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CAMRT-MRI IN PRACTICE CHAPTER 8 ARTIFACTS EXAM 2025 QUESTIONS AND ANSWERS
CAMRT-MRI IN PRACTICE CHAPTER 8 ARTIFACTS EXAM 2025 QUESTIONS AND ANSWERS
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CAMRT
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CAMRT
CAMRT-MRI IN PRACTICE CHAPTER 8 ARTIFACTS EXAM 2025 QUESTIONS AND ANSWERS
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| Uploaded on: | September 7, 2025 |
| Last updated: | September 7, 2025 |
| Number of pages: | 21 |
| Written in: | 2025/2026 |
| Type: | Exam (elaborations) |
| Contains: | Questions & Answers |
| Tags: | CAMRT-MRI IN PRACTICE CHAPTER 8 ARTIFACTS EXAM 2025 QUESTIONS AND ANSWERS |
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CAMRT-MRI IN PRACTICE CHAPTER 8 ARTIFACTS EXAM 2025 QUESTIONS AND ANSWERS Phase mismapping: Appearance - ....ANSWER ...-AKA ghosting. produces replications of moving anatomy across the image in the phase direction. Usually occurs from anatomy that moves periodically (respirations, blood flow, swallowing, eye movement). Is phase mismapping/ghosting more or less apparent further from the source? ....ANSWER ...-Less apparent. What is the calculation for separation between ghosts? - ....ANSWER ...-S(p)= scan time (TR, phase matrix, NEX) divided by the period of motion of the moving object. How to prevent phase mimsmapping - ....ANSWER ...-presat pulses placed over the area creating motion, or outside the FOV. Swapping the frequency and phase axis to move the artifact. ...©️ 2025, ALL RIGHTS RESERVED 1
