Welcome to your MRI - B Professional Name: Email: Contact #: [Center frequency is a factor that determines the:] Frequency of RF used for excitation Frequency of RF used for signal detection a and b Amplitude and/or duration of the RF pulse (to determine flip angle) None . [The most common site(s) injured by technologists while caring for patients is(are) the:] Head Arms and shoulders Lumbosacral spine Lower leg None . [Destroying or altering medical records without legitimate authorization or reason is called:] Medical negligence Failure to follow standard of care Spoliation Vicarious liability None . [The gradient magnetic fields are:] Always on Superimposed over the main magnetic field Used for contrast control Controlled by RF pulses None . [Transmit gain is a factor that determines the:] Frequency of RF used for excitation Frequency of RF used for signal detection a and b Amplitude and/or duration of the RF pulse (to determine flip angle) None . [If CPR is not started within _____ of cardiac arrest, there will be brain damage due to lack of oxygen.] 1–3 minutes 4–6 minutes 7–10 minutes 15 minutes None . [For optimal imaging of the cervical spine, patient positioning and local coil placement are:] Supine/under the neck to include from C1 to C7 Supine/on top of the neck to include from C1 to C7 Supine/beside the neck to include from C1 to C7 Prone/on top of the neck to include from C1 to C7 None . [An inversion recovery (IR) spin echo sequence begins with a:] 90° RF pulse 180° RF pulse 45° RF pulse a or b None . [On Figure arrow B is pointing to the:] Tibia Fibula Talus Navicular Calcaneus None Comment . [On Figure arrow G is pointing to the:] Scaphoid (navicular) Lunate Triquetrium Pisiform Trapezium None Comment . [Gradient rise time is:] The time it takes for a gradient to get to full amplitude The time it takes for the cake to rise The time it takes for one TR to occur The time it takes for one acquisition to be complete None . [Geometric accuracy is determined by the:] RF system Shim system Gradient system Main magnet system None . [On Figure arrow D is pointing to the:] Olecranon process Ulna Brachioradialis muscles Trochlea None Comment . [On Figure arrow C is pointing to the:] Trapezium Trapezoid Capatate Hammate None Comment . [On Figure the SHORT AXIS views of the heart resemble images that are:] Axial to the plane of the heart muscle Sagittal to the plane of the heart muscle Coronal to the plane of the heart muscle Axial to the plane of the aorta None Comment . [During thermal equilibrium, the spin excesses of individual hydrogen nuclei add to form:] A rotating vector An oscillating vector A varying vector A net magnetization vector None . [When using MRA to evaluate extracranial vascular flow, such as that within carotid arteries, a recommended technique is:] 2D time of flight MRA 3D time of flight MRA 3D phase contrast MRA a and b None . [Increasing the flip angle yields images with:] More T1 information Less T1 information More T2 information Less T2 information None . [The signal intensity on TOF MRA sequences is related to:] Gadolinium Flow-related enhancement Velocity-induced phase shift Restricted diffusion None . [On Figure arrow E is pointing to the:] Oropharynx Nasopharynx Trachea Esophagus None Comment . Time's up
