Ultrasonic imaging device with noise preventing structure
US5243989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Apr 16, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/4405
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic imaging and diagnosing device comprises a section to be inserted into the body cavity, an ultrasonic wave transmitting and receiving section located at the front end of the inserting section, a conductive hollow shaft arranged in the inserting section and connected to the ultrasonic wave transmitting and receiving section, a scanning device for scanning the body cavity while changing the direction of ultrasonic wave transmitted from the ultrasonic wave transmitting and receiving section, a circuit for receiving electric signals applied from the ultrasonic wave transmitting and receiving section, and a signal cable passed through the hollow shaft to connect the ultrasonic wave transmitting and receiving section to the signal receiving circuit. Both of an outer conductive line of the signal cable and the hollow shaft are connected to the common of the signal receiving circuit to prevent noises from entering into the signal cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.