Cart (Loading....) | Create Account
Close category search window
 

The PTB 83-SQUID system for biomagnetic applications in a clinic

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Drung, D. ; Physikalisch Tech. Bundesanstalt, Berlin, Germany

The PTB 83-SQUID (superconducting quantum interference device) system is described which is operated in a clinical environment. Integrated dc SQUID magnetometers with additional positive feedback (APF) are used in order to realize electronic first- or second-order gradiometer configurations. The dewar for the system has a flat bottom. It allows the detection of vertical (B/sub z/) and horizontal (B/sub x,y/) field components: 49 sensors (plus 14 reference magnetometers) are sensitive for B/sub z/ and 14 sensors (plus 6 reference magnetometers) for B/sub x,y/. The system is installed inside a standard shielded room (Vakuumschmelze type AK3b) in the Klinikum Benjamin Franklin, Steglitz, Berlin. A typical white noise level of 2.5 fT//spl radic/(Hz) has been measured in the first-order gradiometer mode. Due to the very low system noise level it became possible for the first time to detect the extremely weak neuromagnetic fields (5-10 fT peak amplitude) generated by the nerve roots deep in the lower back which are evoked by electrical nerve stimulation at the foot (200 Hz system bandwidth, 8000 responses averaged).<>

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:5 ,  Issue: 2 )

Date of Publication:

June 1995

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.