Coils are used to produce different magnetic field strengths at different locations. What is the rate at which the field strength changes with changing position? Describe chemical shift artifact Describe magnetic susceptibility artifact Describe pulsation artifact Describe wraparound artifac How are MRAs and MRVs created? How are different tissues distinguished by MRI? How are these gradients used? How can one calculate how long a sequence will take? How is signal intensity related to TR and TE in a spin-echo sequence? In MRI, does T1 have units of millimeters, grayscale value, milliseconds, tesla, or rotations per second? In a spin-echo sequence, is the 180 degree pulse applied in the transverse or longitudinal plane? On T1-weighted imaging, which tissues are high signal (i.e., bright) On T1-weighted imaging, which tissues are low-signal (i.e., dark) On T2-weighted imaging, which tissues are high signal (i.e., bright? On T2-weighted imaging, which tissues are low signal (i.e., dark)? What are FLAIR and STIR sequences? What are T1 and T2 weighting? What are T1 and T2? What are averages? What characteristics of the MRI pulse sequence help to identify certain sequences as Proton density weighted? What characteristics of the MRI pulse sequence help to identify certain sequences as T1 weighted? What characteristics of the MRI pulse sequence help to identify certain sequences as T2 weighted? What characterizes a good image? What happens to the signal intensity when the TE is increased? What happens to the signal intensity when the TR is increased? What is a gradient-echo sequence? What is a spin-echo sequence? What is a tesla? What is an MRI sequence? What is proton density weighting? What is the TE? What is the TR? What is the principle behind MRI? What term is used to describe the pixel values on MRI? Book traversal links for MRI ‹ Why is such a high resolution required for mammography? Up Coils are used to produce different magnetic field strengths at different locations. What is the rate at which the field strength changes with changing position? ›