Aspect Imaging Ltd.

Aspect Ai Ltd.

Boaz Shapira

Uri Rapoport

Peter Bendel

A method of determining the frequency and amplitude of a perturbing cyclic EM signal in the field of view of an NMR or MRI system during acquisition of a spin-echo spectrum. The frequency &#x3bd; of the perturbing electromagnetic signal is determined by acquiring a plurality of n 2D NMR spectra with n different values of T; selecting a peak in each of the n NMR spectra; determining the area of the peak; calculating possible frequencies along the &#x3a9;axis; and eliminating results that do not match the position along the &#x3a9;axis, thereby obtaining &#x3bd;. The amplitude &#x3b1; of the perturbing electromagnetic signal is determined by calculating the square of the area of the peak.

Diagnostic tool for EM perturbations in MRI systems

Method of determining a velocity profile of a fluid flowing through a conduit, the method including applying a saturation pulse on spins of magnetic field-sensitive nuclei in the fluid, measuring a signal of the fluid to determine position of the magnetic field-sensitive nuclei, the measurement carried out at a recovery time 'TR' and at a distance 'd' within the conduit, determining within the conduit a radial distance &#x2018;r&#x2019; characterized by a local minimum in the measured signal, wherein the radial distance &#x2018;r&#x2019; is measured from the center of the conduit, and determining a velocity profile of the fluid at the radial distance, based on the magnetic field-sensitive nuclei.

System and method for measuring velocity profiles

System and method for analyzing changes in a fluid flowing through a conduit, including defining at least one coordinate within said conduit, said conduit having a first plurality of slices, receiving at least one known value for at least one property of the fluid, measuring said fluid using magnetic resonance, determining at least one image from the measured fluid, the at least one image having a second plurality of slices for said at least one coordinate, determining a second set of values for said at least one property of said fluid, comparing the first set of values and second set of values for said at least one property to determine a difference value, checking deviation of the determined difference from a predetermined value for said fluid, and issuing an alert if the deviation is not substantially zero.

System and method for analysis of fluids flowing in a conduit

A method of reducing artifacts produced during Fast Spin Echo measurements made using permanent magnet NMR instruments. The method includes applying encoding gradients that do not switch signs throughout the experiment. Prior to the 90&#xb0; RF pulse, a strong RM gradient pulse is given to produce a dominant and constant residual magnetization. The encoding is done through the combination of encoding gradients with the aid of the 180&#xb0; RF pulses of the echo train. A first constant encoding gradient is given before the first 180 pulse. Then two variable encoding gradients are provided after each 180 pulse; one applied prior to and one applied subsequent to each acquisition in the echo train.

Growing community of inventors

Rechovot, Israel

Boaz Shapira