|Seon-Chil Kim||Department of Radiologic Technology, Daegu Health College, Daegu 702-722, Korea|
|Hong-Moon Jung||Department of Radiologic Technology, Daegu Health College, Daegu 702-722, Korea|
In modern medicine, a radiation scans is an very important examination tool for making a diagnosis and subsequent treatment plan. Among the range of medical examinations, Computed tomography (CT) is being performed in an increasing number of cases and a CT scan uses the most radiation of any diagnostic exam. On the other hand, radiation protection during scanning is not typical for bodily regions other than those designated for examination. Therefore, the aim of this study was to develop a lead-free fused radiation shielding fiber (RSF) and to evaluate its effectiveness with a view to reducing radiation exposure to only the effective dose or less in a CT scan by means of a multilayer structural coating. A GE High Speed Advantage Spiral CT was used to conduct measurements using a FH-40G (Eberline, USA) proportional digital counter survey meter. In a brain CT scan, abdominal CT scan, and knee CT scan, two-way ANOVA was used to analyze the changes in radiation dosage and to examine the correlation based on body parts and thickness of the RSF. In addition, when significant results were obtained, a Duncan post hoc test was used to examine the difference depending on each condition. In the brain CT scan, the highest exposure to secondary radiation was measured in the chest, which was closest in distance. The use of a 3- mm shielding fiber resulted in a shielding effect of approximately 65% shielding effect compared to the initial exposure dose. In the abdominal CT scan, no exposure dose was detected in the head area, which had been shielded with the 3-mm shielding fiber. In a knee CT scan, 1-mm shielding fiber was sufficient to demonstrate a shielding effect. The RSF developed in this study may help reduce low-dose exposure to secondary X-rays, such as scattered rays.
Barium, Computed tomography, Lead-free;, Radiation shielding fiber
Brenner, D.J., Hall, E.J., Engl, N., 2007. Computed Tomography- An Increasing Source of Radiation Exposure, N. Engl. J.Med. J. Med. Volume 357, pp. 2277-2284.
Choi, T.J., Oh, Y.K., Kim, J.H., Kim, O.B., 2010. Radiation Exposure from Medical Imaging Procedures. J. Korean Phys. Soc. Volume 21(2), pp. 232-237.
Dong, K.R., Ji, Y.S., Kim, C.B., Choi, S.K., Moon, S.I., Dieter, K., 2009. Medical Radiation Shielding Effect by Composition of Barium Compounds. J. Radiol. Sci.Technol. Volume 32, pp. 53-58.
Dong, K.R., Kweon, D.C., Chung, W.K., Goo, E.H., Dieter, K., Choe, C.H., 2011. Study on the Angular Dependence of Personal Exposure Dosimeter – Focus on Thermoluminescent Dosimeter and Photoluminescent Dosimeter. Ann. Nucl. Energy, Volume 38, pp. 383-388.
Kann, J.I.O., Japan Intellectual Property Office Patent Gazette, 1999. Radiation Shielding Sheet, Number 11-133184, (Patent).
Kann, J.I.O., Japan Intellectual Property Office Patent Gazette, 2007. Process of Radiation Shielding Sheet Number 2007-85865.
Kim, S.C., Park, M.H., 2010. Development of Radiation Shield with Environmentally-friendly Materials; I: Comparison and Evaluation of Fiber, Rubber, Silicon in the Radiation Shielding Sheet. Journal Radiol Sci. Technol., Volume 33, pp. 121-126.
Kim, S.K., Dong, K.R., Chung, W.K., 2012. Performance Evaluation of a Medical Radiation Shielding Sheet with Barium as an Environment-friendly Materials. J Korean Phys. Soc., Volume 60, pp. 165-170.
Kim, Y.J., Korean Intellectual Property Office Patent Gazette (A), 2009. Radiation Shielding Fabric, Number 10-2009-0011082, (patent).
Kim, Y.J., Korean Intellectual Property Office Patent Gazette (A), 2008. Radiation Shielding Fabric, Number 10-08600332, (patent).
Kim, Y.K., Jang, Y.I., Kim, J.M., 2003. The Weight of the Apron for Radiation Protection and Shielding Performance Improvement. Journal of Radiol. Sci.Tech., Volume 26, pp.45-51.
Korean Industrial Safety Association, 1995. The Security Counter Plan about the Lead Poisoning, KISA-Health-05.
Korean Intellectual Property Office Patent Gazette (A), 2000. Barium Sulfate Fiber and Manufacturing Method of Radiation Shielding , Number 2000-0007084.
Korean Standards Association, 2005. Testing Method of Lead Equivalent for X-ray Protective Devices, KS A 4025.
Lee, J.W., Korean Intellectual Property Office Patent Gazette (A), 2001. Excellent X-ray Shielding Textile Products and Its Manufacturing Method, Number 2001-0056190.
Mettler, F.A., Wiest, P.W., Locken, J.A., Kelsey, C.A., 2000. CT Scanning Patterns of Use and Dose, J. Radiol. Prot., Volume 20, pp. 353-359.
Redus, R., 2008. XRF Spectra and Spectra Analysis Software, Amptek Application Note XRF-1. Amptek Inc.
United Nations Scientific Committee on the Effects of Atomic Radiation, 2010. Sources and Effects of Ionizing Radiation, ISBN 92-1-142238-8.