We consider signal processing methods for phased-array magnetic resonance imaging (MRI). A theoretical description of a phasedarray MRI data model is presented and three image reconstruction algorithms are proposed to estimate the effective image pixels. An analysis is provided to show how the new algorithms compare to conventional reconstruction methods.

• Geometric Distortion • Spatial Resolution • Slice thickness and position • Interslice Gap • Estimate of Image Bandwidth • Low Contrast Detectability • Image Uniformity • Signal-to-Noise Ratio (SNR) • Physical and Electronic Slice Offset • Landmark This document contains phantom specifications and materials and a brief description of image analysis. For a more complete description of the ACR M...

Medical imaging is a vital component of a large number of applications. MRI is the state-of the-art medical imaging technology, which allows cross sectional view of the body with unprecedented tissue contrast. The information that MRI provides has greatly increased knowledge of normal and diseased anatomy for medical research, and is a critical component in diagnosis and treatment planning. In ...

This thesis presents a novel set of image analysis tools developed for the purpose of assisting radiologists with the task of detecting and characterizing breast lesions in image data acquired using magnetic resonance imaging (MRI). MRI is increasingly being used in the clinical setting as an adjunct to x-ray mammography (which is, itself, the basis of breast cancer screening programs worldwide...

MRI data analysis is routinely done on the magnitude part of complex images. While both real and imaginary image channels contain Gaussian noise, magnitude MRI data are characterized by Rice distribution. However, conventional filtering methods often assume image noise to be zero mean and Gaussian distributed. Estimation of an underlying image using magnitude data produces biased result. The bi...

By employing the triple coincidence between the γ trajectory intersections from β decaying isotopes emitting a third, prompt, photon ( γ-PET technique), sub-millimeter spatial resolution can be reached in 3 dimensions for the localization of a point source with a reduced requirement of reconstructed intersections per voxel compared to a conventional PET reconstruction analysis. Results of a Mon...

This paper presents a new method for poor lighting contrast enhancement of MRI images based on the Weber‟s law. Background of MRI images is identified by using the contrast enhancement transformations. The contrast image transformation can be defined by two operators: opening and closing. The first operator employs information from block analysis, while the second transformation utilizes the op...

Different generations of Gd(III)DTPA-terminated poly(propylene imine) dendrimers {G1 [n = 4 Gd(III) ions per molecule], G3 (n = 16) and G5 (n = 64)} and reference Gd(III)DTPA complex [G0 (n = 1)] were characterized in terms of (i) longitudinal (r1) and transverse (r2) relaxivities in mouse blood plasma, (ii) concentration detection limits in vitro and (iii) in vivo contrast-enhanced MR imaging ...