Neville D. Gai1, John A. Butman1
1Radiology & Imaging Sciences,
National Institutes of Health, Bethesda, MD, United States
A
correction scheme for modulated longitudinal magnetization and incomplete
inversion recovery Look-Locker sequence with
balanced SSFP acquisition is described. Correction for such a scheme
typically uses a three parameter model which requires acquisition of several
(6 to 10) phases. It is shown that the two parameter inversion recovery model
provides excellent fit over a wide range of TR/T1 and flip angle parameter
space. The T1* obtained is easily
corrected using a linear model. The correction was tested in phantoms and in
head scans of several volunteers and shown to be accurate. Use of the two
parameter model requires fewer acquisition phases (3 to 5) leading to
improved temporal and spatial resolution.
Keywords