MRI – B 30 Dec Welcome to your MRI - B Professional Name: Email: Contact #: [The MRA sequence that is sensitive to flow direction is:] 3D phase contrast MRA (PC MRA) 3D time of flight (TOF) 2D TOF Multislice vascular None . [Gadolinium contrast media (gadolinium) provides images whereby enhancing structures (e.g. vessels or lesions) appear ______ on T1-weighted images.] Hyperintense Hypointense Isointense Dark None . [The swirling blood flow that occurs just past the area of a stenosis is known as:] Laminar flow Accelerated flow Vortex flow Turbulent flow None . [On Figure the tissue indicated by arrow L is made up primarily of:] White matter Gray matter Cerebrospinal fluid (CSF) Bone None Comment . [On Figure arrow A is pointing to the:] Anterior (frontal) horn of the lateral ventricle Posterior (occipital) horn of the lateral ventricle Third ventricle Fourth ventricle None Comment . [On Figure arrow F is pointing to the:] Symphysis pubis Pubic bone Obturator internus muscle Gluteal muscles None Comment . [The technique by which signal data is transformed from a plot of signal intensity over time to a plot of signal intensity over frequency is known as:] Fourier transformation Chemical shift Parts per million Volume rendering None . [Which of the following lab tests can be used as an indicator of dehydration?] BUN PTT (partial thromboplastin time) Serum potassium Hematocrit None . [On Figure arrow D is pointing to the:] Uterus Fundus Myometrium Junctional zone Endometrium None Comment . [Which of the following blood tests would NOT be used to assess the patient’s risk of hemorrhaging during an invasive procedure (such as a biopsy)?] Prothrombin time (PT) Hematocrit International normalized ratio (INR) Platelet count None . [Figure was acquired in the:] Axial imaging plane Sagittal imaging plane Coronal imaging plane Off-axis (oblique) imaging plane None Comment . [SNR is a factor that is measured.] True False None . [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 . [Figure shows images during various phases of contrast enhancement. Hemangiomas are “benign” lesions (typically watch and wait lesions) that are venous fed, and therefore are visualized on:] First-pass images Second-pass images Delayed images All phases None Comment . [On Figure arrow D is pointing to the:] Gastrocnemius muscle Achilles tendon Tibio-talar joint Talus Navicular None Comment . [CNR is a factor that is measured.] True False None . [The components that make up the circle of Willis include the:] Hypothalamus, hyperthalamus, and right and left thalamus Caudate nucleus, lentiform nucleus, and thalamus (right and left) Pons, medulla, and midbrain (cerebral peduncles) Anterior cerebral arteries (right and left), posterior cerebral arteries (right and left), anterior communicating artery, and posterior communicating arteries (right and left) None . [Figure is displayed whereby the “top” of the image represents the _____ aspect of the elbow joint.] Anterior Posterior Superior Inferior Right None Comment . [For patients with hearing loss, each of the following would be helpful for effective communication EXCEPT:] Avoid noisy backgrounds Speak loudly in a high pitch Face the patient as you speak to him/her Rephrase what you said as necessary None . [The intrinsic contrast mechanism with regard to fMRI is:] Faraday’s law of induction Chemical shift Flow-related enhancement The BOLD effect None . Time's up
