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

El Sayed H Ibrahim, Joseph G. Cernigliaro, Robert A. Pooley, James Williams, William E. Haley

Research output: Contribution to journalArticle

3 Scopus citations


Purpose: 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. Methods: 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. Results: 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 

Original languageEnglish (US)
Pages (from-to)3161-3167
Number of pages7
JournalAbdominal Imaging
Issue number8
StatePublished - Oct 1 2015



  • Dual-energy computed tomography
  • Kidney stones
  • Motion artifacts
  • Nephrolithiasis

ASJC Scopus subject areas

  • Gastroenterology
  • Urology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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