Dual-energy CT in the obese: a preliminary retrospective review to evaluate quality and feasibility of the single-source dual-detector implementation

Abdominal Radiology
Noah E AtwiAran M Toshav

Abstract

To determine the feasibility of performing dual-energy CT with a single-source spectral detector system in obese patients. Retrospective, IRB-approved review of 28 patients weighing ≥ 270 lbs (122 kg) who underwent CT of the abdomen on a single-source spectral detector system was performed. Two blinded, independent radiologists rated relative preference between conventional CT images taken at 120 kVp (CCT120) and monoenergetic 70 keV equivalent (MonoE70) as well as iodine map image quality in the spleen, pancreas, kidneys, and liver. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were compared between conventional CT and MonoE70 images and correlated with body habitus markers of weight, height, and abdominal diameter. MonoE70 images were preferred by radiologists 100% of the time (1-sample t test, p < 0.0001) over conventional CCT120 images. Noise was significantly lower; SNR and CNR were significantly higher in MonoE70 images than in CCT120 images (paired t tests, p < 0.0001). Mean iodine map rating (scale 1-5) was 4.54 ± 0.58, denoting near homogenous and complete iodine mapping through the spleen, pancreas, kidneys, and liver for the majority of patients. Body habitus markers were not significantly correlated ...Continue Reading

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Citations

Jun 6, 2020·Physics in Medicine and Biology·Shengzhen TaoShuai Leng
Nov 20, 2020·European Radiology·Shanigarn ThiravitAchille Mileto
Feb 20, 2021·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Anushri ParakhAvinash R Kambadakone
Jan 22, 2020·Radiology. Artificial Intelligence·Carl F Sabottke, Bradley M Spieler

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