Comparison of image quality and radiation exposure between conventional imaging and gemstone spectral imaging in abdominal CT examination

The British Journal of Radiology
Tianqi FangBingsheng Huang

Abstract

To compare patients' image quality and radiation exposure between gemstone spectral imaging (GSI) with rapid kV switching technique and conventional polychromatic imaging (CPI) performed in abdominal CT examinations. Adult patients who were referred to abdominal CT from October 2015 to March 2016 were enrolled. Unenhanced CT with CPI mode and tri-phase (arterial/portal/delayed phase) contrast-enhanced scan with GSI mode were performed with different protocols respectively. Regions of interest (ROIs) were drawn on muscle and fat. Parametric results of the image noise, signal-to-noise ratio (SNR) and clinical image quality in these regions between the monochromatic images reconstructed at 65 keV and conventional polychromatic images were compared. Radiation dose was also compared between CPI and GSI. 43 patients were recruited. Compared to conventional imaging, the noise level was generally not significantly different between GSI images in arterial phase and portal phase, and significantly higher (around 10%) in delayed phase. The SNR of GSI in portal phase was significantly higher than that of conventional imaging, and was similar between arterial phase/delayed phase and conventional imaging. The clinical image quality between c...Continue Reading

References

Aug 1, 1989·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·H SvanholmS Olsen
Jul 20, 2011·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Alvin C SilvaWilliam Pavlicek
Nov 1, 2012·AJR. American Journal of Roentgenology·Tobias HeyeDaniel T Boll

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Citations

Jan 28, 2021·Diagnostics·Masakatsu TsurusakiMasatoshi Kudo

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