Positron emission tomography is a medical imaging modality for producing 3D images of the
spatial distribution of biochemical tracers within the human body. The images are …

Quantitative measures of image quality and reliability are critical for both qualitative
interpretation and quantitative analysis of medical images. While, in theory, it is possible to …

Attenuation is believed to be one of the major causes of false-positive cardiac single-photon
emission computed tomographic perfusion images. This article provides an introduction to …

Purpose: Nonstationarity is an important aspect of imaging performance in CT and cone‐
beam CT (CBCT), especially for systems employing iterative reconstruction. This work …

Noise properties of emission tomographic reconstructed images are compared using
maximum-likelihood-expectation-maximization (ML-EM) and filtered-backprojection (FBP) …

We examined the application of an iterative penalized maximum likelihood (PML)
reconstruction method for improved detectability of microcalcifications (MCs) in digital breast …

The filtered backprojection (FBP) algorithm and statistical model based iterative algorithms
such as the maximum likelihood (ML) reconstruction or the maximum a posteriori (MAP) …

A novel SPECT collimation method, termed the synthetic collimator, is proposed. The
synthetic collimator employs a multiple-pinhole aperture and a high-resolution detector. The …

The low signal-to-noise ratio (SNR) in emission data has stimulated the development of
statistical image reconstruction methods based on the maximum a posteriori (MAP) …

The expectation maximisation (EM) algorithm is an iterative maximum likelihood procedure
often used for estimating the parameters of a mixture model. Theoretically, increases in the …