Table of Contents
What does T1 value mean in MRI?
The T1 value is specifically defined as the time when longitudinal proton magnetization recovers approximately 63% of its equilibrium value (8). DE-CMR imaging has been widely used to detect and assess myocardial scar and perfusion.
What do T1 weighted images show?
T1-weighted image (also referred to as T1WI or “spin-lattice” relaxation time) is one of the basic pulse sequences in MRI and demonstrates differences in the T1 relaxation times of tissues.
What is proton density MRI used for?
Proton density (PD) is the most basic MRI measure, representing the apparent concentration of water protons (mobile hydrogen atoms) in each voxel.
What are T1 and T2 MRI used for?
It’s all about FAT and WATER The timing of radiofrequency pulse sequences used to make T1 images results in images which highlight fat tissue within the body. The timing of radiofrequency pulse sequences used to make T2 images results in images which highlight fat AND water within the body.
What is proton density weighted imaging?
Proton-density weighted images are related to the number of nuclei in the area being imaged (number of hydrogen protons), as opposed to the magnetic characteristics of the hydrogen nuclei. They are produced from the first echo. PD weighted images result when the contribution of both T1 and T2 contrast is minimized.
What is T1 and T2 used for?
T1 and T2 are technical terms applied to different MRI methods used to generate magnetic resonance images. Specifically, T1 and T2 refers to the time taken between magnetic pulses and the image is taken. These different methods are used to detect different structures or chemicals in the central nervous system.
What is T1 T2 mapping MRI?
The T1-map is generated at different degrees of longitudinal relaxation to receive a signal intensity vs time curve, from where T1 can be calculated. Similarly, T2 or T2*-maps are obtained from a signal intensity vs time curve based on different transverse relaxation times.
How do I know if I have T1 or T2 MRI?
The best way to tell the two apart is to look at the grey-white matter. T1 sequences will have grey matter being darker than white matter. T2 weighted sequences, whether fluid attenuated or not, will have white matter being darker than grey matter.