Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol.
The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. A low-dose dual-source DE-CT renal calculi protocol (140 kV, 46 mAs; 80 kV, 210 mAs) was derived from the single-energy (SE) CT protocol used in our institution...
| Published in: | European Radiology Vol. 19; no. 6; pp. 1553 - 1560 |
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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
| Format: | research Journal Article |
| Published: |
Springer Nature
Jun2009
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105531415&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105531415 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Jun2009 vid: 19 iid: 6 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 105531415 39563820 NLM19205704 2010280865 10.1007/s00330-009-1300-2 NLM19205704 105531415 ppf: 1553 ppct: 7 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol. aug: au: Thomas C Patschan O Ketelsen D Tsiflikas I Reimann A Brodoefel H Buchgeister M Nagele U Stenzl A Claussen C Kopp A Heuschmid M Schlemmer HP Thomas, C Patschan, O Ketelsen, D Tsiflikas, I Reimann, A Brodoefel, H Buchgeister, M affil: Department of Diagnostic and Interventional Radiology, University of Tübingen, Tübingen, Germany sug: subj: Absorptiometry, Photon Methods Tomography, X-Ray Computed Methods Urinary Calculi Radiography Female Male Radiation Dosage Reproducibility of Results Sensitivity and Specificity Human Female Male ab: The efficiency and radiation dose of a low-dose dual-energy (DE) CT protocol for the evaluation of urinary calculus disease were evaluated. A low-dose dual-source DE-CT renal calculi protocol (140 kV, 46 mAs; 80 kV, 210 mAs) was derived from the single-energy (SE) CT protocol used in our institution for the detection of renal calculi (120 kV, 75 mAs). An Alderson-Rando phantom was equipped with thermoluminescence dosimeters and examined by CT with both protocols. The effective doses were calculated. Fifty-one patients with suspected or known urinary calculus disease underwent DE-CT. DE analysis was performed if calculi were detected using a dedicated software tool. Results were compared to chemical analysis after invasive calculus extraction. An effective dose of 3.43 mSv (male) and 5.30 mSv (female) was measured in the phantom for the DE protocol (vs. 3.17/4.57 mSv for the SE protocol). Urinary calculi were found in 34 patients; in 28 patients, calculi were removed and analyzed (23 patients with calcified calculi, three with uric acid calculi, one with 2,8-dihyxdroxyadenine-calculi, one patient with a mixed struvite calculus). DE analysis was able to distinguish between calcified and non-calcified calculi in all cases. In conclusion, dual-energy urinary calculus analysis is effective also with a low-dose protocol. The protocol tested in this study reliably identified calcified urinary calculi in vivo. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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