Technical Note: Measuring contrast‐ and noise‐dependent spatial resolution of an iterative reconstruction method in CT using ensemble averaging

Purpose: The spatial resolution of iterative reconstruction (IR) in computed tomography (CT) is contrast‐ and noise‐dependent because of the nonlinear regularization. Due to the severe noise contamination, it is challenging to perform precise spatial‐resolution measurements at very low‐contrast leve...

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Veröffentlicht in:	Medical physics (Lancaster) 2015-05, Vol.42 (5), p.2261-2267
Hauptverfasser:	Yu, Lifeng, Vrieze, Thomas J., Leng, Shuai, Fletcher, Joel G., McCollough, Cynthia H.
Format:	Artikel
Sprache:	eng
Schlagworte:	60 APPLIED LIFE SCIENCES Biological material, e.g. blood, urine Haemocytometers CAT SCANNING Computed tomography computed tomography (CT) Computerised tomographs computerised tomography Digital computing or data processing equipment or methods, specially adapted for specific applications FILTERS Image data processing or generation, in general IMAGE PROCESSING image quality image reconstruction image resolution INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ITERATIVE METHODS iterative reconstruction (IR) Medical image contrast Medical image noise medical image processing Medical image reconstruction Medical image spatial resolution Modulation transfer functions NOISE PHANTOMS Phantoms, Imaging Radiation Dosage RADIATION DOSES Radiation Imaging Physics SPATIAL RESOLUTION Tomography, X-Ray Computed - instrumentation Tomography, X-Ray Computed - methods
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