Angiography using ultrasound
US5394874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1994 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Jan 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/901
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for performing angiography of a subject under examination in an ultrasonic imaging apparatus. A set of ultrasonic reference pulses along each of a series of parallel vectors is emitted into the subject under examination, echoes are received, and a plurality of data samples are obtained. From each of the plurality of data samples a plurality of basis functions are removed to remove clutter and generate a plurality of processed samples. The processed samples are averaged and temporally filtered with signals displayed in a previous time period to generate a second averaged signals. The temporal filtering is performed using a filter coefficient which approximates a full cardiac cycle of the subject under examination. Each of the second plurality of signals is converted to a color value to generate a first plurality of color values within a range of color values from the first color value to a second color value, wherein the first color value represents a minimum amplitude of the third plurality of signals to be displayed and the second color value represents a maximum amplitude of the second plurality of signals to be displayed. The first plurality of color values …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.