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BPnd (Ichise MRTM2 Ref): Ichise MRTM with fixed k2'

MRTM can be turned into a more robust method called MRTM2 for pixel-wise applications with the same two-step approach applied in the SRTM2 model:

  1. Calculate in the model preprocessing step the clearance rate k2' of the reference TAC by the MRTM method with VOI data which has a limited level of noise.
  2. Fix k2': Use the estimated k2' value for the pixel-wise MRTM calculations, reducing the number of fitted parameters from 3 to 2.

If k'2 is fixed, the equation of MRTM reduces to the MRTM2 equation below

Equation MRTM2

with only two regression coefficients V/(V'b) and 1/b for T > t*. BP is calculated from the ratio of the two regression coefficients as

Equation MRTM2 2