Published in:
01-01-2021 | Urolithiasis | NEW IMAGING TECHNIQUES (S Rais-Bahrami and K Porter, Section Editors)
Dual-Energy CT for Urinary Stone Evaluation
Authors:
Alex Nourian, Eric Ghiraldi, Justin I. Friedlander
Published in:
Current Urology Reports
|
Issue 1/2021
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Abstract
Purpose of Review
Conventional CT imaging is an excellent tool for the diagnosis of nephrolithiasis however is limited in its ability to detect stone composition. Dual-energy CT (DECT) scans have demonstrated promise in overcoming this limitation. We review the current utility of DECT in nephrolithiasis.
Recent Findings
DECT is superior to conventional CT in differentiating uric acid stones from non-uric acid stones, with numerous studies reporting sensitivities and specificities approaching > 95%. Dose reduction protocols incorporating low-dose CT scans are commonly used, providing significantly lower effective radiation doses compared to conventional CT. DECT remains an effective diagnostic tool in patients with large body habitus.
Summary
DECT can accurately detect uric acid stones, which can help guide which stones may be suitable to medical dissolution. Further studies evaluating the effectiveness of DECT in guiding management of patients with nephrolithiasis can help to promote its widespread use.