Dual source CT angiography with low kVp and low volume of isotonic contrast material for head and neck arteries: a preliminary study
WU Honglin
LI Jun
LI Hongyao
WEI Wenfeng
JIANG Lanzhi
WANG Dehang
Abstract：Objective To evaluate the image quality and radiation dose of craniocervical CT angiography (CTA) using low tube voltage and low volume of isotonic contrast material (CM).Methods A total of sixty patients who underwent craniocervical CTA were randomly assigned into 2 groups (each with 30 cases): gorup A with 80/Sn140 kVp and 32 ml of 270 mgI/ml CM, and group B with 100/Sn140 kVp and 40 ml of 370 mgI/ml CM.The CT attenuation, effective dose (ED), image noise, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of each arterial segment were compared between the two protocols using the Student t test.Qualitative analysis between the protocols was also performed.Results Both groups of CTA achieved comparable CT attenuation, image noise, SNR and CNR in each arterial segment, except for the image noise of ascending aorta (P<0.01).Using the double low-dose mode, the ED was reduced by about 23.8 % (P<0.001), and iodine intake of patients in group A was reduced by 41.6%.There was no significant difference in image quality between the two groups (P=0.844).The consistency between the two observers was good (kappa value=0.663, P<0.001).Conclusion In craniocervical dual source CTA, using low tube voltage and and low volume of isotonic CM not only provided images of diagnostic quality but also reduced both radiation dose and iodine intake.
Keywords：CraniocervicalLow tube voltageLow contrast materialRadiation dosageTomographyX-ray computed
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1213-1217 )