Performance of single-energy metal artifact reduction in cardiac computed tomography: A clinical and phantom study

Autor: Shirley F. Rollison, Marcus Y. Chen, John L. Schuzer, Tushar Acharya, Arlene Sirajuddin, Chloe Steveson, Sujata M Shanbhag, Kathie Bronson, Daniel W. Groves, Evan A. Nelson, Bharath Sathya
Rok vydání: 2019
Předmět:
Adult
Male
Scanner
Pacemaker
Artificial
Image quality
Computed Tomography Angiography
030204 cardiovascular system & hematology
Coronary Angiography
Prosthesis Design
Imaging phantom
030218 nuclear medicine & medical imaging
03 medical and health sciences
Metal Artifact
0302 clinical medicine
Predictive Value of Tests
Medicine
Humans
Radiology
Nuclear Medicine and imaging
Aged
Retrospective Studies
Artifact (error)
business.industry
Phantoms
Imaging
Attenuation
Reproducibility of Results
Reconstruction algorithm
Middle Aged
equipment and supplies
Defibrillators
Implantable
Cross-Sectional Studies
Metals
Heart Valve Prosthesis
Beam Hardening Artifact
Radiographic Image Interpretation
Computer-Assisted
Female
Cardiology and Cardiovascular Medicine
business
Nuclear medicine
Artifacts
Algorithms
Zdroj: Journal of cardiovascular computed tomography. 14(6)
ISSN: 1876-861X
Popis: To investigate the performance of a reconstruction algorithm, single-energy metal artifact reduction (SEMAR), against standard reconstruction in cardiac computed tomography (CT) studies of patients with implanted metal and in a defibrillator lead phantom.From a retrospective, cross-sectional clinical study with institutional review board approval of 118 patients with implanted metal, 122 cardiac CT studies from November 2009 to August 2016 performed on a 320-detector row scanner with standard and SEMAR reconstructions were included. The maximum beam hardening artifact radius, artifact attenuation variation surrounding the implanted metal, and image quality on a 4-point scale (1-no/minimal artifact to 4-severe artifact) were assessed for each reconstruction. A defibrillator lead phantom study was performed at different tube potentials and currents with both reconstruction methods. Maximum beam hardening artifact radius and average artifact attenuation variation were measured.In the clinical study, SEMAR markedly reduced the maximum beam hardening artifact radius by 77% (standard: 14.8 mm [IQR 9.7-22.2] vs. SEMAR: 3.4 mm [IQR 2.2-7.1], p 0.0001) and artifact attenuation variation by 51% (standard: 130.0 HU [IQR 75.9-184.4] vs. SEMAR: 64.3 HU [IQR 48.2-89.2], p 0.0001). Image quality improved with SEMAR (standard: 3 [IQR 2-3.5] vs. SEMAR: 2 [IQR 1-2.5], p 0.0001). The defibrillator lead phantom study confirmed these results across varying tube potentials and currents.SEMAR reconstruction achieved superior image quality and markedly reduced maximum beam hardening artifact radius and artifact attenuation variation compared to standard reconstruction in 122 clinical cardiac CT studies of patients with implanted metal and in a defibrillator lead phantom study.
Databáze: OpenAIRE
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