Document Detail

ECG-synchronized cardiac MR imaging: method and evaluation.
MedLine Citation:
PMID:  4001369     Owner:  NLM     Status:  MEDLINE    
An electrocardiographic (ECG) sensing and gating device compatible with a 0.35-tesla (T) magnetic resonance (MR) imager has been developed and used to produce 802 MR images of the heart in 30 patients. The instrument consists of an isolated acquisition module, an electrically floating preamplifier, and a monitor gating module. Two spin-echo images were acquired for each of five, 0.7-cm thick, transaxial sections from the base to the apex of the heart during each ECG-synchronized imaging run. Image quality was assessed in a blind study by two investigators, on a scale from 0 to 3, as diagnostic [2-3] or nondiagnostic [0-1]. There was agreement in 91.4% of their assessments of diagnostic images (68.1% of the images studied). Resolution of heart anatomy on the MR images was adversely affected by prolonged spin-echo time delay, imaging in late diastole, image acquisition at the cardiac apex, irregular triggering, and artifacts. The synchronization of gradient pulses to the ECG at 0.35 T appears safe for patients, permits diagnostic resolution of images, allows image acquisition at distinct points during the cardiac cycle, and enables monitoring of patients during imaging.
P Lanzer; C Barta; E H Botvinick; H U Wiesendanger; G Modin; C B Higgins
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Radiology     Volume:  155     ISSN:  0033-8419     ISO Abbreviation:  Radiology     Publication Date:  1985 Jun 
Date Detail:
Created Date:  1985-07-05     Completed Date:  1985-07-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401260     Medline TA:  Radiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  681-6     Citation Subset:  AIM; IM    
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MeSH Terms
Heart* / physiopathology
Magnetic Resonance Spectroscopy / diagnostic use*
Middle Aged

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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