| Right coronary MR angiography at 7 T: a direct quantitative and qualitative comparison with 3 T in young healthy volunteers. | |
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MedLine Citation:
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PMID: 20851943 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To objectively compare quantitative parameters related to image quality attained at coronary magnetic resonance (MR) angiography of the right coronary artery (RCA) performed at 7 T and 3 T. MATERIALS AND METHODS: Institutional review board approval was obtained, and volunteers provided signed informed consent. Ten healthy adult volunteers (mean age ± standard deviation, 25 years ± 4; seven men, three women) underwent navigator-gated three-dimensional MR angiography of the RCA at 7 T and 3 T. For 7 T, a custom-built quadrature radiofrequency transmit-receive surface coil was used. At 3 T, a commercial body radiofrequency transmit coil and a cardiac coil array for signal reception were used. Segmented k-space gradient-echo imaging with spectrally selective adiabatic fat suppression was performed, and imaging parameters were similar at both field strengths. Contrast-to-noise ratio between blood and epicardial fat; signal-to-noise ratio of the blood pool; RCA vessel sharpness, diameter, and length; and navigator efficiency were quantified at both field strengths and compared by using a Mann-Whitney U test. RESULTS: The contrast-to-noise ratio between blood and epicardial fat was significantly improved at 7 T when compared with that at 3 T (87 ± 34 versus 52 ± 13; P = .01). Signal-to-noise ratio of the blood pool was increased at 7 T (109 ± 47 versus 67 ± 19; P = .02). Vessel sharpness obtained at 7 T was also higher (58% ± 9 versus 50% ± 5; P = .04). At the same time, RCA vessel diameter and length and navigator efficiency showed no significant field strength-dependent difference. CONCLUSION: In our quantitative and qualitative study comparing in vivo human imaging of the RCA at 7 T and 3 T in young healthy volunteers, parameters related to image quality attained at 7 T equal or surpass those from 3 T. |
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Authors:
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Saskia G C van Elderen; Maarten J Versluis; Jos J M Westenberg; Harsh Agarwal; Nadine B Smith; Matthias Stuber; Albert de Roos; Andrew G Webb |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Radiology Volume: 257 ISSN: 1527-1315 ISO Abbreviation: Radiology Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-20 Completed Date: 2010-10-29 Revised Date: 2012-05-07 |
Medline Journal Info:
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Nlm Unique ID: 0401260 Medline TA: Radiology Country: United States |
Other Details:
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Languages: eng Pagination: 254-9 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, Leiden University Medical Center, Albinusdreef 2, Leiden, the Netherlands. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Coronary Vessels / anatomy & histology* Electrocardiography Equipment Design Female Humans Image Processing, Computer-Assisted Magnetic Resonance Angiography / instrumentation, methods* Male Statistics, Nonparametric |
| Comments/Corrections | |
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