RESEARCH ARTICLE CT Pulmonary Angiography at Reduced Radiation Exposure and Contrast Material Volume Using Iterative Model Reconstruction and iDose4 Technique in Comparison to FBP Azien Laqmani1*, Maximillian Kurfürst1, Sebastian Butscheidt1, Susanne Sehner2, Jakob Schmidt-Holtz1, Cyrus Behzadi1, Hans Dieter Nagel3, Gerhard Adam1, Marc Regier1 1 Department for Interventional and Diagnostic Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, 2 Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, 3 Science & Technology for Radiology, Buchholz, Germany a11111 *
[email protected] Abstract Purpose To assess image quality of CT pulmonary angiography (CTPA) at reduced radiation expo- OPEN ACCESS sure (RD-CTPA) and contrast medium (CM) volume using two different iterative reconstruc- Citation: Laqmani A, Kurfürst M, Butscheidt S, tion (IR) algorithms (iDose4 and iterative model reconstruction (IMR)) in comparison to Sehner S, Schmidt-Holtz J, Behzadi C, et al. (2016) CT Pulmonary Angiography at Reduced Radiation filtered back projection (FBP). Exposure and Contrast Material Volume Using Iterative Model Reconstruction and iDose4 Technique Materials and Methods in Comparison to FBP. PLoS ONE 11(9): e0162429. < doi:10.1371/journal.pone.0162429 52 patients (body weight 100 kg, mean BMI: 23.9) with suspected pulmonary embolism (PE) underwent RD-CTPA (tube voltage: 80 kV; mean CTDIvol: 1.9 mGy) using 40 ml CM. Editor: Gayle E. Woloschak, Northwestern University 4 Feinberg School of Medicine, UNITED STATES Data were reconstructed using FBP and two different IR algorithms (iDose and IMR). Sub- jective and objective image quality and conspicuity of PE were assessed in central, seg- Received: May 25, 2016 mental, and subsegmental arteries.