✦ LIBER ✦

Simultaneous magnetic resonance phase and magnitude temperature maps in muscle

✍ Scribed by Harvey E. Cline; Kullervo Hynynen; Erika Schneider; Christopher J. Hardy; Stefan E. Maier; Ronald D. Watkins; Ferenc A. Jolesz

Book ID: 102953656
Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 710 KB
Volume: 35
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.1910350307

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Noninvasive magnetic resonance temperature maps that are used to monitor thermal ablation of tissue are described. In magnetic resonance images, thermally induced proton nuclear magnetic resonance frequency shifts, and changes in the longitudinal relaxation time produce both phase and magnitude changes in the MR signal. Temperature maps with improved sensitivity are derived from the complex‐difference nuclear magnetic resonance signal. Bovine muscle specimens were heated with focused ultrasound to model thermal surgery and create a known thermal distribution to test the method. Resulting MR images acquired in 2 s produce temperature maps with 1 mm resolution and 2°C temperature sensitivity. The temperature sensitivity was increased by extending the acquisition to 5 s, by decreasing the receiver bandwidth, and increasing the echo time.

📜 SIMILAR VOLUMES

Temperature dependence of phase separati

Temperature dependence of phase separation and magnetic anisotropy by electron spin resonance in Pr0.6Ca0.4Mn0.9Ru0.1O3

✍ C. Autret-Lambert; M. Gervais; M. Zaghrioui; S. Roger; F. Gervais; N. Raimboux; 📂 Article 📅 2005 🏛 Springer 🌐 English ⚖ 768 KB

Muscle metabolism in patients with polym

Muscle metabolism in patients with polymyositis simultaneously evaluated by using 31P-magnetic resonance spectroscopy and near-infrared spectroscopy

✍ H. Okuma; D. Kurita; T. Ohnuki; M. Haida; Y. Shinohara 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 701 KB

Thigh muscle function in stroke patients

Thigh muscle function in stroke patients revealed by velocity-encoded cine phase-contrast magnetic resonance imaging

✍ Hongmei Wen; Zulin Dou; Taija Finni; Marko Havu; Zhuang Kang; Shumei Cheng; Sari 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 447 KB

## Abstract Current methods of clinical assessment of muscle coordination and function after stroke do not provide information on deep muscles. The objective of this study was to examine how stroke affects both superficial and deep muscles' coordination and whether muscle function improves after re

Magnetic phase diagrams and impurity res

Magnetic phase diagrams and impurity resonance scattering of CrFe and CrSi and their ternary alloys with V and Mn: III. Magnetic phase diagrams in the composition-temperature and the pressure-temperature planes

✍ Eric Fawcett; V.Yu. Galkin 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 787 KB

Direct noninvasive quantification of lac

Direct noninvasive quantification of lactate and high energy phosphates simultaneously in exercising human skeletal muscle by localized magnetic resonance spectroscopy

✍ Martin Meyerspeer; Graham J. Kemp; Vladimir Mlynárik; Martin Krššák; Julia Szend 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 369 KB

## Abstract A novel method based on interleaved localized ^31^P‐ and ^1^H MRS is presented, by which lactate accumulation and the accompanying changes in high energy phosphates in human skeletal muscle can be monitored simultaneously during exercise and recovery. Lactate is quantified using a local

Coronary flow and coronary flow reserve

Coronary flow and coronary flow reserve measurements in humans with breath-held magnetic resonance phase contrast velocity mapping

✍ Clarence P. Davis; Pei-Fang Liu; Markus Hauser; Susanne C. Göhde; Gustav K. Von 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 873 KB

## Abstract Objective evidence for coronary lesion significance can be obtained with ischemic stress testing. Since flow‐limiting stenoses have already undergone compensatory vasodilatation to maintain flow, the response to vasoactive stimulation is dampened. The degree of response limitation is re