TY - JOUR
T1 - Coronary MR Imaging Using Free-Breathing 3D Steady-State Free Precession with Radial k-space Sampling
AU - Spuentrup, Elmar
AU - Katoh, M.
AU - Stuber, M.
AU - Botnar, R.
AU - Schaeffter, T.
AU - Buecker, A.
AU - Günther, R. W.
PY - 2003/10/1
Y1 - 2003/10/1
N2 - Purpose: To investigate the potential of free-breathing 3D steady-state free precession (SSFP) imaging with radial k-space sampling for coronary MR-angiography (MRA), coronary projection MR-angiography and coronary vessel wall imaging. Materials and Methods: A navigator-gated free-breathing T2-prepared 3D SSFP sequence (TR = 6.1 ms, TE = 3.0 ms, flip angle = 120°, field-of-view = 360 mm2) with radial k-space sampling (384 radials) was implemented for coronary MRA. For projection coronary MRA, this sequence was combined with a 2D selective aortic spin tagging pulse. Coronary vessel wall imaging was performed using a high-resolution inversion-recovery black-blood 3D radial SSFP sequence (384 radials, TR = 5.3 ms, TE = 2.7 ms, flip angle = 55°, reconstructed resolution 0.35 × 0.35 × 1.2 mm3) and a local re-inversion pulse. Six healthy volunteers (two for each sequence) were investigated. Motion artifact level was assessed by two radiologists. Results: In coronary MRA, the coronary lumen was displayed with a high signal and high contrast to the surrounding lumen. Projection coronary MRA demonstrated selective visualization of the coronary lumen while surrounding tissue was almost completely suppressed. In coronary vessel wall imaging, the vessel wall was displayed with a high signal when compared to the blood pool and the surrounding tissue. No visible motion artifacts were seen. Conclusion: 3D radial SSFP imaging enables coronary MRA, coronary projection MRA and coronary vessel wall imaging with a low motion artifact level.
AB - Purpose: To investigate the potential of free-breathing 3D steady-state free precession (SSFP) imaging with radial k-space sampling for coronary MR-angiography (MRA), coronary projection MR-angiography and coronary vessel wall imaging. Materials and Methods: A navigator-gated free-breathing T2-prepared 3D SSFP sequence (TR = 6.1 ms, TE = 3.0 ms, flip angle = 120°, field-of-view = 360 mm2) with radial k-space sampling (384 radials) was implemented for coronary MRA. For projection coronary MRA, this sequence was combined with a 2D selective aortic spin tagging pulse. Coronary vessel wall imaging was performed using a high-resolution inversion-recovery black-blood 3D radial SSFP sequence (384 radials, TR = 5.3 ms, TE = 2.7 ms, flip angle = 55°, reconstructed resolution 0.35 × 0.35 × 1.2 mm3) and a local re-inversion pulse. Six healthy volunteers (two for each sequence) were investigated. Motion artifact level was assessed by two radiologists. Results: In coronary MRA, the coronary lumen was displayed with a high signal and high contrast to the surrounding lumen. Projection coronary MRA demonstrated selective visualization of the coronary lumen while surrounding tissue was almost completely suppressed. In coronary vessel wall imaging, the vessel wall was displayed with a high signal when compared to the blood pool and the surrounding tissue. No visible motion artifacts were seen. Conclusion: 3D radial SSFP imaging enables coronary MRA, coronary projection MRA and coronary vessel wall imaging with a low motion artifact level.
KW - Contrast
KW - Coronary artery disease
KW - Coronary vessel
KW - Magnetic resonance imaging
KW - Motion artifacts
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U2 - 10.1055/s-2003-42895
DO - 10.1055/s-2003-42895
M3 - Article
C2 - 14556100
AN - SCOPUS:0242363327
SN - 1438-9029
VL - 175
SP - 1330
EP - 1334
JO - RoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren
JF - RoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren
IS - 10
ER -