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Noncontrast MR angiography for supraaortic arteries using inflow enhanced inversion recovery fast spin echo imaging
Author(s) -
Takei Naoyuki,
Miyoshi Mitsuharu,
Kabasawa Hiroyuki
Publication year - 2012
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.23515
Subject(s) - inflow , medicine , magnetic resonance imaging , subtraction , magnetic resonance angiography , angiography , occlusion , digital subtraction angiography , artery , radiology , geology , cardiology , mathematics , oceanography , arithmetic
Abstract Purpose: To depict supraaortic arteries using (3D fast spin echo (FSE) combined with slab selective inversion recovery for noncontrast magnetic resonance angiography (MRA) in healthy volunteers, and to investigate the property of the inflow enhanced inversion recovery FSE (IFIR‐FSE) for background suppression and inflow effects. Materials and Methods: IFIR‐FSE with no image subtraction was used to visualize the aortic arch, subclavian arteries, carotid arteries, and vertebral arteries in 10 healthy volunteers. Simulations were performed to achieve both high background suppression and inflow effects by adjusting the inversion time (TI) and wait time after data acquisition. The effect of inflow was investigated with TIs of 800, 1200, 1600, and 2000 msec. Contrast between artery and these background tissues were measured with scan protocols based on simulation results. Results: IFIR‐FSE images showed good visualization of the supraaortic arteries and allowed separation of arteries from veins without image subtraction. The proposed method demonstrated that a high contrast between arteries and background tissues can be acquired with various TIs, which was in good agreement with the simulation. A TI over 1600 msec was favorable in terms of background suppression, arterial signal intensity, and inflow effects. Conclusion: Inflow enhanced inversion recovery cardiac‐triggered 3D FSE imaging can be used for supraaortic artery imaging without contrast agents. J. Magn. Reson. Imaging 2012;35:957–962. © 2011 Wiley Periodicals, Inc.