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TOOLS
» Time Constants

An understanding of time constants allows easier understanding of MRI signal equations. This tool allows you to build up the equations describing the change of magnetisation in basic pulse sequences.

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Time Constant Tool: Mz = 1 - exp(-t/800)

Longitudinal recovery with T1 = 800 ms.

1_exp_t800

Navigate below and increase T1 to 1500 ms: 1 - exp (-t/1500).

Navigate through the tool...
  1. 1 - exp (-t/100)
  2. 1 - exp (-t/400)
  3. 1 - exp (-t/800)
  4. 1 - exp (-t/1500)
  5. 1 - exp (-t/2500)

Other sections of this tool:

Remember, T1, T2 and T2* are time constants.

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(This page: http://www.revisemri.com/tools/timeconst/1_exp_t800)