Two-pass dual-energy CT imaging for simultaneous detection, characterization, and volume measurement of urinary stones with excretory-phase CT urography alone: a phantom study.
Purpose: To evaluate if two-pass dual-energy CT imaging--i.e., simultaneous three-material and two-material decomposition analysis--can depict and characterize urinary stones in various concentrations of iodine solution in vitro.Materials and Methods: Twelve urinary stones were scanned with a dual-s...
| Publicado en: | Japanese Journal of Radiology Vol. 31; no. 6; pp. 393 - 401 |
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| Autores principales: | , , , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Springer Nature
2013 Jun
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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=107905959&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107905959 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 18671071 AUCM jtl: Japanese Journal of Radiology issn: 18671071 maglogo: N pubinfo: dt: 2013 Jun vid: 31 iid: 6 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 107905959 107905959 NLM23645389 2012156282 10.1007/s11604-013-0209-5 NLM23645389 107905959 ppf: 393 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Two-pass dual-energy CT imaging for simultaneous detection, characterization, and volume measurement of urinary stones with excretory-phase CT urography alone: a phantom study. aug: au: Takahashi, Satoru Itoh, Toshihide Niikawa, Hidekazu Shikata, Atsushi Murakami, Emi Tsunoda, Hiroshi Yoshioka, Toshiaki Tsujihata, Masao Yamamoto, Hiroshi affil: Department of Radiology, Sumitomo Hospital, 4-3-20 Nakanoshima, Kita-ku, Osaka, Osaka, 530-0041, Japan, staka@med.kobe-u.ac.jp. sug: subj: Phantoms, Imaging Tomography, X-Ray Computed Methods Urinary Calculi Radiography Urography Contrast Media Diagnostic Use Human Predictive Value of Tests Sensitivity and Specificity ab: Purpose: To evaluate if two-pass dual-energy CT imaging--i.e., simultaneous three-material and two-material decomposition analysis--can depict and characterize urinary stones in various concentrations of iodine solution in vitro.Materials and Methods: Twelve urinary stones were scanned with a dual-source CT scanner. First, each stone (in a saline-filled tube) underwent single- and dual-energy mode CT scans in order to measure the volume of the stone. Each stone was then placed in various concentrations of contrast medium and scanned in dual-energy mode to calculate its volume via three-material decomposition analysis. Two-pass dual-energy CT imaging analysis software for the Matlab environment, which was developed specifically to process simultaneous three-material and two-material decomposition, was applied to characterize and calculate the volume of each stone.Results: Although the virtual non-contrast images from three-material decomposition analysis clearly visualized all of the stones in contrast medium with up to 80 mgI/mL, the volumes of the uric acid stones were overestimated. Two-pass dual-energy CT imaging was able to depict and characterize non-uric-acid stones in diluted contrast medium with up to 80 mgI/mL, whereas uric acid stones were correctly evaluated in diluted contrast medium with 40 mgI/mL or less.Conclusions: Two-pass dual-energy CT imaging is able to depict and characterize urinary stones in contrast medium. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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