Aliasing (Wraparound) Artifact and Parallel Imaging in MRI | MRI Physics Course #13

Pass your radiology physics exam first time. Complete radiology physics past paper question bank 👇 https://learnradiologyphysics.com/ ========================= We've seen how selecting a specific bandwidth and field of view size determines the gradient field strength (in the frequency encoding direction) and delta k in the phase encoding direction. These field strengths determine the frequency changes in both the x and y axes. Let's look at what happens if tissue extends beyond the predetermined FOV and we are unable to accurately sample these signals. This misrepresentation of the sampled signals will lead to an artifact known as aliasing or wraparound artifact. Here we review what aliasing is, why it happens and what we can do to reduce or prevent it occurring. ========================= Not sure these radiology physics question banks are for you? If you’re preparing for a radiology physics exam and feeling overwhelmed by formulas, theory, or endless reading, you’re not alone. Most candidates don’t fail because they didn’t study enough, but because they didn’t practise the right way. The fastest way to build confidence in radiology physics is simple: 👉 Do high-quality past-paper style questions. Instead of passively reading notes, you’ll practise the way the exams actually test you. With carefully written questions that reflect real exam structure, difficulty, and marking logic. Why question banks work for radiology physics exams Radiology physics isn’t about memorising every fact. It’s about recognising patterns, understanding how concepts are tested, and applying physics under exam pressure. These question banks help you: Identify high-yield examinable topics Learn how questions are phrased across different exams and modalities Recognise common exam traps and misconceptions Reinforce understanding through repetition and explanation Build the confidence that comes from knowing you’ve seen this before Every question is written with exam relevance in mind, aligned to major international curricula, and structured to mirror real-world past papers, not generic AI generated physics quizzes. Who these radiology physics question banks are for These are ideal if you: Are short on time and want maximum exam return Feel confident reading theory but struggle with exam questions Want a structured way to revise X-ray, CT, MRI, ultrasound, and nuclear medicine physics Are preparing for FRCR, RANZCR AIT, ARRT, ABR Core, MICR Part 1, or FC Rad Diag (SA) or similar exams in the Radiography and Veterinary fields. If you’ve ever thought “I understand this topic… but I’m not sure I could answer it in an exam”, this is exactly the gap these question banks are built to close. Radiology physics exams reward practice, familiarity, and confidence. And confidence comes from doing focused, exam specific practice over and over again. Happy studying, Michael #radiology #radres #FOAMrad #FOAMed