Welcome to your MRI - A Name [When slice thickness is increased, signal to noise ratio _______.] Increases Decreases Stays the same None . [When field of view is increased, signal to noise ratio _______.] Increases Decreases Stays the same None . [The artifact produced by the transfer of spin lattice energy from one slice to its adjacent slice is known as ______.] Wraparound artifact Ringing artifact Cross talk artifact Magnetic susceptibility None . [In biological tissue, which type of relaxation occurs the quickest?] T2 relaxation T2* relaxation TI relaxation None of the above None . [Which of the following is a method of eliminating residual transverse magnetization?] Digital RF spoiling Gradient rewinding Gradient spoiling Both A and C None . [The process during prescan that fine tunes the resonant frequency is known as _____.] Center frequency adjustment Transmit gain adjustment Receive attenuation adjustment Impedance matching None . [At a field strength of 1.0 tesla, the approximate Tl relaxation time for water is ______.] 800ms 1000 ms 2000 ms 2500ms None . [Prior to each scan, the process of prescanning performs which type of calibration?] Adjusts the transmit gain Adjusts the receive attenuation Sets the center frequency All of the above None . [When image matrix is decreased, spacial resolution _______.] Increases Decreases Stays the same None . [Which area outside the blood brain barrier shows normal enhancement with the injection of gadolinium?] Choroid plexus Pineal gland Pituitary gland All of the above None . [The effects of time of flight and entry slice phenomena can be minimized by which method?] Gradient moment nulling Pre-saturation RF pulse Respiratory compensation None of the above None . [In a gradient echo pulse sequence, the process of reversing the slope of the phase encoding gradient after readout to preserve residual transverse magnetization is known as ______. ] Warping Spoiling Rewinding None of the above None . [In a T2 weighted image, a long TE is used to ______.] Maximize T2 effects Minimize T2 effects Maximize TI effects Minimize TI effects None . [In a gradient echo pulse sequence, the process of eliminating residual transverse magnetization is known as ______.] Warping Spoiling Rewinding None of the above None . [The magnetic field that surrounds the Earth has what field strength?] .5 tesla .6 tesla .5 gauss 1.5 tesla None . [During the acquisition of axial images of the body with the frequency direction L/R, phase encoding is performed by which physical gradient?] X gradient Y gradient Z gradient None of the above None . [Another name for a proton density weighted image is ______.] Spin density Intermediate Inversion recovery Both A and B None . [As slice thickness decreases, the effects of time of flight phenomenon] Increase Decrease Stay the same None . [Blood flow that travels in the same direction in which the slices are acquired is known as what type of flow?] Counter current flow Vortex flow Stagnant flow Co-current flow None . [Coils that are used to transmit and receive radio frequencies are known as _______.] RF coils Shim coils Gradient coils Surface coils None . Time's up
