MRI QUIZ: MR GLOSSARY Exam Questions With Correct Answers

MRI QUIZ: MR GLOSSARY Exam Questions With Correct Answers. _________ is known as the specific frequency at which magnetic resonance in a nucleus can be excited and detected, and varies directly with magnetic field strength - answerLarmor Frequency A technique used to suppress fluids, utilizing a long echo time coupled with a long Inversion time is known as __________. - answerFLAIR (Fluid Attenuated Inversion Recovery) ____________ occurs when tissue outside the Field of View is undersampled, causing a misregistration of anatomical location, in the phase direction, but on the opposite side of the anatomical location, also known as wrap-around artifact - answerAliasing artifact _____________ is a term describing the containment of the static magnetic field through the use of secondary coils attached around the MRI scanner - answerActive shielding ________________ is due to the difference in resonant frequencies between fat and water, causing a phase shift in voxels containing fat and water - answerChemical shift artifact Describing image display, the ________ function scrolls through the entire sequence's images, giving the appearance of CSF flowing or cardiac movement, from the cycle of the images acquired - answerCine ____________ is a term used to describe the adjustment of the current within the shim coils on a per patient or per sequence basis - answerActive shimming MR technique utilized to image flowing blood and specific vasculature structures: - answerMagnetic resonance angiography (MRA) MR technique which quantitatively assesses the mechanical properties of tissues, based on the propagation of shear waves: - answerMagnetic resonance elastography (MRE) What is the term for the echo generated by switching a pair of dephasing and rephasing gradients, without the use of a 180° refocusing pulse? - answerGradient Echo (GE) _________ is defined as the number of times that a periodic function or vibration repeats itself in a specified time. It is usually measured in