Abstract: The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as Long-Term Evolution (LTE). The present disclosure provides a device for variable signal attenuation equipped in a stack-up structure inside an RFIC. The device for signal attenuation comprises: a first transmission line positioned on a first layer inside the RFIC; a second transmission line positioned on a second layer, which is adjacent to the first layer, and electromagnetically coupled to the first transmission line; and a control unit. The first transmission line comprises an impedance control unit on one side. The control unit can variably control the impedance control unit.

Abstract: A method for providing at least one measurement by a magnetic resonance imaging (MRI) system of a tissue property or underlying tissue property in a region sufficiently close to a metal object, so that the metal object induces artifacts is provided. At least one magnetic resonance imaging signal from the region is acquired through the MRI system. The acquired at least one MRI signal is processed to correct for artifacts induced by the metal object. At least one tissue property or underlying tissue property measurement is extracted from the processed at least one MRI signal.

Abstract: A method of acquiring image data with an MRI system from an object using a sequence of tip-down and tip-up RF pulses is described. A slice-selective first pulse ? rotates the in-slice spins from the longitudinal axis (z) toward a transverse plane (x, y). Image data is acquired from the in-slice spins during a free precession interval (Tfree) in which the in-slice spins precess along the transverse plane (x, y). A spatially tailored, non-slice-selective second pulse ?({right arrow over (r)}) is applied for rotating the in-slice spins from the transverse plane (x, y) to at least substantially along the longitudinal axis (z). A third pulse S may be applied to the in-slice and out-of-slice spins to eliminate (spoil) residual transverse signal from out-of-slice spins.

Abstract: A method for providing at least one measurement by a magnetic resonance imaging (MRI) system of a tissue property or underlying tissue property in a region sufficiently close to a metal object, so that the metal object induces artifacts is provided. At least one magnetic resonance imaging signal from the region is acquired through the MRI system. The acquired at least one MRI signal is processed to correct for artifacts induced by the metal object. At least one tissue property or underlying tissue property measurement is extracted from the processed at least one MRI signal.

Abstract: A method of acquiring image data with an MRI system from an object using a sequence of tip-down and tip-up RF pulses is described. A slice-selective first pulse ? rotates the in-slice spins from the longitudinal axis (z) toward a transverse plane (x, y). Image data is acquired from the in-slice spins during a free precession interval (Tfree) in which the in-slice spins precess along the transverse plane (x, y). A spatially tailored, non-slice-selective second pulse ?({right arrow over (r)}) is applied for rotating the in-slice spins from the transverse plane (x, y) to at least substantially along the longitudinal axis (z). A third pulse S may be applied to the in-slice and out-of-slice spins to eliminate (spoil) residual transverse signal from out-of-slice spins.