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CT arthrography: in vitro evaluation of single and dual energy for optimization of technique.
- Source :
-
Skeletal radiology [Skeletal Radiol] 2010 Oct; Vol. 39 (10), pp. 1025-31. Date of Electronic Publication: 2010 Apr 25. - Publication Year :
- 2010
-
Abstract
- The purpose of this study was to optimize CT arthrography technique and determine if dual energy CT (DECT) can provide any benefit over single energy CT (SECT). Iodinated contrast attenuation at different concentrations was measured using DECT and SECT at different beam energies (140, 120, and 80 kVp). Dose and noise were measured on phantoms at different tube currents. Three bovine femoral condyles with artificially created cartilage defects were scanned with dose-equivalent protocols. Contrast-to-noise ratio (CNR) between cartilage and iodine was measured, and the appearance of cartilage defects was graded by two readers. DECT scans were post-processed for iodine quantification. The beam energy 80 kVp had the highest iodine signal, 50% greater than DECT, 75% greater than 120 kVp, and 100% greater than 140 kVp. Noise was nearly identical for all techniques when dose was matched. The 80 kVp level had the highest CNR, 25% higher than 120 kVp and DECT, and 33% greater than 140 kVp. The 80 kVp technique was also preferred by both readers. DECT iodine quantification was significantly limited by the post-processing application, noise, and beam hardening. In this in-vitro study, the SECT 80 kVp CT arthrography technique was superior to currently performed 120 and 140 kVP SECT techniques and DECT.
- Subjects :
- Animals
Cadaver
Cattle
Contrast Media
Femur Neck diagnostic imaging
Humans
In Vitro Techniques
Iohexol analogs & derivatives
Knee Joint diagnostic imaging
Observer Variation
Phantoms, Imaging
Radiographic Image Enhancement methods
Arthrography methods
Image Processing, Computer-Assisted methods
Tomography, X-Ray Computed methods
Subjects
Details
- Language :
- English
- ISSN :
- 1432-2161
- Volume :
- 39
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Skeletal radiology
- Publication Type :
- Academic Journal
- Accession number :
- 20419450
- Full Text :
- https://doi.org/10.1007/s00256-010-0932-2