Advanced Modeled Iterative Reconstruction in Low-Tube-Voltage Contrast-Enhanced Neck CT: Evaluation of Objective and
J-E Scholtz1, M Kaup2, K Hüsers2
1From the Department of Diagnostic and Interventional Radiology (J.-E.S., M.K., K.H., M.H.A., B.B., S.C.M., J.M.K., R.W.B., T.L., T.J.V., J.L.W.), University Hospital Frankfurt, Frankfurt, Germany janerikscholtz@gmail.com.
AJNR. American Journal of Neuroradiology
|October 3, 2015
Summary
Advanced modeled iterative reconstruction (ADMIRE) significantly reduces image noise in low-tube-voltage neck CT scans. ADMIRE strength levels 3 and 5 offer the best subjective image quality for enhanced diagnostic accuracy.
Area of Science:
- Radiology
- Medical Imaging
- Computed Tomography
Background:
- Dose-saving techniques in neck CT increase image noise.
- Iterative reconstruction methods can counteract noise.
- Advanced modeled iterative reconstruction (ADMIRE) is a noise-reduction technique.
Purpose of the Study:
- To evaluate the image quality of ADMIRE.
- To assess ADMIRE in contrast-enhanced, low-tube-voltage neck CT.
- To compare ADMIRE with filtered back-projection (FBP).
Main Methods:
- Sixty-one patients underwent 90-kVp neck CT.
- Image series were reconstructed using FBP and ADMIRE levels 1, 3, and 5.
- Objective image quality (noise, SNR, CNR) and subjective image quality were assessed.
Main Results:
- ADMIRE significantly reduced image noise compared to FBP, with lowest noise at ADMIRE 5.
- ADMIRE improved signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNR).
- Subjective image quality and contrast were better with ADMIRE 3 and 5 than FBP or ADMIRE 1.
Conclusions:
- Contrast-enhanced 90-kVp neck CT is feasible.
- ADMIRE 5 demonstrates superior objective image quality over FBP.
- ADMIRE 3 and 5 provide the best subjective image quality for neck CT.
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