<unk> <unk>  is a pulse sequence used in Magnetic Resonance Imaging.
The pulse sequence is an inversion<unk>  technique that nulls<unk> s. For example, it can be used in brain imaging to suppress Cerebrospinal<unk>  (CSF) so as to bring out the periventricular hypertintense lesions, such as multiple sclerosis (MS) plaques.
By carefully choosing the TI, the signal from any particular tissue can be nulled. The appropriate TI depends on the tissue via the formula:
One should typically yield a TI of 70% of T1. In the case of CSF suppression, one aims for T2 weighted images.
Fluid attenuated inversion recovery
QRS complex
Polarization density
Oxygen Enhancement Ratio
USMLE Step 2-CK
T wave inversion
E/a ratio
Resistive index