Alampallam R Ramachandran

20040102703, May 27, 2004

Nov 26, 2002

10/304350

Patrick Behren - Bellevue WA, US
Alampallam Ramachandran - Sammamish WA, US
Zoran Banjanin - New Castle WA, US
Wayne Gueck - Redmond WA, US

Siemens Medical Solutions USA, Inc.

A61B008/00

600/443000

Methods and systems for improving an ultrasound image quality are provided. On demand transmission of unsustainably high power ultrasonic pulses are temporary or spatially interleaved with low power, zero power, or standard ultrasonic pulses. In response to a user initiated trigger, a physiological trigger, a system trigger, or external equipment trigger, the unsustainably high power pulses provide better signal-to-noise ratio and/or allow increased imaging frequencies for difficult to image patients in any of various modes, such as B-modes, harmonic B-mode responsive to tissue or contrast agent, or color flow modes. Unsustainably high power ultrasonic pulses cause an increase in the tissue temperature within the body and at the interface between the transducer and the skin. Standard imagining or standard high power pulses may increase either temperature by around 6 C., such as from a body normal 37 C. to an average of 43 C. over time. The unsustainably high power ultrasonic pulses may cause the temperature to exceed 43 C. for a limited time period. For example, the in-situ temperature may be increased to 50 C. for one second, but the temperature is not sustained at this level. Tissue damage may occur for increased temperature over a long period of time, unlike the standard 43 C. for ultrasound imaging. A thermocouple or/and software for temperature and procedure monitoring prevent operator errors in causing harm to patient and/or transducer.

20050215892, Sep 29, 2005

Mar 22, 2004

10/805783

Charles Emery - Renton WA, US
Zoran Banjanin - Newcastle WA, US
Chi-Yin Lee - Bellevue WA, US
Alampallam Ramachandran - Sammamish WA, US
John Dennis - Renton WA, US

A61B008/00
A61B008/06

600437000, 600459000

A system and method for cooling an entirely or partially immersed mechanical or other type of transducer array is disclosed. Motion/flow of the immersion fluid is induced either by motion of the mechanical transducer itself, where the transducer is of the mechanically movable type, or by a separate motion-inducing mechanism located in or coupled with the fluid-filled, or partially filled, array housing. The resultant fluid flow/motion increases, i.e. more efficiently utilizes, the thermal carrying capacity of the immersion fluid by more uniformly distributing the thermal energy convected from the transducer array throughout the fluid volume. This results in an improved ability to cool the transducer array. The disclosed cooling system and method may be used in such a way so as to not substantially inhibit operation of the transducer array.

20200097496, Mar 26, 2020

Dec 27, 2018

16/233420

- San Francisco CA, US
Naren M. Chittar - Saratoga CA, US
Alampallam R. Ramachandran - Bellevue WA, US
Anuprit Kale - Oakland CA, US
Tiffany McKenzie - San Francisco CA, US
Sitaram Asur - San Clara CA, US
Jacob Nathaniel Huffman - Oakland CA, US

G06F 16/35
G06T 11/20
G06F 16/33
G06F 16/332
G06N 20/00

A data processing system analyzes a corpus of conversation data collected at an interactive conversation service to train an intent classification model. The intent classification model generates vectors based on the corpus of conversation data. A set of intents is selected and an intent seed input for each intent of the set of intents is input into the model to generate an intent vector corresponding to each intent. Vectors based on user inputs are generated and compared to the intent vectors to determine the intent.