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Measurements for individual puncta

Measurement Definition
Image name Source file name, including subdirectory
puncta label Unique puncta ID; matches the pixel value in the puncta segmentation mask
ROI label ID of the ROI (cell or nucleus) the punctum belongs to; 0 corresponds to puncta located outside ROI
channel Channel name in which the punctum was segmented
x the x-coordinate (pixels) of the punctum within the image
y the y-coordinate (pixels) of the punctum within the image
z the z-coordinate (pixels) of the punctum within the image
puncta volume pix Volume (or area, for 2D images) of the punctum in pixels.
puncta volume um Volume of the punctum in µm3 (or area in µm2, for 2D images)
distance to ROI border um Distance in µm (in 3D) from the punctum’s center of mass to the border of the cell or nucleus; 0 corresponds to puncta located in the background
[FL] mean intensity per puncta Average pixel intensity of the [Fl] channel inside the punctum. Calculated for each fluorescent channel in the image
[FL] integrated intensity per puncta The sum of all pixel intensities of the [Fl] channel inside the punctum. Calculated for each fluorescent channel in the image
Pearson correlation coefficient [Fl] vs [Fl*] Pearson correlation coefficient between each pair of fluorescent channels [Fl] and [Fl*] inside the punctum
Pearson correlation p value [Fl] vs [Fl*] p-value for the Pearson correlation coefficient between each pair of fluorescent channels [Fl] and [Fl*] inside the punctum
Mutual information [Fl] vs [Fl*] Mutual information between each pair of fluorescent channels [Fl] and [Fl*] inside the punctum. This is a measure of correlation between channels

Measurements for individual ROI

Measurement Definition
Image name Source file name, including subdirectory
ROI label Unique ROI (cell or nucleus) ID; matches the pixel value in the ROI segmentation mask
x The x-coordinate (pixels) of the ROI within the image
y The y-coordinate (pixels) of the ROI within the image
z The z-coordinate (pixels) of the ROI within the image
ROI volume pix Volume (or area, for 2D images) of the ROI in pixels.
ROI volume um Volume of the ROI in µm3 (or area in µm2, for 2D images)
[Fl] mean intensity per ROI Average pixel intensity of the [Fl] channel inside the ROI. Calculated for each fluorescent channel in the image
[Fl] integrated intensity per ROI The sum of all pixel intensities of the [Fl] channel inside the ROI. Calculated for each fluorescent channel in the image
[Fl] mean background intensity Average pixel intensity of the [Fl] channel in the background (outsize of ROI); will have the same value for all ROI in the image
[Fl] integrated background intensity The sum of all pixel intensities of the [Fl] channel in the background (outsize of ROI); will have the same value for all ROI in the image
[Fl] entropy Entropy of the [Fl] channel inside the ROI
Pearson correlation coefficient [Fl] vs [Fl*] Pearson correlation coefficient between each pair of fluorescent channels [Fl] and [Fl*] inside the ROI
Pearson correlation p value [Fl] vs [Fl*] p-value for the Pearson correlation coefficient between each pair of fluorescent channels [Fl] and [Fl*] inside the ROI
Mutual information [Fl] vs [Fl*] Mutual information between each pair of fluorescent channels [Fl] and [Fl*] inside the ROI
number of [P] puncta Number of puncta detected in the [P] channel and assigned to the current ROI. This will correspond to the individual puncta measurements (Table above) with matching “Image name” and “cell label” values and “channel”=[P]. Calculated for each channel [P] specified as puncta channel
average [P] puncta volume pix per ROI Average volume in pixels of puncta detected from channel [P] in the current ROI
average [P] puncta volume um per ROI Average volume in µm3 (or area in µm2, for 2D images) of puncta detected from channel [P] in the current ROI
total [P] puncta volume pix per ROI Total volume in pixels of puncta detected from channel [P] in the current ROI
total [P] puncta volume um per ROI Total volume in µm3 (or area in µm2, for 2D images) of puncta detected from channel [P] in the current ROI
average [P] puncta distance to ROI border um per nucleus Average distance in µm (in 3D) from the puncta’s centers of mass to the ROI border
[Fl] mean intensity inside [P] puncta The average intensity of the [Fl] channel inside puncta detected in the [P] channel in the current ROI. For [Fl]=[P], this will correspond to the dense phase concentration
[Fl] mean intensity outside [P] puncta The average intensity of the [Fl] channel outside puncta detected in the [P] channel in the current ROI. For [Fl]=[P], this will correspond to the light phase concentration
[Fl] integrated intensity inside [P] puncta The sum of all intensities of the [Fl] channel inside puncta detected in the [P] channel in the current ROI.
[FL] integrated intensity outside [P] puncta The sum of all intensities of the [Fl] channel outside puncta detected in the [P] channel in the current ROI.
Overlap coefficient [P]_[P*]_coloc Overlap coefficient (overlap over union) for the current ROI for puncta masks detected from each pair of puncta channels [P] and [P*]. This is a measure of colocalization between puncta detected in different channels