| Dynamic MR digital subtraction angiography using contrast enhancement, fast data acquisition, and complex subtraction. | |
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MedLine Citation:
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PMID: 8892206 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A dynamic MR angiography technique, MR digital subtraction angiography (MR DSA), is proposed using fast acquisition, contrast enhancement, and complex subtraction. When a bolus of contrast is injected into a patient, data acquisition begins, dynamically acquiring a thick slab using a fast gradient echo sequence for 10-100 s. Similar to x-ray DSA, a mask is selected from the images without contrast enhancement, and later images are subtracted from the mask to generate angiograms. Complex subtraction is used to overcome the partial volume effects related to the phase difference between the flowing and stationary magnetization in a voxel. Vessel signal is the enhancement of flow magnetization resulting from the contrast bolus. MR DSA was performed in 28 patients, including vessels in the lungs, brains, legs, abdomen, and pelvis. All targeted vessels were well depicted with MR DSA. Corresponding dynamic information (contrast arrival time ta and duration of the arterial phase tav) was measured: ta/tav = 3.4/4.7 s for the lung, 10.3/4.9 s for the brain, 12.8/19.3 for the aorta, 15.2/12.6 s for the leg. MR DSA can provide dynamic angiographic images using a very short acquisition time. |
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Authors:
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Y Wang; D L Johnston; J F Breen; J Huston; C R Jack; P R Julsrud; M J Kiely; B F King; S L Riederer; R L Ehman |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 36 ISSN: 0740-3194 ISO Abbreviation: Magn Reson Med Publication Date: 1996 Oct |
Date Detail:
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Created Date: 1997-02-05 Completed Date: 1997-02-05 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 551-6 Citation Subset: IM |
Affiliation:
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MRI Laboratory, Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Abdomen
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blood supply Adolescent Adult Aged Aged, 80 and over Angiography, Digital Subtraction Brain / blood supply Child Contrast Media Female Humans Image Enhancement* Leg / blood supply Lung / blood supply Magnetic Resonance Angiography* Male Middle Aged Pelvis / blood supply |
| Grant Support | |
ID/Acronym/Agency:
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CA51124/CA/NCI NIH HHS; HL37310/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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