Exact(3)
This corresponds to taking a single cardiac gate from an ECG-gated PET scan lasting 30 min using ten cardiac gates, for an equivalent scan duration of 180 s (instead of 36 s).
The top plot shows the changes in contrast recovery when motion compensation is fully performed (DUAL, as in dual-gated studies), or only ECG gating is performed (ECG, one cardiac gate blurred by the respiratory motion) or if ECG gating is performed starting from a dataset where the respiratory motion has been compensated (ECG+R, one cardiac gate, less noisy).
In the case of a shorter scan, for example, using a single cardiac gate from a study with motion correction would increase the fraction of the counts that are used to create the motion-free image.
Similar(57)
A slice selective, cardiac-gated cardiac gated 1-dimensional chemical shift imaging (1D-CSI) sequence was used to eliminate contamination from the liver, with spatial pre-saturation of lateral skeletal muscle to avoid spectral contamination.
Conventional cardiac gating is limited by high noise level on parametric images.
Cardiac gating techniques and assessment of velocity distribution were performed to gain additional information.
They were then exploited to perform off-line phase-based gating of the PET dataset using in-house developed software (five respiratory gates and ten cardiac gates).
The scan time of 36 s corresponds to a single gate taken from a doubly gated 30 min PET scan, using five respiratory and ten cardiac gates.
Similar to respiratory motion correction, data driven cardiac gating may offer practical advantages and may be further developed in the future.
Cine sequences with retrospective cardiac gating were used with the following parameters: cardiac phase =20, TR/TE =3.2/1.6 ms, slice thickness =10 mm, gapless between slices, flip angle =60°, matrix =192 × 256, field of view =380 × 380 mm.
Cardiac gating verified the same integral relationship of the vortex with the cardiac cycle as that described in vitro.Conclusion the geometric configuration of precuffed grafts induced vortices within the distal anastomoses in 17 out of 22 patients undergoing arterial reconstruction, thereby harnessing the haemodynamic forces that may suppress anastomotic hyperplasia and improve patency rates.
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