Computed Tomography Dosimetry and Dose Risks Research Paper

Computed Tomography Dosimetry and dose Risks - Research Paper ExampleCardiac DECT scan was performed by using potential clinical communications protocol (GSI 15 imaging protocol, 64 sections at 0.625-mm collimation, alternating energy between 80 kVp and 140 kVp, 640 mA, 0.6-second supply rotation). Absorbed organ doses were measured by using an adult male breast (female breast attached) anthropomorphous phantom and metal oxide semiconductor field effect transistor detectors (MOSFET), and were obtained also by the computational system based on the Monte Carlo simulation (Im-PACT calculator). The MOSFET dosimeters were evaluated for reproducibility, linearity, energy, and angular habituation. Our results indicated that the MOSFET dosimeter has excellent linearity within symptomatic dose ranges, but in low dose regions, the values are less reliable. The energy dependence was about 7% at tube potentials from 80 kV to 140 kV. The results from performing GSI 15 protocol Im-PACT calcul ator showed that the breast, lung, stomach, and esophagus had the highest recorded absorbed organ doses. For the same organs, the MOSFET does measurements were consistently lower than the calculated doses by Im-PACT. The estimates of radiation risk in this study are relatively small for any individual patient. The roentgen ray Computed Tomography technology has become the method of choice for most diagnostic imaging procedures due to the curious advances over the past few decades, contributing to the improvement of diagnostic image quality and the reduction of interrogatory time and cost (AAPM 23, 2008, the International Commission on Radiological Protection Publication (ICRP) 103, 2007, Huda et al, 2008). This has led to a rapid increase in using the CT scanners around the world. In the United States alone, 62 gazillion CT scans were performed in 2006, of which 4 million were for children (Brenner & Hall, 2007). In Japan, there are 91 scanners per million stack (Coach, 2008).