Welcome to your MRI - A Name [After being placed in an external magnetic field, high energy hydrogen nuclei point in which direction?] Parallel Anti-paired Anti-parallel Perpendicular None . [The rate at which signal samples are taken during frequency encoding is known as the _______.] Readout rate Frequency rate Sampling rate None of the above None . [The P wave of the ECG represents which phase of the cardiac cycle?] Atrial systole Ventricular systole Ventricular diastole Atrial diastole None . [When TR is increased, acquisition time _______.] Increases Decreases Stays the same None . [Blood flow that has consistent velocities within a vessel is known as what type of flow?] Turbulent flow Laminar flow Vortex flow Stagnant flow None . [The external magnetic field in a superconducting magnet is said to be what type of magnetic field?] Static Kinetic Gradient Resistive None . [Which of the following is an example of a non-neoplastic disease of the brain that enhances with the injection of gadolinium?] Meningitis Demyelinating disease Cerebral infection All of the above None . [In clinical MRI, the homogeneity of the magnet should be at least _____.] 1 tesla per cm 10 parts per million .5 gauss per meter 32 megahertz None . [Figure is a diagram showing what type of pulse sequence?] Partial saturation Spin echo Inversion recovery Gradient echo None Comment . [At a field strength of 1.0 tesla, the approximate T1 relaxation time for spleen tissue is ______.] 360ms 380ms 400ms 480ms None . [Material that is strongly attracted to a magnetic field is said to be _______.] Electromagnetic Paramagnetic Ferromagnetic Diamagnetic None . [The vascular imaging method that maximizes vascular contrast while also suppressing stationary tissue is known as ______.] Magnetic resonance mammography Magnetic resonance angiography Black Blood imaging Zeugmatography None . [The ratio that describes the constant at which any magnetic nucleus will precess in a 1 tesla magnet is known as _______.] Precessional ratio Magnetogyric ratio Gyromagnetic ratio Both B and C None . [Which of the following logical gradients is known as the frequency encoding gradient?] X gradient Y gradient Z gradient None . [In clinical MRI, permanent magnets can be produced to operate up to what field strength?] .3 tesla .5 tesla 1.0 tesla 1.5 tesla None . [The type of magnet that is produced by passing an electrical current through a conductor is known as a ________.] Permanent magnet Resistive magnet Electromagnet Both B and C None . [In a TI weighted image, tissues with short TI relaxation times produce what type of signal?] High Low Intermediate None of the above None . [In a TI weighted image, fat has a ______ TI relaxation time and therefore appears ______.] Long, Bright Long, Dark Short, Dark Short, Bright None . [Another name for a proton density weighted image is ______.] Spin density Intermediate Inversion recovery Both A and B None . [In a gradient echo pulse sequence, the use of a gradient to eliminate residual transverse magnetization is known as ______.] Digital RF spoiling Frequency spoiling Gradient spoiling None of the above None . Time's up
