Dual-echo interleaved echo-planar imaging of the brain.
An interleaved echo-planar imaging (EPI) technique is described that provides images from 20 sections of the brain at two echo times (27 and 84 ms) in 1:05. Six echoes per image per repetition are collected in 24 repetitions of the pulse sequence. MR images of the brain obtained from five volunteers using the dual-echo EPI sequence, fast spin-echo (FSE), and conventional dual-echo spin-echo were evaluated qualitatively for diagnostic use and quantitatively for relative signal-to-noise ratio (SNR), contrast, and contrast-to-noise ratios (CNR).
Slavin
G S
GS
Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905, USA.
Butts
K
K
Rydberg
J N
JN
Jack
C R
CR
Riederer
S J
SJ
D000273:Adipose Tissue; D016477:Artifacts; D001921:Brain / Q000033:anatomy & histology*; D002555:Cerebrospinal Fluid; D002560:Cerebrovascular Circulation; D017352:Echo-Planar Imaging / Q000379:methods*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors