Dose reduction with iterative reconstruction: Optimization of CT protocols in clinical practice

Diagnostic and Interventional Imaging
J GreffierJ P Beregi

Abstract

To create an adaptable and global approach for optimizing MDCT protocols by evaluating the influence of acquisition parameters and Iterative Reconstruction (IR) on dose reduction and image quality. MDCT acquisitions were performed on quality image phantom by varying kVp, mAs, and pitch for the same collimation. The raw data were reconstructed by FBP and Sinogram Affirmed Iterative Reconstruction (SAFIRE) with different reconstruction kernel and thickness. A total of 4032 combinations of parameters were obtained. Indices of quality image (image noise, NCT, CNR, SNR, NPS and MTF) were analyzed. We developed a software in order to facilitate the optimization between dose reduction and image quality. Its outcomes were verified on an adult anthropomorphic phantom. Dose reduction resulted in the increase of image noise and the decrease of SNR and CNR. The use of IR improved these indices for the same dose without affecting NCT and MTF. The image validation was performed by the anthropomorphic phantom. The software proposed combinations of parameters to reduce doses while keeping indices of the image quality adequate. We observed a CTDIvol reduction between -44% and -83% as compared to the French diagnostic reference levels (DRL) for ...Continue Reading

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Citations

Nov 3, 2015·Diagnostic and Interventional Imaging·A GervaiseM Lapierre-Combes
Apr 9, 2016·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Joël GreffierAhmed Larbi
May 13, 2015·Diagnostic and Interventional Imaging·A BlumP Teixeira
May 3, 2016·Diagnostic and Interventional Imaging·P GachG Gorincour
May 15, 2016·Diagnostic and Interventional Imaging·C Çınar, A Türkvatan
May 24, 2016·Orthopaedics & Traumatology, Surgery & Research : OTSR·M LefereA Larbi
Jul 17, 2016·Diagnostic and Interventional Imaging·M KayanA Recep Aktaş
Jul 28, 2016·Diagnostic and Interventional Imaging·F MacriJ P Beregi
Jul 28, 2016·Diagnostic and Interventional Imaging·A BlumP Gondim-Teixeira
Jul 28, 2016·Diagnostic and Interventional Imaging·A BlumD Molé
Aug 9, 2017·Journal of Computer Assisted Tomography·Khalid W ShaqdanDushyant V Sahani
Feb 22, 2017·Digestive Diseases and Sciences·R Brooke Jeffrey
Mar 15, 2021·Diagnostic and Interventional Imaging·Basien NicolanJulien Frandon
Jan 15, 2020·Diagnostic and Interventional Imaging·J GreffierS Si-Mohamed
May 25, 2020·Seminars in Ultrasound, CT, and MR·Satheesh KrishnaAshish Khandelwal
Oct 27, 2017·Diagnostic and Interventional Imaging·S Si-MohamedF Macri

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