Variable bandwidth filtering for magnetic resonance imaging with pure phase encoding.

Magnetic resonance imaging with pure phase encoding (sometimes known as single point or constant time imaging) has many desirable advantages, but is usually time consuming in comparison to frequency encoding methods. In single point imaging the maximum signal bandwidth is proportional to both the phase-encoding gradient amplitude and the object size. It is usual practice to set the acquisition filter bandwidth to the maximum value expected during a measurement.

Quantitative 23Na magnetic resonance imaging of model foods.

Partial (23)Na MRI invisibility in muscle foods is often referred to as an inherent drawback of the MRI technique, impairing quantitative sodium analysis. Several model samples were designed to simulate muscle foods with a broad variation in protein, fat, moisture, and salt content. (23)Na spin-echo MRI and a recently developed (23)Na SPRITE MRI approach were compared for quantitative sodium imaging, demonstrating the possibility of accurate quantitative (23)Na MRI by the latter method.

Quantitative discrimination of water and hydrocarbons in porous media by magnetization prepared centric-scan SPRITE.

MRI has considerable potential as a non-destructive probe of porous media, offering the possibility of rapid quantification of local oil and water content. This potential has not yet, however, been completely realized. In this paper, we explore a general magnetization preparation approach to the discrimination of water and oil in a model, representative, porous medium.