Low-Dose CT of the Paranasal Sinuses: Minimizing X-Ray Exposure with Spectral Shaping

European Radiology
Wolfgang WuestM M Lell

Abstract

Shaping the energy spectrum of the X-ray beam has been shown to be beneficial in low-dose CT. This study's aim was to investigate dose and image quality of tin filtration at 100 kV for pre-operative planning in low-dose paranasal CT imaging in a large patient cohort. In a prospective trial, 129 patients were included. 64 patients were randomly assigned to the study protocol (100 kV with additional tin filtration, 150mAs, 192x0.6-mm slice collimation) and 65 patients to the standard low-dose protocol (100 kV, 50mAs, 128 × 0.6-mm slice collimation). To assess the image quality, subjective parameters were evaluated using a five-point scale. This scale was applied on overall image quality and contour delineation of critical anatomical structures. All scans were of diagnostic image quality. Bony structures were of good diagnostic image quality in both groups, soft tissues were of sufficient diagnostic image quality in the study group because of a high level of noise. Radiation exposure was very low in both groups, but significantly lower in the study group (CTDIvol 1.2 mGy vs. 4.4 mGy, p < 0.001). Spectral optimization (tin filtration at 100 kV) allows for visualization of the paranasal sinus with sufficient image quality at a very ...Continue Reading

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Citations

Jan 17, 2017·Neuroradiology·Matthias S MayWolfgang Wuest
Jun 7, 2017·European Journal of Radiology·Alexander A SchegererGunnar Brix
Jan 13, 2018·European Radiology·Saravanabavaan SuntharalingamKai Nassenstein
Jan 18, 2018·American Journal of Rhinology & Allergy·Asitha D L Jayawardena, Rakesh Chandra
Apr 24, 2019·Ear, Nose, & Throat Journal·Peng-Peng WangJi-Hang Sun
Dec 30, 2017·Journal of Computer Assisted Tomography·Berhan PirimogluMecit Kantarci
May 7, 2019·PloS One·Bernhard PetritschThorsten Alexander Bley
Jun 23, 2019·Journal of X-ray Science and Technology·Que KongMin Xie
Nov 27, 2020·European Radiology·Gabriel KellerFabian Springer
Jul 22, 2020·Physics in Medicine and Biology·Shaoyu WangHengyong Yu
Jan 15, 2021·Biomedical Physics & Engineering Express·Mohammad Davoudi, Shaghayegh Lotfian Ahangarkolaei

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