Assessment Of Scattered Radiation Dose For Different CT Imaging Protocols In 128-slice And 512-slice Multi-detector Computed Tomography (MDCT) Scanners

Abstract

Computed Tomography (CT) has become the primary diagnostic tool among imaging devices, driven by continuous advancements in technology. Hospitals are increasingly adopting the latest Multi-detector Computed Tomography (MDCT) scanners to take advantage of their enhanced imaging capabilities. However, these advancements raise concerns about scattered radiation due to higher x-ray output. This study aims to compare scattered radiation dose levels between 128-slice and 512-slice MDCT scanners across different CT imaging protocols and evaluates the effectiveness of radiation shielding in a CT suite of a hospital in Kedah. Using a RaySafe 452 survey meter and a PMMA phantom, scattered radiation was measured during CT brain, thorax, and abdomen scans at both controlled and uncontrolled areas. There is a significant difference (p = 0.029) in scattered radiation dose for different CT imaging protocols between 128-slice and 512-slice MDCT scanners at various locations. The main door exhibited the highest radiation for the 128-slice MDCT, while the corridor had the lowest levels for both scanners. This study highlights the varying radiation exposure between different MDCT technologies and underscores the importance of effective radiation shielding in minimizing exposure.