(Gs)The slice select gradient is a magnetic field gradient applied to select the slice position in the direction of this gradient (x-direction). For orthogonal slices, the magnetic field gradient is applied perpendicular to the desired slice plane. Oblique and double-oblique slices are exited by simultaneously applying 2 or 3 gradient fields.

(SEMS) This pulse sequence is composed of a 90° RF pulse followed by a 180° refocusing pulse. Both RF pulses are applied in the presence of a slice select gradient.
By choosing of different TR and TE, depending on the T1 and T2 values of the tissues, proton density, T1 weighted and T2 weighted images can be acquired.
The inversion recovery option enlarge the RF pulses with a 180° inverting pulse, applied a TI time before the beginning of the pulse sequence in order to manipulate image contrast.
See also Spin Echo Sequence.

From Hitachi Medical Systems America Inc.;
Hitachi expanded its portfolio with the Echelon™ 1.5T. The MRI scanner combines a compact magnet and a scalable 8-channel RF system with high-performance gradients and slew rate to select short echo times, small field of views, high matrices and thin slices. Standard features of the Echelon MRI system include higher-order active shim, RAPID (parallel imaging for use on brain MRI, body, cardiovascular imaging, and orthopedic coils), multiple coil ports, and an advanced reconstruction engine.

From GE Healthcare;
'EXCITE technology has the potential to open the door to new imaging techniques and clinical applications, leaping beyond conventional two and three-dimensional MRI to true 4D imaging that will improve the diagnosis of disease throughout the human body from head to foot.' Robert R. Edelman, M.D., Professor of Radiology at Northwestern University Medical School and Chairman, Department of Radiology, at Evanston Northwestern Healthcare.

From GE Healthcare;
GE's Signa Contour/i system uses the innovations like K4 technology and real-time interactive imaging. This compact magnet with wide-flare gantry obtains high patient comfort with low costs.