Performance comparison of 8, 16 and 32 column RF birdcage resonators

Author

Pascone, Romeo ; Vullo, Thomas ; Tankhiwale, Arun ; Cahill, Patrick T.

Author_Institution

Manhattan Coll., Riverdale, NY, USA

Volume

2

fYear

1995

fDate

21-28 Oct 1995

Firstpage

1136

Abstract

This study compares performance characteristics for birdcage coils having 8, 16 and 32 columns. Self and effective (self plus mutual) inductances and resistances were calculated for 6 coils having 8, 16 and 32 columns, and quality factors were determined using self (Q_s) and effective (Q_e) inductances. Q_s decreased with increasing number of columns where the average Q_s ratio for column ratios of 16:8 and 32:8 were 0.85 and 0.65, respectively. Q_e increased with increasing number of columns, where the values for 16:8 and 32:8 were 1.05 and 1.11. Using Biot-Savart calculations, improved field uniformity was seen with a greater number of columns. This study quantified the advantage of fabricating birdcage coils with a greater number of columns

Keywords

biomedical NMR; biomedical equipment; coils; inductance; resonators; transmission line theory; 16 column; 32 column; 63.4 MHz; 8 column; Biot-Savart calculations; MRI; RF birdcage resonators; birdcage coils; column ratios; effective inductances; field uniformity; performance characteristics; quality factors; resistances; self inductances; Capacitance; Coils; Educational institutions; Hospitals; Inductance; Magnetic resonance imaging; Performance evaluation; Q factor; Radio frequency; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-3180-X

Type

conf

DOI

10.1109/NSSMIC.1995.510463

Filename

510463