Application of adaptive non-linear 2D and 3D postprocessing filters for reduced dose abdominal CT

Borgen, Lars; Kalra, Mannudeep K.; Lærum, Frode; Hachette, Isabelle W; Fredriksson, Carina H; Sandborg, Michael; Smedby, Örjan

doi:10.1258/ar.2011.110563

Cited by 13 publications

(6 citation statements)

References 22 publications

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“…Images at each dose level (30, 70 and 100%) were reconstructed with FBP and ADMIRE strengths 3 and 5. Pairwise visual grading was carried out independently by five radiologists with varying experience (6–20 years), using four modified criteria (C1–C4) from the European guidelines for image quality in abdominal CT [ 19 ] together with image noise (C5) and overall image quality (C6) [ 20 ] to suit the purpose of this study. The criteria used were as follows: C1.…”

Section: Methodsmentioning

confidence: 99%

Assessment of image quality in abdominal CT: potential dose reduction with model-based iterative reconstruction

et al. 2018

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PurposeTo estimate potential dose reduction in abdominal CT by visually comparing images reconstructed with filtered back projection (FBP) and strengths of 3 and 5 of a specific MBIR.Material and methodsA dual-source scanner was used to obtain three data sets each for 50 recruited patients with 30, 70 and 100% tube loads (mean CTDIvol 1.9, 3.4 and 6.2 mGy). Six image criteria were assessed independently by five radiologists. Potential dose reduction was estimated with Visual Grading Regression (VGR).ResultsComparing 30 and 70% tube load, improved image quality was observed as a significant strong effect of log tube load and reconstruction method with potential dose reduction relative to FBP of 22–47% for MBIR strength 3 (p < 0.001). For MBIR strength 5 no dose reduction was possible for image criteria 1 (liver parenchyma), but dose reduction between 34 and 74% was achieved for other criteria. Interobserver reliability showed agreement of 71–76% (κw 0.201–0.286) and intra-observer reliability of 82–96% (κw 0.525–0.783).ConclusionMBIR showed improved image quality compared to FBP with positive correlation between MBIR strength and increasing potential dose reduction for all but one image criterion.Key Points• MBIR’s main advantage is its de-noising properties, which facilitates dose reduction.• MBIR allows for potential dose reduction in relation to FBP.• Visual Grading Regression (VGR) produces direct numerical estimates of potential dose reduction.• MBIR strengths 3 and 5 dose reductions were 22–34 and 34–74%.• MBIR strength 5 demonstrates inferior performance for liver parenchyma.

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Section: Methodsmentioning

confidence: 99%

Assessment of image quality in abdominal CT: potential dose reduction with model-based iterative reconstruction

et al. 2018

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“…Some vendor-neutral techniques include nonlinear imaging denoising algorithms that operate on a thirdparty offline server to eliminate noise from DICOM CT images (e.g., SafeCT, MedicVision Imaging Solutions; and Clarity, Sapheneia). These techniques have evolved and currently show considerable image noise reduction potential [33]. However, oversmoothing of images, loss in sharpness, and blurred lesion margins are reported when substantial radiation dose reduction is intended [34].…”

Section: Iterative Reconstruction Techniques In Abdominopelvic Ctmentioning

confidence: 99%

Iterative Reconstruction Techniques in Abdominopelvic CT: Technical Concepts and Clinical Implementation

Patiño

Fuentes

Singh

et al. 2015

American Journal of Roentgenology

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The widespread use of CT has raised concerns about potential radiation risks, motivating diverse strategies to reduce the radiation dose associated with CT. CT manufacturers have developed alternative reconstruction algorithms intended to improve image quality on dose-optimized CT studies, mainly through noise and artifact reduction. Iterative reconstruction techniques take unique approaches to noise reduction and provide distinct strength levels or settings.

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“…Researchers have reported major reductions in routine effective doses from CT compared with NCRP reference levels. Results in children have been particularly gratifying (13)(14)(15).…”

Section: Editorial: Radiation Exposure In Ct Scanning and Risk Thrallmentioning

confidence: 99%

Radiation Exposure in CT Scanning and Risk: Where Are We?

Thrall

2012

Radiology

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Application of adaptive non-linear 2D and 3D postprocessing filters for reduced dose abdominal CT

Abstract: Background: Abdominal computed tomography (CT) is a frequently performed imaging

Cited by 13 publications

References 22 publications

Assessment of image quality in abdominal CT: potential dose reduction with model-based iterative reconstruction

Assessment of image quality in abdominal CT: potential dose reduction with model-based iterative reconstruction

Iterative Reconstruction Techniques in Abdominopelvic CT: Technical Concepts and Clinical Implementation

Radiation Exposure in CT Scanning and Risk: Where Are We?

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