VolumeFractionByLabelMsr
            Contains information related to the area or volume occupied by each object or region of a label image.
        
		Object members
| Measurement name | Description | Element type | Indexing | 
|---|---|---|---|
| volumeFraction | The proportion of pixels or voxels having the related label. | Floating point | [label, time] | 
| volume | The area or volume represented by the related label, expressed in world coordinates. | Floating point | [label, time] | 
| totalVolume | The area or volume of the mask image foreground, expressed in world coordinates. If no mask is provided, this measurement corresponds to the entire image. | Floating point | [label, time] | 
| voxelCount | The number of pixels or voxels having the related label. | Integer | [label, time] | 
| totalVoxelCount | The number of pixels or voxels contained in the mask image foreground. If no mask is provided, this measurement corresponds to the entire image. | Integer | [label, time] | 
| sliceIndex | The index of the related slice (for time series). | Unsigned integer | [label, time] | 
| label | The label associated with the input index. Generally, index 0 corresponds to label 1. | Unsigned integer | [label, time] |