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The basic idea of MR

The basic idea of MR

Schematic showing hydrogen nuclei aligning with a strong magnetic field, precessing, then being excited by an RF pulse and emitting an RF signal during relaxation An MR scanner mainly detects hydrogen nuclei, which are single protons found in water and fat inside the body. A very strong superconducting magnet produces a magnetic flux density BBB that makes many of these protons align with their spins parallel to the field.

Magnetic resonance (MR) scanner (A-level only) Lesson

  1. A Level
  2. /Physics
  3. /Magnetic resonance (MR) scanner (A-level only)

Step-by-step lessons on AQA A Level Physics Magnetic resonance (MR) scanner (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons