Journals Information
Universal Journal of Medical Science(CEASE PUBLICATION) Vol. 4(3), pp. 102 - 107
DOI: 10.13189/ujmsj.2016.040304
Reprint (PDF) (555Kb)
Consequences of the Patient's Mis-centering on the Radiation Dose and Image Quality in CT Imaging 鈥� Phantom and Clinical Study
L. Sukupova 1,*, D. Vedlich 2, F. Jiru 2
1 Director Department, Institute for Clinical and Experimental Medicine, Czech Republic
2 Department of Radiodiagnostics and Interventional Radiology, Institute for Clinical and Experimental Medicine, Czech Republic
ABSTRACT
The position of the patient highly influences the functioning of the ATCM in CT imaging. The effect of different mis-centerings on the CTDIvol dose was determined during PMMA and water phantom simulations, which were also used for noise assessment. The results show that a 50 mm mis-centering (with the phantom placed above the isocenter) can cause an increase of the CTDIvol by 47 % associated with the lower standard deviation of the HU signal, whilst a -50 mm mis-centering (with the phantom placed below the isocenter) leads to a decrease of the CTDIvol by 35% and is associated with a noisier image. A mean value of the mis-centering determined for 473 patients was -43 mm. A total of 470 of 473 patients were mis-centered below the X-ray tube, which shows an inclination of radiographers to place patients below the isocenter. This inclination was more significant for smaller patients.
KEYWORDS
CT, CTDIvol, Mis-centering
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] L. Sukupova , D. Vedlich , F. Jiru , "Consequences of the Patient's Mis-centering on the Radiation Dose and Image Quality in CT Imaging 鈥� Phantom and Clinical Study," Universal Journal of Medical Science(CEASE PUBLICATION), Vol. 4, No. 3, pp. 102 - 107, 2016. DOI: 10.13189/ujmsj.2016.040304.
(b). APA Format:
L. Sukupova , D. Vedlich , F. Jiru (2016). Consequences of the Patient's Mis-centering on the Radiation Dose and Image Quality in CT Imaging 鈥� Phantom and Clinical Study. Universal Journal of Medical Science(CEASE PUBLICATION), 4(3), 102 - 107. DOI: 10.13189/ujmsj.2016.040304.