DESIGN AND EVALUATION OF A TRANSVERSE GRADIENT SET FOR MAGNETIC-RESONANCE-IMAGING OF THE HUMAN BRAIN

Authors
FISHER BJ DILLON N WILKINSON AA CARPENTER TA HALL LD
Citation
Bj. Fisher et al., DESIGN AND EVALUATION OF A TRANSVERSE GRADIENT SET FOR MAGNETIC-RESONANCE-IMAGING OF THE HUMAN BRAIN, Measurement science & technology, 7(5), 1996, pp. 838-843
Citations number
10
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Measurement science & technology → ACNP
ISSN journal
09570233
Volume
7
Issue
5
Year of publication
1996
Pages
838 - 843
Database
ISI
SICI code
0957-0233(1996)7:5<838:DAEOAT>2.0.ZU;2-6
Abstract
A genetic algorithm has been used to design a 35 cm diameter transvers e gradient set for human brain imaging. Despite strict constraints on the maximum coil length (33 cm), gradient performance comparable to th at from far longer sets of conventional geometry is achieved; thus the gradient efficiency is 0.13 mT m(-1) A(-1) with a 24% standard deviat ion from this within a 26 cm sphere. Phase maps obtained using a gradi ent-acquisition for shimming sequence were used to test the linearity of the gradients without requiring a complex phantom.