Hewlett-packard Company

Thomas A Shoup

Hewlett E Melton, Jr

Marcos Frid

Lewis Jones Thomas, Iii

Richard A Baumgartner

John N Dukes

Chandrasekar Venkatraman

Thomas P Stephens

David P Dolan

Thomas J Hunt

Jeff Morgan

Brian G Connor

James G Miller

A web access functionality embedded in a device includes modules for generating a device web page wherein the device web page enables selection of at least one control function for the device. The web access functionality also includes modules for accessing the device web page via a communication path such that a user of a web browser accesses the control function for the device through the device web page. The control function includes control functions for loading new information into the device via the communication path and control functions for providing notification messages via the communication path upon the occurrence of events in the device.

Device access and control using embedded web access functionality

A universally accessible healthcare device having a communication path and a server. The healthcare device generates a set of medical information and the server provides access to the medical information using an open standard network protocol on the communication path. HTML Files may be generated on the fly by the server in response to an HTTP command from a requesting web client.

Universally accessible healthcare devices with on the fly generation of

An ultrasonic probe including a sensor head having an array of ultrasonic transducer elements is disclosed. The sensor head is located at the tip of a flexible shaft. The flexible shaft houses a flex circuit which is electrically connected directly to the transducer elements. The flex circuit transmits electrical signals from the transducer elements to the handle of the probe. The flexible shaft is bendable in all directions and can bend in a sharp radius in the region near the tip of the flexible shaft.

Ultrasonic probe assembly and cable therefor

A system for deriving signals representing a selected cross sectional area and volume of a region of interest in tissue. In the preferred embodiment, area and volume of a fluid filled cavity contained in tissue on a real time basis are determined by launching pulses of ultrasonic pressure waves along a plurality of scan lines, detecting the locations along each line that are in fluid, deriving a signal representing the incremental area within fluid that is between adjacent scan lines, deriving a signal representing the cross sectional area of a cavity within a region of interest by summing the incremental areas and deriving a signal representing the volume of the cavity within a region of interest by revolving each incremental area about an axis of the cavity so as to form an incremental volume of revolution and summing the volume of revolution. The volume of then entire cavity is also attained by deriving the cross sectional area as just described, raising it to the 3/2 power and multiplying it by a coefficient including a function of the ratio of the long axis cross sectional area and short axis cross sectional area. Determination of the locations in fluid in the above calculations are preferably those at which a majority of an odd number of consecutive scan lines at like ranges are in fluid.

Tissue measurements

This invention provides a method for fabricating ultrasonic transducer arrays and various transducer arrays produced utilizing such methods. The method includes the steps of cutting a block of piezoelectric material to form a plurality of wafers, each wafer being of a predetermined thickness; forming the wafers into a spaced parallel array with a center-to-center spacing between the wafers substantially equal to one-half of the object wavelength (as this term is defined in the specification); and causing the space between the wafers to be filled with a substance having an acoustic impedance which differs from that of the piezoelectric material by an amount such that the reflection coefficient between the piezoelectric material and the substance is greater than 0.9. The predetermined thickness of the wafers may be equal to one-half the piezoelectric wavelength and the substance between the wafers may be formed at least mostly of air. A material of a depth substantially equal to the spacing between wafers required to achieve the desired periodicity may be affixed to one of the adjacent wafer surfaces of each space, and this material may either be etchable and etched away to form a precise air gap between the wafers, or the material may be formed in a pattern with substantially more area without material than with material. Alternatively, a material having the required acoustic impedance mismatch, and preferably also having a relatively high absorption coefficient, is placed between each two adjacent wafers when the wafers are formed into the array.

Ultrasonic transducer arrays and methods for the fabrication thereof

Apparatus for deriving signals indicating a condition of tissue within an area by launching spaced supersonic pulses into a body under examination and detecting the power of supersonic waves scattered from locations along a plurality of known paths. Gain control elements are provided for compensating for changes in amplitude of the scattered supersonic waves resulting from their passage through blood or tissue, the increased attenuation with frequency of the spectrum of the launched pulses and the focussing of the launched pulses. Compensation for ring-down and the attenuation of the chest wall is also provided.

Techniques for calculating ultrasonic integrated backscatter using

A circuit for detecting a Frequency Modulated (FM) signal is provided. An amplitude limited FM signal is propated through a delay circuit comprising a plurality of cascaded saturating inverters. A Boolean logic 'Exclusive Or' (XOR) operation is performed between the FM signal before entering the delay circuit and after exiting the delay circuit.

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Lowell, MA, United States of America

Thomas A Shoup