Abstract
OBJECTIVE. The objective of this prospective study is to evaluate the consistency of renal stone volume estimation using dual-energy CT across scanner model and reconstruction algorithm configurations. SUBJECTS AND METHODS. Patients underwent scanning with routine kidney stone composition protocols on both second- and third-generation dual-source CT scanners. Images were reconstructed using filtered back projection and iterative reconstruction (IR). In addition, a modified IR kernel on the third-generation CT scanner was evaluated. Individual kidney stone volumes were determined and compared. RESULTS. No significant difference was noted in measured volumes between filtered back-projection data, IR data from the second-generation scanner, and the modified IR kernel data (p > 0.05). The third-generation commercially available IR kernel yielded lower volumes than did the other configurations (p < 0.0001). CONCLUSION. With the use of a modified kernel for the third-generation scanner, patients being monitored for changes in kidney stone volume can undergo scanning performed with second- or third-generation dual-energy CT scanners, and the images obtained can be reconstructed with either filtered back projection or IR without the introduction of bias into kidney stone volume measurements.
Original language | English (US) |
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Pages (from-to) | 116-121 |
Number of pages | 6 |
Journal | American Journal of Roentgenology |
Volume | 209 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2017 |
Keywords
- CT
- Iterative reconstruction
- Nephrolithiasis
- Renal stone
- Stone volume
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging