Resolution measuring device for acoustical imaging systems and method of use
US4417582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1981 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Aug 5, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ultrasound imaging systems such as those utilized in breast scanning and diagnosis require not only periodic maintenance but also evaluation of the resolution and depth of field capability so as to provide maximum information to the clinician utilizing the system. The resolution measuring device preferred incorporates helically contorted filaments physically arranged to intersect at a point thereby forming a known gradient of divergence. Measurement of the translational distance from the intersection point to the point of resolution of imaged lines will, with knowledge of the gradient, permit facile determination of the separation distance which corresponds to the resolution of the ultrasound imaging system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.