Use Ejection Fraction % when you need to compute ejection fraction as a percentage of end-diastolic volume. Enter Stroke volume and End-diastolic volume using the definitions and units below so the result can be reproduced.

Stroke volume

A finite measured or assumed value greater than or equal to 0, expressed in mL.

End-diastolic volume

A finite measured or assumed value greater than or equal to 5e-324, expressed in mL.

The published tool contract uses this rule: Compute ejection fraction as a percentage of end-diastolic volume.^[1]

Ejection fraction

The calculated ejection fraction in %.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Stroke volume and End-diastolic volume values and their units alongside the result. Gap Fraction % is useful when you instead need to compute canopy gap fraction as a percentage of sky-visible pixels over total hemispherical image pixels. S Phase Fraction provides another view by helping you compute the fraction of cells in S phase relative to the total counted cell population.

• Gap Fraction %

  Compute canopy gap fraction as a percentage of sky-visible pixels over total hemispherical image pixels.

• S Phase Fraction

  Compute the fraction of cells in S phase relative to the total counted cell population.

• Phase Mitotic Fraction

  Compute the fraction of cells positive for a specific mitotic phase marker.