Method and apparatus for non-invasively deriving and indicating of dynamic characteristics of the human and animal intracranial media
US5388583A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Sep 1, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4064
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic non-invasive technique is descried for deriving the time dependencies of characteristics of certain regions in the intracranium medium. Precise measurements of the transit travel times of acoustic pulses are made and processed to extract variable portions indicative of, for example, the pulsatility due to cardiac pulses of a basal artery or a cerebroventricle or the variation in the pressure of brain tissue, as well as changes in the cross-sectional dimension of the basal artery and ventricle. In one technique, the transit time variations attributable to cardiac pulses are extracted by processing higher harmonics in the frequency domain. Frequency and phase detection techniques are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.