Component levels report

Kent Johnson

2022-01-03

The component levels report analyzes unmixed, multiplex images to help evaluate staining and unmixing quality. This report shows the relative strength of each component and crosstalk between components.

Data requirements

The input to this report is an inForm export directory containing multiplex images which have been unmixed by inForm using a candidate spectral library.

Multiplex images are taken from slides stained with a multiple fluorophores and a counterstain. The export directory should contain component data files from one or more images in the experiment.

Detailed steps

Choose “Component levels report” from the RStudio Addins menu

This will open the component levels report app.

Select input files

Click the “Browse” button in the “Select Export directory” section of the GUI. Use the directory selection dialog to select the directory containing exported component data files.

Enter the quantiles of interest

The component levels report shows the pixel intensity of each fluor in each image. Selected quantiles are shown with black bars and exported in CSV files. Enter the fractions corresponding to the quantiles of interest. The default value, 0.99, will show the signal level that is greater than 99% of the pixels in each image. This is a reasonable measure of peak signal intensity.

Enter the desired quantiles in the text field. Multiple values can be entered, separated by comma or space.

Select export option

The component levels report includes “pairs plots” showing the expression levels of each component against each other component. These can help identify problematic crosstalk. Check the box “Export data from pairs plots” to have the report include text files containing the raw data for the plots.

Create report

Click “Create Report” to begin generating the report. The app will create an HTML file containing the analysis results and and two CSV files containing values from the report.