The use of contrast -- detail -- dose evaluation of image quality in a computed tomographic scanner.
Limiting-perception measurements of hole patterns in computed tomography reconstructions of a low-contrast phantom are used to generate contrast -- detail -- dose diagrams for various contrasts, hole diameters, dose, and system modulation transfer functions (MTF). These curves are then divided into MTF-dominated, transition, and noise-dominated regions. The low-contrast perceptibility and image noise are parameterized and compared. A limiting-perception factor is difined and is shown to be nearly independent of contrast, hole diameter, dose, and MTF in the noise-dominated region.
D003626:Data Display; D004582:Electronics, Medical; D008961:Models, Structural; D008962:Models, Theoretical; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*