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http://dx.doi.org/10.9718/JBER.2018.39.3.116

Optimization of Brain Computed Tomography Protocols to Radiation Dose Reduction  

Lee, Jae-Seung (Research Institute of R&D Center, Segei Inspection Engineering Technology Co., Ltd.)
Kweon, Dae Cheol (Department of Radiological Science, College of Bioecological Health, Shinhan University)
Publication Information
Journal of Biomedical Engineering Research / v.39, no.3, 2018 , pp. 116-123 More about this Journal
Abstract
This study is a model experimental study using a phantom to propose an optimized brain CT scan protocol that can reduce the radiation dose of a patient and remain quality of image. We investigate the CT scan parameters of brain CT in clinical medical institutions and to measure the important parameters that determine the quality of CT images. We used 52 multislice spiral CT (SOMATOM Definition AS+, Siemens Healthcare, Germany). The scan parameters were tube voltage (kVp), tube current (mAs), scan time, slice thickness, pitch, and scan field of view (SFOV) directly related to the patient's exposure dose. The CT dose indicators were CTDIvol and DLP. The CT images were obtained while increasing the imaging conditions constantly from the phantom limit value (Q1) to the maximum value (Q4) for AAPM CT performance evaluation. And statistics analyzed with Pearson's correlation coefficients. The result of tube voltage that the increase in tube voltage proportionally increases the variation range of the CT number. And similar results were obtained in the qualitative evaluation of the CT image compared to the tube voltage of 120 kVp, which was applied clinically at 100 kVp. Also, the scan conditions were appropriate in the tube current range of 250 mAs to 350 mAs when the tube voltage was 100 kVp. Therefore, by applying the proposed brain CT scanning parameters can be reduced the radiation dose of the patient while maintaining quality of image.
Keywords
Brain; Computed tomography; Radiation dose; Phantom; Protocol;
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1 C. McCann, and H. Alasti, "Comparative evaluation of image quality from three CT simulation scanners," J. Appl. Clin. Med. Phys., vol. 5, no. 4, pp. 55-70, 2004.
2 International Commission on Radiological Protection (ICRP), "The 2007 Recommendations of the International Commission on Radiological Protection," ICRP Publication No.103, Ann. ICRP 37(2-4), 2007.
3 R.H. Hyndman, and Y. Fan, "Sample quantiles in statistical packages," Am. Stat., vol. 50, no. 4, pp. 361-365, 1996.
4 American Association of Physicists in Medicine (AAPM), "Phantoms for Performance Evaluation and Quality Assurance of CT Scanners," AAPM report No. 1, New York, Am Inst Phys, Diagnostic Radiology Committee Task Force on CT Scanner Phantoms, 1977.
5 S.P. Raman, M. Mahesh, R.V. Blasko RV, and E. K. Fishman, "CT scan parameters and radiation dose: practical advice for radiologists," J. Am. Coll. Radiol., vol. 10, no. 11, pp. 840-846, 2013.   DOI
6 T. Kubo, Y. Ohno, H.U. Kauczor, and H. Hatabu, "Radiation dose reduction in chest CT-review of available options," Eur. J. Radiol., vol. 83, no. 10, pp. 1953-1961, 2014.   DOI
7 M. Mahesh, and E.K. Fishman, "CT dose reduction strategy: to modulate dose or not in certain patients?," J. Am. Coll. Radiol., vol. 9, no. 12, pp. 931-932, 2012.   DOI
8 D. Teunen, "The European Directive on health protection of individuals against the dangers of ionising radiation in relation to medical exposures (97/43/EURATOM)," J. Radiol. Prot., vol. 18, no. 2, pp. 133-137, 1998.   DOI
9 National Research Council (NRC), "Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation," Health risks from exposure to low levels of ionizing radiation: BEIR VII phase 2, Washington DC: National Academies Press, 2006.
10 United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEA), "Effect of ionizing radiation: UNSCEAR 2006 report to the general assembly with scientific annexes," Vienna: United Nations, 2006.
11 D.J. Brenner, and E.J. Hall, "Computed tomography: an increasing source of radiation exposure," N. Engl. J. Med., vol. 357, no. 22, pp. 2277-2284, 2007.   DOI
12 J.J. You, W. Levinson, and A. Laupacis, ":Attitudes of family physicians, specialists and radiologists about the use of computed tomography and magnetic resonance imaging in Ontario," Healthc. Policy, vol. 5, no. 1, pp. 54-65, 2009.
13 G.T. Herman, "Fundamentals of computerized tomography: Image reconstruction from projection," 2nd edit., Springer, pp. 89-92, 2009.
14 KSMIT, "Textbook of Computed Tomography," 3rd edit., The Korean Society of Medical Imaging Technology (KSMIT), Chung-Ku Pub., Seoul, pp. 537, 2013.
15 A. Gervaise, B. Osemont, S. Lecocq, A. Noel, E. Micard, J. Felblinger, and A. Blum, "CT image quality improvement using adaptive iterative dose reduction with wide-volume acquisition on 320-detector CT," Eur. Radiol., vol. 22, no. 2, pp. 295-301, 2012.   DOI
16 W. Huda, E.M. Scalzetti, and G. Levin, "Technique factors and image quality as functions of patient weight at abdominal CT," Radiology, vol. 217, no. 2, pp. 430-435, 2000.   DOI
17 A.N. Khan, F. Khosa, W. Shuaib, K. Nasir, R. Blankstein, and M. Clouse, "Effect of tube voltage (100 vs. 120 kVp) on radiation dose and image quality using prospective gating 320 row multi-detector computed tomography angiography," J. Clin. Imaging Sci., vol. 31, no. 3, pp. 62, 2013.
18 A.B. Sigal-Cinqualbre, R. Hennequin, H.T. Abada, X. Chen, and J.F. Paul, "Low-kilovoltage multi-detector row chest CT in adults: feasibility and effect on image quality and iodine dose," Radiology, vol. 231, no. 1, pp. 169-174, 2004.   DOI
19 B. Wintersperger, T. Jakobs, P. Herzog, S. Schaller, K. Nikolaou, C. Suess, C. Weber, M. Reiser, and C. Becker, "Aortoiliac multidetector-row CT angiography with low kV settings: improved vessel enhancement and simultaneous reduction of radiation dose," Eur. Radiol., vol. 15, no. 2, pp. 334-341, 2005.   DOI
20 M.K. Kalra, M.M. Maher, T.L. Toth, L.M. Hamberg, M.A. Blake, J.A. Shepard, and S. Saini, "Strategies for CT radiation dose optimization," Radiology, vol. 230, no. 3, pp. 619-628, 2004.   DOI
21 Y. Nakayama, K. Awai, Y. Funama, D. Liu, T. Nakaura, Y. Tamura, and Y. Yamashita, "Lower tube voltage reduces contrast material and radiation doses on 16-MDCT aortography," AJR Am. J. Roentgenol., vol. 187, no. 5, pp. W490-W497, 2006.   DOI
22 C. Hohl, G. Muhlenbruch, J.E. Wildberger, C. Leidecker, C. Suss, T. Schmidt, R.W. Gunther, and A.H. Mahnken, "Estimation of radiation exposure in low-dose multislice computed tomography of the heart and comparison with a calculation program," Eur Radiol, Vol. 16, No. 8, pp. 1841-1846, 2006.   DOI
23 S. Trattner, G.D.N, Pearson, C. Chin, D.D. Cody, R. Gupta, C.P. Hess, M.K. Kalra, J.M. Jr. Kofler, M.S. Krishnam, and A.J. Einstein, "Standardization and optimization of CT protocols to achieve low dose," J. Am. Coll. Radiol., vol. 11, no. 3, pp. 271-278, 2014.   DOI
24 K.J. Chang, D.B. Caovan, D.J. Grand, W. Huda, and W.W. Mayo-Smith, "Reducing radiation dose at CT colonography: decreasing tube voltage to 100 kVp," Radiology, vol. 266, no. 3, pp. 791-800, 2013.   DOI
25 S. Yamamura, S. Oda, M. Imuta, D. Utsunomiya, M. Yoshida, T. Namimoto, H. Yuki, M. Kidoh, Y. Funama, H. Baba, and Y. Yamashita, "Reducing the radiation dose for CT colonography: Effect of low tube voltage and iterative reconstruction," Acad. Radiol., vol. 23, no. 2, pp. 155-162, 2016.   DOI
26 D.S. Sharma, S.D. Sharma, K.K. Sanu, S. Saju, D.D. Deshpande, and S. Kannan, "Performance evaluation of a dedicated computed tomography scanner used for virtual simulation using in-house fabricated CT phantoms," J. Med. Phys., vol. 31, no. 1, pp. 28-35, 2006.   DOI