v
_{
1
}
^{ST}, v
_{
2
}
^{ST,}
v
_{
3
}
^{ST}

the vector of the most, intermediate and least extended orthogonal directions of FLASH signal, determined by structuretensor analysis.

λ_{1}
^{ST}

eigenvalue (λ) with the subscript indicating the eigenvalue number.

α'v
_{
1
}
^{ST} and α'e
_{
1
}
^{DTI}

vector helix angle, used for quantification of the putative myocyte orientation. The vector quantified is identified after α’. The angle is defined in Figure 2.

α''v
_{
1
}
^{ST} and α''e
_{
1
}
^{DTI}

vector transverse angle, used for quantification of the putative myocyte orientation.

β'v
_{
3
}
^{ST} and β'e
_{
3
}
^{DTI}

vector elevation angle, used for quantification of the putative sheetlet/sheetletnormal orientation.

β”v
_{
3
}
^{ST} and β''e
_{
3
}
^{DTI}

vector transverse angle, used for quantification of the putative sheetlet/sheetletnormal orientation.

m

the true myocyte orientation vector.

s

the true sheetlet (inplane) vector.

n

the true sheetlet normal vector. The superscript FI is used in the case of n measured by FLASH/FI.
