Journals Information
Universal Journal of Medical Science(CEASE PUBLICATION) Vol. 1(4), pp. 86 - 93
DOI: 10.13189/ujmsj.2013.010402
Reprint (PDF) (803Kb)
Reduced Dose with Maintained Image Quality Utilizing 100 kVp Carotid CT Angiography
Patricia Jo 1, David A Leswick 2,*, Derek A Fladeland 2, Robert Otani 2, Hyun J Lim 3
1 College of Medicine, Department of Diagnostic Imaging, University of Calgary, Calgary, T2N 2T9, Canada
2 College of Medicine, Department of Medical Imaging, Royal University Hospital, University of Saskatchewan, S7N 0W8, Canada
3 College of Medicine, Department of Community Health & Epidemiology, University of Saskatchewan, S7N 5E5, Canada
ABSTRACT
The purpose of this study is to prospectively compare image quality and radiation dose using 100- and 120-kVp techniques for carotid CT angiography. Forty consecutive patients were alternated between the 100 kVp group and 120 kVp group while all other scanning parameters were kept constant. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated for locations along the carotid artery, vertebral artery and circle of Willis. Three radiologists independently assessed subjective image quality including confidence of visualization using a five-point scale. Effective dose was calculated using the dose length product (DLP). CNR and SNR were either similar or better when using 100 kVp for all vessels. Subjective image quality was similar between techniques. Mean effective dose was 36% lower for the 100 kVp than the 120 kVp technique. This study demonstrated that using 100 kVp technique provides 36% dose reduction with significantly higher objective image quality and nonsignificantly higher subjective image quality compared to the 120 kVp technique.
KEYWORDS
Multidetector Computed Tomography, Computed Tomography Angiography, Carotid arteries, Radiation, Radiation dosage
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Patricia Jo , David A Leswick , Derek A Fladeland , Robert Otani , Hyun J Lim , "Reduced Dose with Maintained Image Quality Utilizing 100 kVp Carotid CT Angiography," Universal Journal of Medical Science(CEASE PUBLICATION), Vol. 1, No. 4, pp. 86 - 93, 2013. DOI: 10.13189/ujmsj.2013.010402.
(b). APA Format:
Patricia Jo , David A Leswick , Derek A Fladeland , Robert Otani , Hyun J Lim (2013). Reduced Dose with Maintained Image Quality Utilizing 100 kVp Carotid CT Angiography. Universal Journal of Medical Science(CEASE PUBLICATION), 1(4), 86 - 93. DOI: 10.13189/ujmsj.2013.010402.