University of Pennsylvania

Other

Mark A Elliott

Walter R T Witschey

Ravinder Reddy

Ari Borthakur

Francisco Contijoch

Eugene E Gualtieri

An adaptive real-time radial k-space sampling trajectory (ARKS) can respond to a physiologic feedback signal to reduce motion effects and ensure sampling uniformity. In this adaptive k-space sampling strategy, the most recent signals from an ECG waveform can be continuously matched to the previous signal history, new radial k-space locations were determined, and these MR signals combined using multi-shot or single-shot radial acquisition schemes. The disclosed methods allow for improved MRI imaging.

Method and device for magnetic resonance imaging data acquisition guided by physiologic feedback

A spin locked balanced steady-state free precession (slSSFP) pulse sequence combines a balanced gradient echo acquisition with an off-resonance spin lock pulse for fast MRI. The transient and steady-state magnetization trajectory is solved numerically using the Bloch equations and is shown to be similar to balanced steady-state free precession (bSSFP) for a range of T2/T1 and flip angles, although the slSSFP steady-state could be maintained with considerably lower RF power. In both simulations and brain scans performed at 7T, slSSFP is shown to exhibit similar contrast and SNR efficiency to bSSFP, but with significantly lower power.

Spin locked balanced steady-state free precession (slSSFP) with off-resonance spin locked pulses interleaved with imaging gradients

A feeder includes a housing having spaced side walls, including an angulated roof overlying a floor, with the roof including a roof trough at a forward edge of the roof to direct rainwater away from the floor surface. The organization is arranged to include at least one feeder bowl mounted within the floor, with a chute directed rearwardly of the housing projecting through an associated fence wall to permit filling selectively of food within the bowl exteriorly of the fence.

Growing community of inventors

Bryn Mawr, PA, United States of America

Mark A Elliott