Download MR Imaging and Spectroscopy of Central Nervous System by Rakesh K. Gupta, Robert B. Lufkin PDF

By Rakesh K. Gupta, Robert B. Lufkin

This ebook covers concerns concerning imaging good points of assorted CNS infections and defines using more recent options comparable to magnetization move imaging, spectroscopy, and diffusion-weighted imaging in a variety of infections.

Show description

Read or Download MR Imaging and Spectroscopy of Central Nervous System Infection PDF

Best diagnostic imaging books

Encyclopedia of Diagnostic Imaging

The purpose of this finished encyclopedia is to supply unique info on diagnostic radiology contributing to the large box of imaging. the wide variety of entries are written by means of major specialists. they are going to supply easy and medical scientists in academia, perform and with invaluable information regarding the sphere of diagnostic imaging.

Sectional Anatomy: PET CT and SPECT CT

This well timed atlas info developments in PET/CT and SPECT/CT. each one bankruptcy presents nuclear medication practitioners, radiologists, oncologists, and citizens with specific info on general anatomy of FDG PET/CT, diversifications and artifacts of FDG PET/CT, common anatomy of non-FDG PET/CT, and basic anatomy of PET/CT and SPECT/CT.

Coloscopie Virtuelle

Los angeles coloscopie virtuelle a considérablement bouleversé l’approche du dépistage et du diagnostic du melanoma colorectal et des polypes. los angeles reconstruction 3D des organes permet en effet de les explorer virtuellement, épargnant au sufferer le traumatisme de l. a. coloscopie endoscopique. Elle a désormais une position importante aux côtés de l. a. coloscopie endoscopique et peut, dans un nombre de cas croissants, réaliser une replacement fiable.

Computed Tomography: Principles, Design, Artifacts, and Recent Advances, Second Edition

X-ray computed tomography (CT) maintains to adventure speedy development, either in uncomplicated know-how and new medical purposes. Seven years after its first version, Computed Tomography: rules, layout, Artifacts, and up to date developments, moment version, presents an summary of the evolution of CT, the mathematical and actual elements of the expertise, and the basics of picture reconstruction algorithms.

Extra info for MR Imaging and Spectroscopy of Central Nervous System Infection

Sample text

Sinha et al. , the free induction decay) that lasts for a long time. , in the MR image), this manifests itself as a sharp spectral line, and represents the bulk of the signal detected by a typical MR scanner. In contrast, the other “pool” consists of protons that are “bound” to large macromolecules such as proteins and membrane and results in heavily restricted motion of these protons. The restricted motion in turn enhances the static or slowly varying (low frequency) components of the magnetic field fluctuations, which are the time-dependent perturbations responsible for T2-relaxation.

The mean square distance, , that a molecule travels in unit time-t is given in three dimensions by the famous Einstein equation, for unrestricted isotropic diffusion: = 6Dt (3) where D is the diffusion constant (mm2/s). In a homogenous medium of infinite dimension, the direction of the diffusion path is totally random and the diffusion coefficient, a measure of the molecule’s mobility, depends sensitively on the temperature of the medium and inversely on the viscosity. In tissues, this motion is severely restricted by the presence of cellular structures that pose as barriers to unrestricted motion.

Courtesy Drs. ) column shows the images of the two slices acquired at b = 1000 s/mm2. Several points are to be noted. One can immediately observe the bright zone compromised by a cerebral stroke in the left image. A hyperintense zone indicates a region where the protons are diffusing less than in the zones with lower intensity. A smaller value of diffusion coefficient (as in the stroke region) causes lesser dephasing of the spins and consequently more MR signal than that arising from normal tissue zones where the protons are able to diffuse to a greater extent.

Download PDF sample

Rated 4.33 of 5 – based on 20 votes