Topic Index

Study MRI physics using interactive questions and answers. Choose a topic.

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Topic Index - p

• pacemakers
  • upper B₀ exposure limits
  • contraindication to MRI
  • accidental deaths
• parallel and antiparallel
  • alignment of spins
• parallel imaging (e.g. SENSE, SMASH)
  • multi coil array
  • missing k-space lines
• partial Fourier
  • k-space tool
• passive shielding, see shielding
• passive shimming, see shimming
• peripheral nerve stimulation
  • risks and threshold
• permanent magnet
  • vs. other types, pros / cons
• phase cancellation artefact
  • about black boundary artefact
• phase encoding
  • phase differences
  • rate of change of phase
  • vs. frequency encoding, temporal comparison
  • increasing number of steps, SNR effect
  • motion artefact
  • truncation artefact and
  • FOV reduction
  • gradient timing (i)
  • gradient timing (ii)
• phase oversampling
  • k-space tool
• phase resolution, see scan percentage
• physicist, MRI
  • responsibilities and role
• pixel size, see voxel size
• polarisation
  • of spins
• population differences (observable)
  • QM description of longitudinal magnetisation
  • small MRI signal
• precession
  • response to magnetic field
• pregnancy
  • precautions
  • staff
  • emergency e.g. cord compression
• profile order
  • linear, centric, low-high etc.
• proton density weighting
  • how to achieve
• pulse sequence diagram
  • simplest possible
  • spin echo
  • gradient echo
  • STIR and FLAIR

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