Relaxation time mapping of short T*2 nuclei with single-point imaging (SPI) methods.
New techniques for quantitative mapping of T1, T2, and T*2 are proposed, based on the single-point imaging (SPI) method, for materials with short nuclear magnetic resonance relaxation times which cannot be imaged with traditional methods. Relaxation times extracted from two-dimensional images of uniform doped agarose phantoms (T*2 approximately 60-210 microseconds) as well as hardened mortar (T*2 approximately 220 microseconds) and polymers (T*2 approximately 20-100 microseconds), using these techniques, agreed with bulk measurements. The method was then applied to a partially dried cylindrical concrete sample (T*2 approximately 115 microseconds).
Beyea
S D
SD
Department of Physics, MRI Centre, University of New Brunswick, Fredericton, Canada.
Balcom
B J
BJ
Prado
P J
PJ
Cross
A R
AR
Kennedy
C B
CB
Armstrong
R L
RL
Bremner
T W
TW
D007089:Image Enhancement; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D019047:Phantoms, Imaging; D012685:Sepharose / Q000737:chemistry
D012685:Sepharose