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Pencil beam excitation using a 2D spatially selective adiabatic T2-prep for imaging the left coronary arterial system

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Full FoV images were acquired with both the conventional T2-Prep and the 2D T2-Prep... The 2D T2-Prep scan was then repeated with signal foldover and a reduced FoV (rFoV: 120 × 120 mm, matrix size 80 × 80)... In comparing the T2-Preps, the 2D T2-Prep's mean blood and myocardium SNRs (580.2 and 191.2, respectively) stayed within the same range as the conventional T2-Prep's (606.1 and 191.4)... The 2D T2-Prep also preserved blood-myocardium CNR (388.1) as compared to the conventional T2-Prep (415.8), demonstrating that the 2D T2-Prep adequately maintains T2-weighting... Vessel sharpness was also comparable (58.4% using the conventional T2-Prep vs. 58.5% using the 2D T2-Prep)... In going to a reduced FoV, the mean blood and myocardium SNR decreased slightly (453.9 and 141.8), as did CNR (312.0) and vessel sharpness (56.4%), but scan time was reduced by 60%... A 2D T2-Prep shows promise to both reduce respiratory motion artefacts and decrease scan time, while preserving the T2-weighting of a conventional T2-Prep... It should thus be considered as a potential tool in accelerated cardiac imaging.

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Top Row: Comparison of conventional adiabatic T2-Prep and the 2D spatially selective adiabatic T2-Prep. The region targeted by the 2D pulse is outlined by a dashed circle. Note the reduction in respiratory ghosting. Bottom Row: Comparison of cardiac anatomy using the conventional adiabatic T2-Prep, the 2D spatially selective adiabatic T2-Prep, and a reduced FoV image acquired using the 2D spatially selective T2-Prep.
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Figure 2: Top Row: Comparison of conventional adiabatic T2-Prep and the 2D spatially selective adiabatic T2-Prep. The region targeted by the 2D pulse is outlined by a dashed circle. Note the reduction in respiratory ghosting. Bottom Row: Comparison of cardiac anatomy using the conventional adiabatic T2-Prep, the 2D spatially selective adiabatic T2-Prep, and a reduced FoV image acquired using the 2D spatially selective T2-Prep.

Mentions: The simulated excitation profile of the 2D pulse can be seen in Figure 1, with sample in vivo images shown in Figure 2. In comparing the T2-Preps, the 2D T2-Prep's mean blood and myocardium SNRs (580.2 and 191.2, respectively) stayed within the same range as the conventional T2-Prep's (606.1 and 191.4). The 2D T2-Prep also preserved blood-myocardium CNR (388.1) as compared to the conventional T2-Prep (415.8), demonstrating that the 2D T2-Prep adequately maintains T2-weighting. Vessel sharpness was also comparable (58.4% using the conventional T2-Prep vs. 58.5% using the 2D T2-Prep). In going to a reduced FoV, the mean blood and myocardium SNR decreased slightly (453.9 and 141.8), as did CNR (312.0) and vessel sharpness (56.4%), but scan time was reduced by 60%.


Pencil beam excitation using a 2D spatially selective adiabatic T2-prep for imaging the left coronary arterial system
Top Row: Comparison of conventional adiabatic T2-Prep and the 2D spatially selective adiabatic T2-Prep. The region targeted by the 2D pulse is outlined by a dashed circle. Note the reduction in respiratory ghosting. Bottom Row: Comparison of cardiac anatomy using the conventional adiabatic T2-Prep, the 2D spatially selective adiabatic T2-Prep, and a reduced FoV image acquired using the 2D spatially selective T2-Prep.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4043848&req=5

Figure 2: Top Row: Comparison of conventional adiabatic T2-Prep and the 2D spatially selective adiabatic T2-Prep. The region targeted by the 2D pulse is outlined by a dashed circle. Note the reduction in respiratory ghosting. Bottom Row: Comparison of cardiac anatomy using the conventional adiabatic T2-Prep, the 2D spatially selective adiabatic T2-Prep, and a reduced FoV image acquired using the 2D spatially selective T2-Prep.
Mentions: The simulated excitation profile of the 2D pulse can be seen in Figure 1, with sample in vivo images shown in Figure 2. In comparing the T2-Preps, the 2D T2-Prep's mean blood and myocardium SNRs (580.2 and 191.2, respectively) stayed within the same range as the conventional T2-Prep's (606.1 and 191.4). The 2D T2-Prep also preserved blood-myocardium CNR (388.1) as compared to the conventional T2-Prep (415.8), demonstrating that the 2D T2-Prep adequately maintains T2-weighting. Vessel sharpness was also comparable (58.4% using the conventional T2-Prep vs. 58.5% using the 2D T2-Prep). In going to a reduced FoV, the mean blood and myocardium SNR decreased slightly (453.9 and 141.8), as did CNR (312.0) and vessel sharpness (56.4%), but scan time was reduced by 60%.

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

Full FoV images were acquired with both the conventional T2-Prep and the 2D T2-Prep... The 2D T2-Prep scan was then repeated with signal foldover and a reduced FoV (rFoV: 120 × 120 mm, matrix size 80 × 80)... In comparing the T2-Preps, the 2D T2-Prep's mean blood and myocardium SNRs (580.2 and 191.2, respectively) stayed within the same range as the conventional T2-Prep's (606.1 and 191.4)... The 2D T2-Prep also preserved blood-myocardium CNR (388.1) as compared to the conventional T2-Prep (415.8), demonstrating that the 2D T2-Prep adequately maintains T2-weighting... Vessel sharpness was also comparable (58.4% using the conventional T2-Prep vs. 58.5% using the 2D T2-Prep)... In going to a reduced FoV, the mean blood and myocardium SNR decreased slightly (453.9 and 141.8), as did CNR (312.0) and vessel sharpness (56.4%), but scan time was reduced by 60%... A 2D T2-Prep shows promise to both reduce respiratory motion artefacts and decrease scan time, while preserving the T2-weighting of a conventional T2-Prep... It should thus be considered as a potential tool in accelerated cardiac imaging.

No MeSH data available.