Professional
Technical
IVT
TI
Also written as: TI — inversion time
Inversion time - the delay between inversion pulse and excitation pulse in inversion recovery sequences.
Full Definition
Inversion time (TI) is the time interval between the 180-degree inversion pulse and the subsequent 90-degree excitation pulse in inversion recovery MRI sequences. This parameter is critical for tissue contrast optimization, particularly in FLAIR sequences where cerebrospinal fluid signal is nulled. Proper TI selection enables specific tissue suppression or enhancement in clinical imaging protocols.
Usage
Usage note: Distinguish from TE (echo time) and TR (repetition time) in sequence parameter documentation.
In Context
- "FLAIR imaging utilized a TI of 2400 ms to suppress cerebrospinal fluid signal." — Imaging protocol
- "The optimal TI varies with field strength and tissue relaxation properties." — Technical manual
Also known as
inversion time
Don't confuse with
TE
TR