Peripheral vascular array

US6323648A · kind A · utility

Assignee

• MEDRAD, Inc. · US

Inventors

• Kenneth W. Belt · Fort Atkinson, US
• Michael Reichel · Pittsburgh, US
• J. Michael Watral · Johnstown, US
• Stanley R. Lewandowski · Springdale Township, US
• Bradley Adams · Vandergrift, US
• Lisa Augustine · Lower Burrell, US
• Robert Bell · Pittsburgh, US

Key dates

• Filing date: Nov 26, 1997
• Grant date: Nov 27, 2001
• Expiry date: Nov 26, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3415
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An interface that couples a surface coil array having N receiving elements to an NMR scanner having M preamplifier inputs. The interface includes an RF switch array and a transmit/receive bias circuit. The RF switch array and the transmit/receive bias circuit are controlled by a control logic circuit. In response to a predetermined input, the control logic circuit causes a predetermined subset of the N receiving elements to be couple to the preamplifier inputs of the NMR scanner. Preferably, N may be larger than M.