These techniques mostly rely on echo planar imaging (EPI) [6] for spatial encoding of the magnetic resonance image because of its fast scan time, enabling rapid volumetric coverage over the brain reducing temporal instabilities associated with multi-excitation techniques (e.g. [7], [8]).
However, a high temporal resolution needs to be matched with a very fast scan time.
This technique has higher resolution, greater detection depth and image size, and faster scanning time than CSLM.
MDCT provides faster scanning time and higher z axis resolution than single-slice helical CT, leading to high quality real-time 3-D images [ 13].
Compared to transmission mode (MS-only) operation, the combination of high mobility resolving power, high ion utilization efficiency, and relatively fast scan times achieved with TIMS is shown to result in an improvement in mass spectral peak intensities of more than an order of magnitude.
In the latest generation of CT systems several benefits have been achieved, such as: significant decrease in the volume of iodine contrast agent injected, faster scan time (<1 s) and lower radiation dose.
MOLLI determination of T1 has advantages such as faster scan time, and smaller limits of agreement between repeated measures, than traditional T1 mapping techniques, and has been validated, at least in cardiac tissue [ 17, 18].
The transition to narrow fan-beam densitometers has led to faster scan times and better resolution; however, inter- or intra-device variation exists depending on several factors.
