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Multi-phase coronary magnetic resonance angiography using a 3D cones trajectory

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3D whole-heart free-breathing coronary MRA simplifies prescription effort, requires less patient cooperation, and supports retrospective reformats at arbitrary planes... To reduce the scan time and improve the motion robustness for 3D whole-heart free-breathing coronary MRA by using the 3D cones readout trajectory (Fig. 1) combined with 2D spiral navigators and resolving multiple cardiac phases... The acquisition scheduling scheme supported sliding window reconstruction of multiple intermediate cardiac phases... Fig. 3 shows an axial slice containing the right coronary artery (RCA) obtained from one healthy volunteer, reconstructed at the two fully-resolved cardiac phases and one intermediate phase... The RCA sharpens significantly as the cardiac cycle progresses from phase 1 to 2... The 3D cones whole-heart free-breathing coronary MRA technique reduces scan time and improves robustness to motion. 2D navigator images directly measure respiratory motion of the heart and provide robust motion correction even without navigator gating... Multiple resolved cardiac phases provide robustness to the initial choice of TD and subsequent heart-rate variations... Additional cardiac phases can be acquired to optimize the visualization of the left and right coronary trees, which may have different quiescent periods.

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Axial slice containing the RVA after navigator gating and correction for 2D displacement. Shown are the two resolved cardiac phases and an intermediate phase obtained from sliding window reconstruction. In this case, the RCA (arrow) sharpens as the cardiac cycle progresses from phase 1 to 2.
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Figure 3: Axial slice containing the RVA after navigator gating and correction for 2D displacement. Shown are the two resolved cardiac phases and an intermediate phase obtained from sliding window reconstruction. In this case, the RCA (arrow) sharpens as the cardiac cycle progresses from phase 1 to 2.

Mentions: Fig. 3 shows an axial slice containing the right coronary artery (RCA) obtained from one healthy volunteer, reconstructed at the two fully-resolved cardiac phases and one intermediate phase. The RCA sharpens significantly as the cardiac cycle progresses from phase 1 to 2.


Multi-phase coronary magnetic resonance angiography using a 3D cones trajectory
Axial slice containing the RVA after navigator gating and correction for 2D displacement. Shown are the two resolved cardiac phases and an intermediate phase obtained from sliding window reconstruction. In this case, the RCA (arrow) sharpens as the cardiac cycle progresses from phase 1 to 2.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3106483&req=5

Figure 3: Axial slice containing the RVA after navigator gating and correction for 2D displacement. Shown are the two resolved cardiac phases and an intermediate phase obtained from sliding window reconstruction. In this case, the RCA (arrow) sharpens as the cardiac cycle progresses from phase 1 to 2.
Mentions: Fig. 3 shows an axial slice containing the right coronary artery (RCA) obtained from one healthy volunteer, reconstructed at the two fully-resolved cardiac phases and one intermediate phase. The RCA sharpens significantly as the cardiac cycle progresses from phase 1 to 2.

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

3D whole-heart free-breathing coronary MRA simplifies prescription effort, requires less patient cooperation, and supports retrospective reformats at arbitrary planes... To reduce the scan time and improve the motion robustness for 3D whole-heart free-breathing coronary MRA by using the 3D cones readout trajectory (Fig. 1) combined with 2D spiral navigators and resolving multiple cardiac phases... The acquisition scheduling scheme supported sliding window reconstruction of multiple intermediate cardiac phases... Fig. 3 shows an axial slice containing the right coronary artery (RCA) obtained from one healthy volunteer, reconstructed at the two fully-resolved cardiac phases and one intermediate phase... The RCA sharpens significantly as the cardiac cycle progresses from phase 1 to 2... The 3D cones whole-heart free-breathing coronary MRA technique reduces scan time and improves robustness to motion. 2D navigator images directly measure respiratory motion of the heart and provide robust motion correction even without navigator gating... Multiple resolved cardiac phases provide robustness to the initial choice of TD and subsequent heart-rate variations... Additional cardiac phases can be acquired to optimize the visualization of the left and right coronary trees, which may have different quiescent periods.

No MeSH data available.