Limitations On Biomagnetic Imaging

Robert E. Alvarez

doi:10.1117/12.968609

27 June 1988 Limitations On Biomagnetic Imaging

Robert E. Alvarez

Proceedings Volume 0914, Medical Imaging II; (1988) https://doi.org/10.1117/12.968609
Event: Medical Imaging II, 1988, Newport Beach, CA, United States

Abstract

The effects of thermal radiation and quantum detector noise on biomagnetic imaging are discussed. The thermal noise due to the reception of blackbody radiation by the magnetometer sensing coil is described. Quantum limits on detector performance are calculated by first deriving the noise in a SQUID magnetometer based on a small signal circuit model. The quantum limits of SQUID noise are then applied to the noise model. The results of the calculations show that thermal radiation noise is negligible compared to quantum noise which, in turn, is about a factor of 50 less than the minimum biomagnetic fields now measurable. The models also show that the noise depends on the effective volume of the pickup coil and the relationship of imaging resolution to pickup coil geometry is described.

Citation Download Citation

Robert E. Alvarez "Limitations On Biomagnetic Imaging", Proc. SPIE 0914, Medical Imaging II, (27 June 1988); https://doi.org/10.1117/12.968609

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available