TY - JOUR
T1 - Navigator-echo-based real-time respiratory gating and triggering for reduction of respiration effects in three-dimensional coronary MR angiography
AU - Wang, Yi
AU - Rossman, Phillip J.
AU - Grimm, Roger C.
AU - Riederer, Stephen J.
AU - Ehman, Richard L.
PY - 1996/1
Y1 - 1996/1
N2 - PURPOSE: To test the hypothesis that respiration effects in three- dimensional (3D) coronary magnetic resonance (MR) imaging can be reduced with navigator-echo-based gating or triggering according to the superior-inferior position of the diaphragm. MATERIALS AND METHODS: Real-time respiratory gating and respiratory triggering (breath hold with feedback) were implemented with navigator echoes in a magnetization-prepared, segmented, 3D coronary imaging sequence. The two techniques were first tested with a motion phantom. An imaging protocol that compared real-time respiratory-gated acquisition, real-time respiratory-triggered acquisition, and continuous acquisition was then evaluated in six healthy subjects. RESULTS: Real-time respiratory-gated and respiratory-triggered acquisition were superior to continuous acquisition with two signals averaged (P = .025). The performance of the gated acquisition was about the same as that of the triggered acquisition (P = .05). CONCLUSION: Navigator-echo-based, real-time respiratory-gating and respiratory-triggering techniques are practical methods for effective reduction of respiration effects in coronary MR imaging.
AB - PURPOSE: To test the hypothesis that respiration effects in three- dimensional (3D) coronary magnetic resonance (MR) imaging can be reduced with navigator-echo-based gating or triggering according to the superior-inferior position of the diaphragm. MATERIALS AND METHODS: Real-time respiratory gating and respiratory triggering (breath hold with feedback) were implemented with navigator echoes in a magnetization-prepared, segmented, 3D coronary imaging sequence. The two techniques were first tested with a motion phantom. An imaging protocol that compared real-time respiratory-gated acquisition, real-time respiratory-triggered acquisition, and continuous acquisition was then evaluated in six healthy subjects. RESULTS: Real-time respiratory-gated and respiratory-triggered acquisition were superior to continuous acquisition with two signals averaged (P = .025). The performance of the gated acquisition was about the same as that of the triggered acquisition (P = .05). CONCLUSION: Navigator-echo-based, real-time respiratory-gating and respiratory-triggering techniques are practical methods for effective reduction of respiration effects in coronary MR imaging.
KW - Coronary vessels, MR
KW - Magnetic resonance (MR), artifact
KW - Magnetic resonance (MR), motion correction
KW - Magnetic resonance (MR), vascular studies
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U2 - 10.1148/radiology.198.1.8539406
DO - 10.1148/radiology.198.1.8539406
M3 - Article
C2 - 8539406
AN - SCOPUS:0030026702
SN - 0033-8419
VL - 198
SP - 55
EP - 60
JO - Radiology
JF - Radiology
IS - 1
ER -