Ch.12 MRI Artifacts Exam Questions With Correct Answers

Ch.12 MRI Artifacts Exam Questions With Correct Answers. ______ will eliminate the wraparound artifact from the top and bottom of a coronal knee image (assuming that the frequency encoding is accomplished with the z gradient, and using the coordinate axis convention above). 1. Increasing the FOV 2. Applying the no frequency wrap option 3. Applying a single saturation region - answer1,2, & 3 ______ would be most effective at reducing the artifact depicted in Fig 12-20 - answerECG triggering The frequency encoding direction in the image in Fig 12-20 is: - answerVertical Which of the following is NOT a method that may reduce motion artifacts? - answerApplying the no frequency wrap option If the frequency and phase directions were swapped, but all other parameters remained constant, and the scan was repeated, the flow artifacts n Fig 12-21 would: - answerExtend horizontally across the posterior aspect of the brain Which of the following strategies acts to reduce truncation artifacts? - answerApplying a raw data filter _______ artifacts are evident in the patient's left knee in Fig 12-22. - answerMetal The artifact in the conventional spin echo image in Fig 12-22 can be eliminated by: - answerRemoving the offending metal from the patient ______ pulse sequence display the effects of magnetic susceptibility - answerSpoiled gradient echo Which of the following is FALSE regarding a metal artifact in an MR image? - answerA metal artifact may appear as a scattering of RF energy, while all of the signal from the anatomical structures remains int