𝔖 Bobbio Scriptorium
✦   LIBER   ✦

An accurate simulator for magnetic resonance coil sensitivity estimation

✍ Scribed by Giulio Giovannetti; Vittorio Viti; Yongjun Liu; Wenhua Yu; Raj Mittra; Luigi Landini; Antonio Benassi

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
225 KB
Volume
33B
Category
Article
ISSN
1552-5031

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Coil sensitivity estimation in magnetic resonance experiments requires the knowledge of biological sample‐induced resistance. In dependence on system geometry, many authors studied sample–coil interaction by using a very simple coil geometry (circular, square, etc.) and homogeneous infinitely long cylinders, spheres, or half‐spaces as approximations of the sample geometry. However, in real MR experiments, both shape and dimensions can be very different with respect to these coil and sample models. In this article, we propose the application of finite‐difference time‐domain method for sample‐induced resistance estimation. The developed approach can be used as a tool to estimate sample‐induced resistance in complex receiving systems, without approximations in sample and coil geometries. Calculation of both sample‐induced resistance and magnetic field pattern permits to estimate coil sensitivity for optimal coil design in dependence on the sample size and geometry. Comparison with experimental data, performed on two home‐built saddle coils, demonstrated the great accuracy of the developed method. © 2008 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 33B: 209–215, 2008

📜 SIMILAR VOLUMES

An optimized solenoidal head radiofreque
An optimized solenoidal head radiofrequency coil for low-field magnetic resonance imaging
✍ Barbara Blasiak; Vyacheslav Volotovskyy; Charlie Deng; Boguslaw Tomanek 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 265 KB

Applications of low-field magnetic resonance imaging (MRI) systems (<0.3 T) are limited due to the signal-to-noise ratio (SNR) being lower than that provided by systems based on superconductive magnets (> or = 1.5 T). Therefore, the design of radiofrequency (RF) coils for low-field MRI requires care

Parameter estimation for in vivo magneti
Parameter estimation for in vivo magnetic resonance spectroscopy (mrs) using simulated annealing
✍ K. Sekihara; N. Ohyama 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 376 KB 👁 1 views

## Abstract A method for estimating the spectral parameters from a noisy FID is proposed. The method uses a priori information concerning the lower and upper limits between which such parameters' values can exist. Computer simulation results show that, using the proposed method, values of the spect

An inductively-coupled, detachable recei
An inductively-coupled, detachable receiver coil system for use with magnetic resonance compatible endoscopes
✍ David J. Gilderdale; Andreanna D. Williams; Umakant Dave; Nandita M. deSouza 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 450 KB

## Abstract ## Purpose To construct an inductively‐coupled receiver coil system for use with a magnetic resonance (MR) compatible endoscope, and to evaluate its use in a pilot group of patients with esophageal cancer. ## Materials and Methods An inductively‐coupled coil system, comprising a sadd

An optimized method for estimating intra
An optimized method for estimating intracranial volume from magnetic resonance images
✍ Jackie Eritaia; Stephen J. Wood; Geoffrey W. Stuart; Nicola Bridle; Paul Dudgeon 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 269 KB 👁 1 views

The accuracy and efficiency of protocols to measure intracranial volume (ICV) from volumetric magnetic resonance imaging (MRI) studies has not been formally analyzed. The ICV of 30 control participants was obtained by tracing every slice of a MRI data set on which the cranial cavity appeared, and co

A solid reusable endorectal receiver coi
A solid reusable endorectal receiver coil for magnetic resonance imaging of the prostate: Design, use, and comparison with an inflatable endorectal coil
✍ Nandita M. Desouza; David J. Gilderdale; Rakesh Puni; Glyn A. Coutts; Ian R. You 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 469 KB 👁 1 views

## Abstract We have designed a solid endorectal receiver coil for MRI of the prostate. The coil provided an improved signal‐to‐noise ratio up to 5 cm from its surface when compared with a standard pelvic phased array. This preliminary report describes 16 patients who were imaged using this coil, se