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Ogawa, Nanako Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Sato, Shuhei Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Ida, Kentaro Department of Radiologic Diagnosis and Interventional Radiology, Fukuyama City Hospital
Kato, Katsuya Department of Diagnostic Radiology, Kawasaki Hospital
Ariyoshi, Yuichi Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Wada, Koichiro Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Nasu, Yasutomo Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Kanazawa, Susumu Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Abstract
The aim of this study was to investigate the utility of single-source dual-energy computed tomography (SS-DECT) composition analysis in characterizing different types of urinary stones and differentiating them from phleboliths. This study included 29 patients with urinary stones who were scheduled for surgery. All patients were scanned, first using single-energy computed tomography acquisition and then DECT acquisition on SS-DECT. Dual-energy data were archived to a Gemstone spectral imaging (GSI) viewer (GE Healthcare, Milwaukee, WI, USA). Hounsfield units (HU) and effective atomic numbers (Zeff) were estimated using the GSI viewer. The results of dual-energy analysis were compared with the biochemical constitution of the stones. The chemical analysis determined that the stones included 32 calcium-based, 6 cystine and 1 struvite stone. Both HU and Zeff values were helpful in differentiating calcium-based stones from cystine and struvite stones and phleboliths. The Zeff values of phleboliths were significantly higher than those for struvite and cystine stones, whereas it was difficult to distinguish phleboliths from struvite and cystine stones using the HU values. Composition analysis using SS-DECT is helpful for distinguishing urinary stone types and discriminating phleboliths from urinary stones. Zeff values may be more useful than HU values for differentiating urinary stones from phleboliths.
Keywords
single-source dual-energy computed tomography
effective atomic number
urinary stone
phlebolith
Amo Type
Original Article
Published Date
2017-04
Publication Title
Acta Medica Okayama
Volume
volume71
Issue
issue2
Publisher
Okayama University Medical School
Start Page
91
End Page
96
ISSN
0386-300X
NCID
AA00508441
Content Type
Journal Article
language
英語
Copyright Holders
CopyrightⒸ 2017 by Okayama University Medical School
File Version
publisher
Refereed
True
PubMed ID