ARRT Principles of MRI Final Exam Review Questions with 100% Correct Answers | Updated & Verified | 2024

3D gradient echo axial views can be used in cervical spine imaging to provide - Thin, contiguous sections of the spine, the ability to reformat into any other imaging plane, retrospectively, the ability to get either T1, spin density or T2* information by changing parameters. In complete spine imaging, to rule out metastatic lesions of the spinal cord, contrast enhancement can be used with T1 weighted images because - metastatic lesions enhance and normal cord does not Due to the differences in frequencies across the magnetic field we - use gradients, use sat bands, . use different coils To avoid the "magic angle" (an artifactual brightness seen in the medial segment of the posterior horn of the lateral meniscus when short TEs are used) artifact when imaging the knee, - use a longer TE, reposition the knee, orient the affected anatomy to another angle To best visualize the anterior cruciate ligament on knee MR - externally rotate the leg about 15 When using MRA to evaluate intracranial vascularity, flow within smaller vessels can best be demonstrated by - 3D time of flight MRA or 3D phase contrast MRA To produce the echo, a gradient echo pulse sequence uses -