(MR) MR Strain mapping [Draft]

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(MR) MR Strain mapping [Draft]#

Imaging method

Folder name

File name suffix

Image volume

JSON fields

MRI: Strain Eigenvalues

mr-quant

strain

5D (x,y,z,t,ev_order)

FourthDimension: “TriggerTime”
TriggerTime [array, ms]
FifthDimension: “EigenOrder”

MRI: Strain Eigenvectors

mr-quant

strain-vec

6D (x,y,z,t,ev_order,vector_component)

FourthDimension: “TriggerTime”
TriggerTime [array, ms]
FifthDimension: “EigenOrder”
SixthDimension: “VectorComponent”

MRI: Strain Rate Eigenvalues

mr-quant

strain-rate

5D (x,y,z,t,ev_order)

FourthDimension: “TriggerTime”
TriggerTime [array, ms]
FifthDimension: “EigenOrder”

MRI: Strain Rate Eigenvectors

mr-quant

strain-rate-vec

6D (x,y,z,t,ev_order,vector_component)

FourthDimension: “TriggerTime”
TriggerTime [array, ms]
FifthDimension: “EigenOrder”
SixthDimension: “VectorComponent”

Notes#

  1. The EigenOrder (indicated as ev_order in the dimensions description above) corresponds to the following:

    • First Eigenvalue/Eigenvector: Largest positive Eigenvalue.

    • Second Eigenvalue/Eigenvector: Largest negative Eigenvalue.

    • Third Eigenvalue/Eigenvector: Remaining Eigenvalue.

  2. The vector components are expressed in the same reference system as the volume.

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