Motion artifacts in kidney stone imaging using single-source and dual-source dual-energy CT scanners: a phantom study

Abdominal Imaging
El-Sayed H IbrahimWilliam E Haley

Abstract

Dual-energy computed tomography (DECT) has shown the capability of differentiating uric acid (UA) from non-UA stones with 90-100% accuracy. With the invention of dual-source (DS) scanners, both low- and high-energy images are acquired simultaneously. However, DECT can also be performed by sequential acquisition of both images on single-source (SS) scanners. The objective of this study is to investigate the effects of motion artifacts on stone classification using both SS-DECT and DS-DECT. 114 kidney stones of different types and sizes were imaged on both DS-DECT and SS-DECT scanners with tube voltages of 80 and 140 kVp with and without induced motion. Postprocessing was conducted to create material-specific images from corresponding low- and high-energy images. The dual-energy ratio (DER) and stone material were determined and compared among different scans. For the motionless scans, all stones were correctly classified with SS-DECT, while two cystine stones were misclassified with DS-DECT. When motion was induced, 94% of the stones were misclassified with SS-DECT versus 11% with DS-DECT (P < 0.0001). Stone size was not a factor in stone misclassification under motion. Stone type was not a factor in stone misclassification unde...Continue Reading

References

Jun 1, 1999·AJR. American Journal of Roentgenology·I BoulayF P Begun
Sep 17, 2005·Kidney International·Christopher S SaigalUNKNOWN Urologic Diseases in America Project
Nov 24, 2007·Academic Radiology·Andrew N PrimakCynthia H McCollough
Feb 22, 2008·AJR. American Journal of Roentgenology·Romain GrosjeanJacques Hubert
May 20, 2008·Primary Care·Elaine M Worcester, Fredric L Coe
Sep 8, 2010·The New England Journal of Medicine·Elaine M Worcester, Fredric L Coe
Apr 14, 2012·European Urology·Charles D ScalesUNKNOWN Urologic Diseases in America Project

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Citations

Mar 25, 2016·Abdominal Radiology·Ravi K Kaza, Joel F Platt
Sep 29, 2020·Frontiers in Oncology·George NoidX Allen Li

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