Marvin King

US Patent:

20020068870, Jun 6, 2002

Filed:

Jul 20, 2001

Appl. No.:

09/910621

Inventors:

Sheikh Alam - Somerset NJ, US
Ernest Feleppa - Rye NY, US
Marvin King - New York NY, US
Frederic Lizzi - Tenafly NJ, US

International Classification:

A61B008/00

US Classification:

600/446000

Abstract:

An apparatus for ultrasonic elastography includes a housing, a moveable surface, and a transducer in ultrasonic communication with the moveable surface. A driver is arranged to mechanically move the moveable surface with respect to the housing. The housing can also be formed such that the moveable surface is a moveable exterior surface of the housing, such as a compliant membrane, which is moved in response to the driver to induce tissue compression. The housing may be arranged to be held in an operator's hand. Alternatively, the housing may be arranged for an insertion into an opening in a patient's body. The driver may move the transducer or moveable exterior surface in a cyclical manner at a low frequency.

US Patent:

62559907, Jul 3, 2001

Filed:

May 11, 1999

Appl. No.:

9/309683

Inventors:

Marvin King - New York NY

Assignee:

Riverside Research Institute - New York NY

International Classification:

H01Q 324

US Classification:

342377

Abstract:

Signal processors that support transmit or receive beams of two dimensional array antennas generate an appropriate distribution of phase shifts and/or time delays for each of the elements in the antenna array. The signals are processed by row and by column, where corresponding elements are grouped using intermediate frequency tagging, i. e. , the elements of a first column are translated to a first intermediate frequency, the elements of a second column are translated to a second intermediate frequency, etc. Signals from elements of like rows are then summed and subjected to a row delay. The delayed signals are then summed and passed through a filter bank, where the summed signal is partitioned in accordance with the plurality of intermediate frequencies into a plurality of column signals. The column signals are subjected to a respective column delays, are translated to a common intermediate or baseband frequency and are summed to establish a received beam signal. The concept is applicable to multiple beam arrays and transmission arrays as well.