Abstract: The present invention uses spectral-spatial 180° refocusing pulses in the point resolved spectroscopy (PRESS) localization sequence. The PRESS sequence uses a series of three pulses having a tilt angle pattern of 90°-180°-180°. The first excitation pulses in the present invention is a spatially selective 90° tilt angle pulse. The following two pulses are spectral-spatial refocusing pulses which provide multi-dimensional selectivity. This feature allows for enhanced solvent suppression, reduced chemical shift induced spatial displacement and an ability to refocus weakly coupled spins. In a preferred embodiment, the spectral-spatial pulses are time-asymmetric and identical, providing for a linear phase profile by means of phase compensation between the two refocusing pulses. Alternatively, a linear phase profile can be provided by using time-symmetric refocusing pulses. The time-asymmetric feature is preferred because it results in lower applied RF power and shorter echo times.

Abstract: An eyeglass frame holder having a quick release two piece band with mushroomed shaped flexible tips mountable upon each of two bands, or eyeglass supports which tips are interconnected with eyeglass temple stems or supports through a hole in each of the stems, together with a C-shaped resilient clasp for making surface contact with the tips. The two pieces of the band are connected behind the eyeglass wearer's head with adjustable self-engaging, removable gripping pads (velcro).