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Jung, Myo-Young
- The Research on the Volume of Artificial Structure by the Change of Scan Parameter in CT Inspection
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Authors
Affiliations
1 Department Radiology, Dongshin University, KR
2 Department Radiology Chonnam National University Hospital, KR
1 Department Radiology, Dongshin University, KR
2 Department Radiology Chonnam National University Hospital, KR
Source
Indian Journal of Science and Technology, Vol 9, No 25 (2016), Pagination:Abstract
Background/Objectives: The globular and rectangular artificial structures were prepared in order to compare the actually measured volume with the CT image volume obtained by using modified scan parameters, and to compare the errors of these volumes. Methods/Statistical Analysis: A plastic with 57.3 Mℓ globular artificial structures and a rectangular artificial structure filled with a 1.9 ℓ contrast medium mixed with distilled water at a ratio of 1:20 were placed on a table. The image data of the following conditions were obtained, namely, 5 mm, 3.75 mm, 2.5 mm, 1.25 mm, and 0.625 mm slice thicknesses; 100 kv and 120 kv tube voltages; 100 mA and 200 mA tube currents; 0% and 50% overlapped slice spaces; standard algorithm; and bone scan parameters. Findings: The volume changes in the rectangular artificial structure were less than those in the globular artificial structure. Other than the slice thickness, the effects of slice space, tube voltage, tube current, bone algorithm or standard algorithm on the image quality, and the volumes of the actual model and obtained image were insignificant. The thinner slice of the scan parameter enhanced the volume accuracy of the obtained image, while the thicker slice reduced the image distortion and accuracy. Application/Improvements: CT image accuracy and optimization are significantly dependent on the slice space. Therefore, a thin slice is absolutely required to obtain accurate CT images that are used for facial and cranial measurement in forensic medicine and dentistry, tests for restoration, liver transplant, and artificial joint tests.Keywords
Artificial Structure, CT Inspection, CT Parameter, CT Volume, Slice Thicknesses.Full Text
- Correlations Analysis of the Entrance Surface Dose According to the BMI at Computed Tomography and Angiography in Cardiovascular Examination
Abstract Views :192 |
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Authors
Affiliations
1 Dept. of Radiology Science, Dongshin University, Jeonnam, KP
1 Dept. of Radiology Science, Dongshin University, Jeonnam, KP
Source
Research Journal of Pharmacy and Technology, Vol 11, No 1 (2018), Pagination: 337-341Abstract
Background/Objectives: The purpose of this study was to investigate the correlation between the entrance surface dose (ESD) and the patient’s body mass index (BMI) in coronary angiography (CAG) of the cardiovascular center and coronary computed tomography angiography (CCTA).
Methods/Statistical analysis: This study was conducted on 300 patients (CAG 100 persons; CTA 200 persons), who underwent CAG and CCTA in this hospital from December 2012 to March 2017. To analyze the ESD, the CTDIvol value was obtained from CCTA, and the air kerma value was obtained from CAG for retrospective analysis. CCTA was conducted using the prospective ECG gating technique (PGT) and the retrospective ECG gating technique (RGT).
Findings: In the cardiovascular lesion examinations, PGT showed a higher ESD compared to RGT, but the difference was not statistically significant (403.8±118.7 vs. 384.7±117.4, P=0.553). In the correlation between BMI and ESD, there were statistically significant differences among the three groups (PGT, RGT, and CAG) (p<0.05). In the linear relationship examined with a scatter plot, the dose in CAG increased with the increase in BMI (R2=0.144, p<0.001), but the doses in PGT (R2=0.04, p<0.05) and RGT (R2=0.144, p<0.05) decreased with the increase in BMI.
Improvements/Applications: Although the dose of CAG tended to increase with the increase in the patient’s BMI, the dose of CCTA tended to decrease inversely. Therefore, BMI may be used as the criterion for the selection of an appropriate examination considering the exposure dose.
Keywords
Coronary Angiography (CAG), Body Mass Index (BMI), Entrance Surface Dose (ESD), Coronary Computed Tomography Angiography (CCTA), Prospective ECG Gating Technique (PGT).
References
- M. Francone, A. Napoli, I. Carbone, Noninvasive imaging of the coronary arteries using a 64-row multidetector CT scanner: initial clinical experience and radiation dose concerns. Radiology Medical, 2007, 112(1), pp. 31-46.
- CH. McCollough, AN. Primak, O. Saba, Dose performance of a 64-channel dual-source CT scanner. Radiology, 2007, 243(3), pp. 775-784.
- S. Baumuller, S. Leschka, L. Desbiolles, Dual-source versus 64-section CT coronary angiography at lower heart rates, Comparison of accuracy and radiation dose. RSNA, Radiology, 2009, 253(1), pp. 56-64.
- J. Haunleiter, T. Meyer, M. Hadamitzky, Radiation dose estimates from cardiac multislice computed tomography in daily practice impact of different scanning protocols on effective dose estimates. Circulation, 2006, 113, pp. 1305-1310.
- P. Stolamann, H. Scheffel, T. Schertler, Radiation dose estimates in dual-source computed tomography coronary angiography. European Radiology, 2008, 18(3), pp. 592-599.
- JP. Earls, EL. Berman, BA. Urban, Prospectively gated transverse coronary CT angiography versus retrospectively gated helical technique: Improved image quality and reduce radiation dose. Radiology, 2008, 246(3), pp. 1081-1086.
- W. S. Yang, S. G. Sin, J. H. Park, “Evaluate the diagnostic accuracy in the assessment of coronary artery stenoses using MDCT”, Journal of the Korean Society of Radiology, 2012, 6(4), pp. 275-279.
- Y. H. Seo, J. B. Han, N. G. Choi, J. N. Song, Analysis on the Entrance Surface Dose and Contrast Medium Dose at computed Tomography and Angiography in Cardiovascular Examination. Journal of Radiological Science and Technology, 2016, 39(4), pp. 1-7.
- H. J. Kim, I. B. Moon, J. B. Han, N. G. Choi, S. J. Jang, “Evaluation of Radiation Dose and Image Quality Between Manual and Automatic Exposure Control Mode According to Body Mass Index in Cardiac CT. Korea Contents Association Review, 2013, 13(4), pp. 290-299.
- Y. H. Kang, Comparison of Radiation Doses between 64-slice Single Source and 128-slice Dual Source CT Coronary Angiography in patient. Journal of the Korean Society Radiology, 2012, 6(2), pp. 129-136.
- Boos J, Lanzman RS, Meinek A, Heusch P, Sawicki LM, Antoch G, Kropil P, “Dose monitoring using the DICOM structured report: assessment of the relationship between cumulative radiation exposure and BMI in abdominal CT. US National Library of Medicine, 2015, 70(2), pp. 82-176.
- D. H. Kim, S. J. Ko, S. S. Kang, J. H. Kim, S. Y. Choi, C. S. Kim, Evaluation of Image Quality and dose with the Change of kVp and BMI in the LiverCT. Journal of the Korean Society Radiology, 2013, 13(6), pp. 331-338.
- P. Stolzmann, H. Scheffel, T. Schertler, T. Frauenfelder, S. Leschka, L. Husmann, T. G. Flohr, B. Marindk, P. A. Kaufmann, H. Alkadhi, “Radiation dose estimates in dual-source computed tomography coronary angiography. European Radiology, 2008, 18(3), pp. 592-599.
- B. Jung, A. H. Mahnken, A. Stargardt, J. simon, T. G. Flohr, S. Schaller, R. Koos, R. W. Gunther, H. E. Wildberger, Individually weight-adapted examination protocol in retrospectively ECG-gated MSCT of the heart. European Radiology, 2003, 13(12), pp. 2560-2566.
- J. W. Jeong, G. J. Shin, Clinical echovardiograph. Korea Society of Echocardiography., Seoul, 2008, pp. 394-416.
- Stevens J, Ethnic-specific revision of body mass index cutoffs to define overweight and obesity in Asians are not warranted. International Journal of Obesity, 2003, 27, pp. 1297-1299.
- F. Razak, SS. Anand, H. Shannon, V. Vuksan, B. Davis, R. Jacobs, Defining Obesity Cut Points in a Multiethnic Population. Circulation, 2007, 115, pp. 2111-2118.
- J. H. Park, Measuring BMI Cutoff Points of Korean Adults Using Morbidity of BMI-related Diseases. Institute of Health Policy and Management, 2011, 20(1), pp. 36-43.
- Y. G. Kim, Body mass index and CT image quality and radiation exposure in coronary angiography Comparison. Korean Journal of Radiology, 2008, 190, pp. 777-784.
- http://www.kocw.net/home/cview.do?lid=8b667c843c7fff26.