Lutfi T Muftuler

US Patent:

20060244449, Nov 2, 2006

Filed:

Apr 25, 2006

Appl. No.:

11/411257

Inventors:

Lutfi Muftuler - Aliso Viejo CA, US
Gang Chen - Irvine CA, US
Orhan Nalcioglu - Newport Coast CA, US

International Classification:

G01V 3/00
H01Q 17/00

US Classification:

324318000, 029601000, 324322000

Abstract:

An MRI RF coil that is optimized for SENSE imaging is used in a method where the surface current density distribution on a coil former was calculated to maximize the SNRwithin a volume of interest. An analytic relationship was formulated between the SNRand surface current density on the coil former. The SNR at pixel ρ in a SENSE-MR image, SNR, is inversely proportional to the g-factor The g-factor was formulated in terms of the B1 distribution of the coils. By specifying the geometry of the desired coil former and using a finite element mesh, the surface current distribution was calculated to maximize the SNR, by minimizing (1/SNR) in the volume of interest using a least squares procedure. A simple two-coil array was tested and phantom images were collected. The results show that the new coil design method yielded better uniformity and SNR compared to standard coils.

US Patent:

20180136297, May 17, 2018

Filed:

May 13, 2016

Appl. No.:

15/574287

Inventors:

- Milwaukee WI, US
Lutfi Tugan Muftuler - Menomonee Falls WI, US

International Classification:

G01R 33/563
G01R 33/561
G01R 33/565

Abstract:

Systems and methods for performing diffusion-weighted multi-spectral imaging (“MS!”) with a magnetic resonance imaging (“MRI”) system are provided, Diffusion-weighted images can thus be acquired from a subject in which a metallic object, such as an implant or other device, is present. In general, a two-dimensional or three-dimensional diffusion-weighted PROPELLER acquisition is performed to acquire data from multiple different spectral bins. Images from the spectral bins are reconstructed and combined to form diffusion-weighted composite images. Non-CPMG phase-cycling and split-blade PROPELLER techniques are combined with PROPELLER MSI metal artifact mitigation principles to this end.