T1

T1, or longitudinal relaxation time, is a property of tissues used in MRI to describe how quickly they recover their normal magnetic state after being disturbed by a magnetic pulse. Think of it like how quickly a sponge absorbs water after being squeezed; some tissues "bounce back" faster than others. T1 helps differentiate different types of tissue based on how they respond over time, aiding in medical imaging to detect abnormalities and understand tissue composition. It’s an important parameter for producing detailed and informative MRI pictures.