Motion artifacts in kidney stone imaging using single-source and dual-source dual-energy CT scanners: a phantom study.
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 s...
| Publicado en: | Abdominal Imaging Vol. 40; no. 8; pp. 3161 - 3168 |
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| Autores principales: | , , , , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Springer Nature
Oct2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=110653805&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 110653805 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09428925 O52 jtl: Abdominal Imaging issn: 09428925 maglogo: N pubinfo: dt: Oct2015 vid: 40 iid: 8 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 110653805 110653805 NLM26318750 110653805 10.1007/s00261-015-0530-9 NLM26318750 110653805 ppf: 3161 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Motion artifacts in kidney stone imaging using single-source and dual-source dual-energy CT scanners: a phantom study. aug: au: Ibrahim, El-Sayed Cernigliaro, Joseph Pooley, Robert Williams, James Haley, William Ibrahim, El-Sayed H Cernigliaro, Joseph G Pooley, Robert A Williams, James C Haley, William E affil: Mayo Clinic, 4500 San Pablo Rd Jacksonville 32224 USA sug: subj: Tomography, X-Ray Computed Equipment and Supplies Kidney Calculi Radiography Tomography, X-Ray Computed Methods Artifacts Reproducibility of Results Equipment and Supplies Motion Phantoms, Imaging Human ab: 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 < 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. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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