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The relationship between fMRI temporal signal to noise ratio and necessary scan duration.
Although useful, breath-holding imposes constraints on scan duration, which in turn limits the achievable resolution and SNR.
Background: Recent advances in diffusion weighted (DW) Magnetic Resonance Imaging (MRI) hardware have led to dramatic improvements of the data quality and reductions in scan duration.
The relationships between scan duration, signal-to-noise ratio (SNR) and sample size must be considered and understood to design optimal GABA-edited magnetic resonance spectroscopy (MRS) studies.
Motion, physiological effects, and scan duration all affect the achievable SNR in real brain images, making theoretical studies and simulations only partially useful.
Altogether these characteristics are expected to improve the contrast of the CT-scanner, especially for soft tissues, and to reduce both the scan duration and the absorbed dose.
Total scan duration was 165 min.
Minimal scan duration per bed position.
A constant scan duration was assumed for all simulations.
The scan duration ranged from 5 to 20 min.
Scan duration of WB planar images was 10 min.
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