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C-0576 - Effective energy evaluation of 320-multidetector CT using Radiochromic Film

T. Gotanda1, T. Katsuda2, T. Akagawa3, Y. Kawaji1, R. Gotanda4, N. Tanki5, T. Kuwano6, T. Shimono1, A. Tabuchi7; 1 Fukuoka/JP 2 Sakai/JP 3 Tokushima/JP 4 Ibaraki/JP 5 Kobe/JP 6 Okayama/JP 7 OKAYAMA/JP Type: Scientific Exhibit
Area of Interests: Radioprotection / Radiation dose, Radiation physics
Imaging Technique: CT
Procedures: Dosimetry, Physics
Special Focus: Quality assurance
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Aims and objectives: The effective energy of X-ray beams is one of a number of standard quality assurance (QA) and quality control (QC) tests for various X-ray imaging systems [1]. In the radiation quality management of the 320-multidetector Computed Tomography (CT), the half-value layer (HVL), which is used to calculat[...]

Methods and materials: 1.    GAFCHROMIC EBT3 Dosimetry film The EBT3 film is rectangular in shape with dimensions of 8 in. × 10 in. (20.5 cm × 25.5 cm), and is yellow before irradiation. EBT3 film is suitable for the absorbed dose measurement in the diagnostic range because it is recommended for dosimetry over a[...]

Results: Figure 4 shows the density profile curve with each ROI for Al thickness from the SSAl filter area, the full exposure areas, and the unexposed areas. The center of the profile curve corresponded to high density and it was flanked by regions of low density, because of wedge filter of the 320-multidete[...]

Conclusion: There is no standard method to measure the effective energy of the 320-multidetector CT. It was considered that the method using EBT3 and the SSAl was able to be measured with similar precision in the 320-multidetector CT, because it was able to be measured with precision of less than 5% in general [...]

Personal information: Tatsuhiro Gotanda Ph.D. Associate Professor   Department of Radiological Science,    Faculty of Health Sciences    Junshin Gakuen University    1-1-1 Chikushigaoka, Minami-ku, Fukuoka 815-8510 Japan    E-mail: gotanda.t@junshin-u.ac.jp   [...]

References: 1.      S.J. Shepard, P.P. Lin, J.M. Boone, D.D. Cody, J.R. Fisher, G.D. Frey, H. Glasser, J.E. Gray, A.G. Haus, L.V. Hefner, R.L. Holmes, R.J. Kobistek, F.N. Ranallo, P.L. Rauch, R.P. Rossi, J.A. Seibert, K.J. Strauss, O.H. Suleiman, J.R. Schenck, S.K. Thompson, 2002, QUALITY CO[...]

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