Radiation dose reduction effect of tungsten shield during health screening mdct examination Kim Chang-Gyu* Professor, Department of Radiological Science, Gimcheon University, South Korea *Corresponding Author: Chang-Gyu Kim Professor, Department of Radiological Science, Gimcheon University, South Korea Email: radkcg@hanmail.net
Online published on 16 October, 2018. Abstract For health screening MDCT examination, an eco-friendly shield was produced to minimize the radiation dose and to evaluate the usefulness of clinical application and reduction of unnecessary artifacts to obtain final diagnostic medical images with high diagnostic value. The study utilized CT SOMATOM Definition Flash (Simens Medical System, Germany), which can acquire 128-slice images by rotating once, and the scan conditions used for the abdominal examination were the same as those used in clinical examination. To measure the radiation dose of the subject, a human body phantom (Model PBU-31) consisting of human body equivalent material and glass dosimeter Dose Ace (Model GD-352M and FGD-1000) were used. When the shield was used, the mean dose was measured as 1, 847 ± 5.83μGy, and when the tungsten shield was not used, the mean dose was measured as 3, 506 ± 6.25μGy, which resulted in a 47.3% radiation dose reduction efficiency, and the reduction factor was converted to 1.9. The image obtained using an eco-friendly tungsten shield was 4.0 ± 0.2 points, when images were acquired without using a tungsten shield, the result was 4.5 ± 0.2 points, and the quality of the image was highly evaluated when the eco-friendly shield was utilized and there was a statistically significant difference(p<0.05). This result is expected to be widely used to reduce the radiation dose of medical radiation by presenting the data for predicting the radiation dose of the patient during the health screening chest CT and determining the examination method. Top Keywords MDCT, Radiation dose, Image quality, Glass dosimeter, Shielding. Top |