Dual-energy computed tomographic pulmonary angiography: a pilot study to assess the effect on image quality and diagnostic confidence

Journal of Computer Assisted Tomography
Minal J SangwaiyaSubba R Digumarthy

Abstract

The aim of this study was to assess if dual-energy computed tomographic pulmonary angiography (DE-CTPA) protocol performed on a dual-source CT scanner can improve image quality and diagnostic confidence compared with 80- and 140-kilovolt (peak) (kVp) image data sets. In an international review board-approved study, 22 patients (women-men, 12:10; mean [SD] age, 58.5 [16.5] years; age range, 18-85 years) underwent DE-CTPA on a dual-source CT for assessing pulmonary embolism. Scan parameters comprised reference milliampere-second of 140 at 140 kVp and 400 at 80 kVp with a pitch of 1.1- and 1.25-mm reconstructed slice thicknesses, respectively. Two radiologists analyzed the 140-kV, 80-kV, and dual-kilovolt images for vessel contrast, subjective image noise, presence of motion, artifacts, and diagnostic confidence at the level of main, lobar, and segmental or subsegmental pulmonary arteries on a 5-point scale (1, uninterpretable; 5, excellent). Computed tomographic numbers and objective noise were measured in these arteries. Data were analyzed using Student t test, Friedman chi2 analysis of variance, and Wilcoxon rank sum test (with Bonferroni correction). At 80 kVp, regardless of motion artifacts, there was a 104% increase in intra...Continue Reading

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Citations

Jul 26, 2011·AJR. American Journal of Roentgenology·Naama R BogotJacob Sosna
Feb 26, 2013·AJR. American Journal of Roentgenology·John Mayo, Yogesh Thakur
Jul 22, 2010·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Michael MacariDouglas S Katz
Dec 13, 2018·Journal of Computer Assisted Tomography·Hasan ErdoganBahadir Ozturk

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