The most common MRI sequences are T1-weighted and T2-weighted scans. T1-weighted images are produced ... When injected during the scan, Gad changes signal intensities by shortening T1. Thus, Gad is ...

Bradley: A proton density-weighted image is halfway between a T1- and a T2-weighted image ... Bradley: Signal to noise is the currency of MRI. High signal to noise can be traded for faster ...

The same area on the T2-weighted scan is dark with a surrounding bright signal. This is the characteristic picture of an acute (approximately 3 days old) hemorrhage on MRI. In the acute stage, ...

Functional MRI uses the principle ... of the pulse and collection of the signal is called Time to Echo (TE). In fMRI, two different relaxation times, T1 and T2, are used to characterize a tissue.

The following MRI features were considered: tumor margins (sharp versus undefined); signal intensity on T1 and T2 images (homogeneous vs heterogeneous); pattern of enhancement (ring, nodular or ...

Prostate zonal anatomy is best demonstrated with MRI. On T2-weighted sequences ... it is important that a T1-weighted sequence is also performed to demonstrate high signal blood products.

The cyst followed fluid signal on magnetic resonance imaging (hypointense to isointense relative to CSF on T1-weighted images, hyperintense on T2-weighted images, and suppressed on fluid-attenuated ...