Ilya S Simovsky

7538548, May 26, 2009

May 25, 2006

11/420224

Hector E. Avram - Foster City CA, US
James D. Hale - Berkeley CA, US
Ilya Simovsky - Redwood City CA, US
David M. Kramer - Corte Madera CA, US

Toshiba Medical Systems Corp. - Otawara-Shi

G01V 3/00

324307

In preferred embodiments, a fast spin echo imaging technique is provided that is insensitive to violations of the Carr Purcell Meiboom Gill (CPMG) condition. Diffusion gradients disrupt the CPMG condition, and, hence, the present fast spin echo method is compatible with diffusion measurements and diffusion weighted imaging. The preferred embodiments of the present technique involve splitting of spin echoes into echo pairs. Spin echoes are split by adjustment (in magnitude or duration) of an initial readout gradient pulse. A train of echo pairs is captured. A first image is constructed using the first echoes of each pair. Also, a second image is constructed using the second echoes of each pair. Hybrid radial Cartesian methods are used for constructing the first and second images. The first and second images are constructed independently of one another.

20050122105, Jun 9, 2005

Nov 5, 2004

10/981739

Hector Avram - Foster City CA, US
Ilya Simovsky - Redwood City CA, US

Toshiba America MRI, Inc. - South San Francisco CA

G01V003/00

324314000, 324309000

A method to separate two chemically-shifted components of water (w) and fat (f) signals by: (i) estimating the field inhomogeneity β through a treatment of the residuals of the Moore-Penrose solution of the following equations: cos(αβ)*w+cos [α(+β)]*f=real (I) and sin(αβ)*w+sin [α(+β)]*f=imaginary (I), and (ii) using the estimated β to determine the resulting solution for w and f from the original input signals I.