywords [eng] Keywords: Myocardial perfusion scintigraphy, single photon emission computed tomography, cardiac radiopharmaceuticals, radiation dose, cadmium-zinc-telluride detectors. Raktiniai žodžiai: miokardo perfuzijos scintigrafija, vieno fotono emisijos kompiuterinė tomografija, širdies radiofarmaciniai preparatai, apšvitos dozė, kadmio-cinko-teliurido detektoriai
Abstract [eng] Myocardial perfusion scintigraphy is a leading nuclear medicine diagnostic procedure in Vilnius University Hospital Santaros Klinikos, that uses radioactive tracers to provide immensely useful data about perfusion processes in the heart muscle. Soon after the invention of this technique, one of the main tasks for this procedure became reduction of patient received radiation. In the past decade, a lot of upgrades were done to all parts of Single Photon Emission Computed Tomography diagnostic system to keep the patient radiation as low as possible, while preserving the optimal diagnostic quality. The sensitivity of cardiac-centered gamma cameras was increased with newer semiconductor detectors – instead of sodium iodide, new cadmium-zinc-telluride detectors have higher sensitivity, improved energy resolution and eliminates need for photomultiplier tubes. The enriched myocardial count sensitivity of cardiac-centered systems allowed for a decrease in the dose of injected radiopharmaceuticals for myocardial perfusion scintigraphy, resulting in lower radiation exposure to the patient and staff. Accurate dose adaptation to the correctly set parameters of the gamma camera is essential to acquire good quality images with reduced radiation dose to the patient. In this work we analyze how the radiation exposure tendencies changed over the 2009–2021 period in Vilnius University Hospital Santaros Klinikos Nuclear Medicine department with the introduction of new generation cadmium-zinc-telluride gamma cameras and more accurate calculation of dosage of perfusion tracers using patient weight and body mass index.
Dissertation Institution Vilniaus universitetas.
Type Master thesis
Language English
Publication date 2022