Latest ARMRIT Exam Review |UPDATED|

Latest ARMRIT Exam Review |UPDATED| Different tissues that have signals that appear similar on an MR image are described as: A) hypointense B) hyperintense C) isointense D) isodense *Ans* isointense in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling like a spinning top. this motion is called A) precession B) resonance C) frequency D) angular momentum *Ans* precession magnetic resonance imaging is derived from the process known as: A) magnetic resonance angiography B) magnetic relaxation imaging C) nuclear magnetic resonance D) nuclear resonance imaging *Ans* nuclear magnetic resonance Once the nmv has moved away from equilibrium, the following will occur A) the longitudinal component will increase B) the transverse component will decrease C) the longitudinal component will stay the same D) the transverse component will increase *Ans* the transverse component will increase In MR, substances respond to a specific radio frequency which is known as: A) magnetic frequency B) radio frequency C) gyro-magnetic frequency D) resonance frequency *Ans* resonance frequency the introduction of gadolinium based contrast enhancement agents by intra-venous injection can involve passing through an abnormal blood brain barrier. the tissue compartments involved are the: A) intravascular to interstitial B) extracellular to intracellular C) hepatobiliary to renal D) extradural to renal *Ans* intravascular to interstitial t2 is the measurement of time fot the transverse component of the NMV to decrease what percentage of its maximum value after the application of a 90 degree radio-frequency pulse A) 33% B) 63% C) 37% D) 67% *Ans* 37% in the USA, the MRI system's magnetic field and vector that represents it is sym