caa a22 4500 605494851 CHVBK 20210128100528.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00261-015-0530-9 doi (NATIONALLICENCE)springer-10.1007/s00261-015-0530-9 Motion artifacts in kidney stone imaging using single-source and dual-source dual-energy CT scanners: a phantom study [Elektronische Daten] [El-Sayed Ibrahim, Joseph Cernigliaro, Robert Pooley, James Williams, William Haley] 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 140kVp 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<0.0001). Stone size was not a factor in stone misclassification under motion. Stone type was not a factor in stone misclassification under motion with SS-DECT, although with DS-DECT, cystine showed higher number of stone misclassification. Conclusions: Motion artifacts could result in stone misclassification in DECT. This effect is more pronounced in SS-DECT versus DS-DECT, especially if stones of different types lie in close proximity to each other. Further, possible misinterpretation of the number of stones (i.e., missing one, or thinking that there are two) in DS-DECT could be a potentially significant problem. Springer Science+Business Media New York, 2015 Motion artifacts nationallicence Dual-energy computed tomography nationallicence Kidney stones nationallicence Nephrolithiasis nationallicence Ibrahim El-Sayed Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut Cernigliaro Joseph Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut Pooley Robert Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut Williams James Indiana University, 340W 10th St, 46202, Indianapolis, IN, USA aut Haley William Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/8(2015-10-01), 3161-3167 0942-8925 40:8<3161 2015 40 261 https://doi.org/10.1007/s00261-015-0530-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00261-015-0530-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ibrahim El-Sayed Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut NATIONALLICENCE 700 1- Cernigliaro Joseph Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut NATIONALLICENCE 700 1- Pooley Robert Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut NATIONALLICENCE 700 1- Williams James Indiana University, 340W 10th St, 46202, Indianapolis, IN, USA aut NATIONALLICENCE 700 1- Haley William Mayo Clinic, 4500 San Pablo Rd, 32224, Jacksonville, FL, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/8(2015-10-01), 3161-3167 0942-8925 40:8<3161 2015 40 261