AMRIT Practice Test 1 Questions With Verified Answers

different tissues that have signals that appear similar on a mr image are described as: - Answer 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: - Answer Prescession Magnetic resonance imaging is derived from the process known as: - Answer Nuclear magnetic resonance Once the net magnetization vector (nmv) has moved away from equilibrium, the following will occur: - Answer The transverse component will increase In MRI, substances respond to a specific radio frequency which is known as: - Answer Resonance Frequency The introduction of gadolinum based contrast enhancement agents by intra-venous injection can involve passing through as abnormal blood brain barrier. The tissue compartments involved are the: - Answer intravascular to interstitial T2 is the measurement of time for the transverse compnent of the nmv to decrease what percentage of its maximum value after application of a 90* radio-frequency pluse? - Answer 37% In the USA the MRI systems main magnet field and the vector that represents it is symbolized - Answer B0 the resonance frequency of any substance in a magnetic field can be calculated by employing the - Answer Larmor equation in a pulse sequence transmitting a initial 90-degree radio frequency pulse will cause the nmv to: - Answer shift in both size and direction