Basic concepts of MRI physics for doctors

1. MRI Physics

2. Quantum Mechanics Davison, Germer and Born 1927 Heisenberg 1927 Schroedinger 1926 De Broglie 1925 Pauli 1924 Compton 1922 Bohr 1913 Einstein 1905 Planck 1901 Researcher Year

17. M is for Magnetic Incoherent magnetic moment of H is At different place in Precessional Path Coherent magnetic moment of H is Placed in the same place in Precessional Path

30. I is for Imaging Small transverse component of magnetization Large transverse component of magnetization Grey Black White Intermediate Low Signal High Signal

33. Contrast Mechanisms Small transverse component of magnetization Large transverse component of magnetization Grey Black White Intermediate Low Signal High Signal

35. Contrast Mechanisms ( Relaxation Process) 2-Nuclei loss Precessional coherence or dephase and NMV decay in the transverse plane this process called " T2 Decay " 1-NMV recovers and realign to B0 this process called " T1 Recovery "

43. Contrast Mechanisms ( T1 Recovery) inefficient at receiving energy T1 is longer i.e. nuclei take allot longer to dispose energy to surrounding water tissue WATER absorb energy quickly T1 is very short i.e. nuclei dispose their energy to surrounding fat tissue and return to B0 in very short time FAT T1 in Water T1 in Fat