Welcome to your MRI - A Name [On a proton density weighted image of the brain, white matter appears ______ to grey matter.] Hyperintense Hypointense Isointense None . [When image matrix increases, acquisition time _______.] Increases Decreases Stays the same None . [In which of the following types of flow can intra-voxel dephasing be compensated for?] Turbulent flow Vortex flow Stagnant flow Laminar flow None . [An image with a grainy appearance usually represents an image with _______.] High resolution Low signal t9 noise High signal to noise Low resolution None . [The negatively charged component of an atom is called the _______.] Electron Proton Negatron Neutron None . [The effect of MRI contrast media on tissue relaxation rates is known as_____.] Relaxation Relaxivity Realization None of the above None . [The height and width of a picture element is determined by what parameter(s)?] Size of the FOV Number of phase encoding steps Number of frequency encoding steps All of the above None . [On a TI weighted image of the brain, fat appears ______ to white matter.] Hyperintense Hypointense Isointense None . [The theorem that states that a frequency must be sampled at least twice in order to reproduce it reliably is known as the _______.] Pathagarum theorem Nyq~sttheorem Larmor theorem Fourier theorem None . [The calibration of transmit gain during the prescan process determines which factor?] RF output necessary to produce a 90 degree flip angle The exact resonant frequency The necessary amount of signal needed to create an image None of the above None . [Which of the following pathologies of the spine is an indication for the use of an MRI contrast agent?] Spinal cord infection Recurrent disc herniation Intramedullary neoplasm All of the above None . [As blood flow velocity increases, the effects of time of flight phenomenon] Increase Decrease Stay the same 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 type of cardiac gating that detects the increase in blood volume in the capillary bed during systole is known as ______.] ECG gating Pseudo gating Peripheral gating None of the above None . [During cardiac gating, TR is dependent upon which factor(s)?] The patient's heart rate The R- R interval The Q - R interval Both A and B None . [The device in the MRI system that supplies power to the RF transmitter coils is known as the _____.] Array processor RF amplifier Gradient amplifier None of the above None . [Blood flow that has high velocities in the center of the vessel but spirals near walls of a vessel due to a stricture is known as what type of flow?] Turbulent flow Laminar flow Vortex flow Stagnant flow None . [Neoplasms within the spinal cord are said to be located in which of the following locations?] Intramedullary Extramedullary Intradural Extradural None of the above None . [The size of the area being displayed on an MR image is known as _______.] Field of view Voxel size Pixel size None of the above None . [Figure displays which type of relaxation curve?] T 1 relaxation curve T2 relaxation curve Inversion recovery curve None Comment . Time's up
