Contrast resolution tissue equivalent ultrasound test object

US4331021A · kind A · utility

Assignee

• The United States of America as Represented by the Secretary of the Department of Health and Human Services · US

Inventors

• Hector Lopez · Round Rock, US
• Stephen W. Smith · Durham, US

Key dates

• Filing date: Sep 11, 1980
• Grant date: May 25, 1982
• Expiry date: Sep 11, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/52052
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A contrast resolution tissue-equivalent ultrasound test phantom comprises a block of material having ultrasonic propagation characteristics similar to that of human or animal tissue. A plurality of contrast objects are embedded in the block, each having a different reflectivity. The contrast objects have at least one dimension wherein the size of the object in cross-section decreases so that periodic ultrasonic scans of all of the objects simultaneously produce successive displays of plural cross-sectional patterns, the pattern in each display having the same size but different contrasts whereas the pattern size changes for successive displays.