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On this page
  • Visium data analysis pipeline
  • Performing tasks in the Analyses tab
  • Filter Features
  • Normalization
  • Exploratory analysis
  • Automatic classification
  • Publish cell attributes to project
  • Modify cell attribute
  • Additional Assistance

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  1. Partek Flow
  2. Tutorials
  3. 10x Genomics Visium Spatial Data Analysis

Spatial data analysis steps

PreviousStart with 10x Genomics Visium fastq filesNextView tissue images

Last updated 7 months ago

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Here we are .

Visium data analysis pipeline

A basic example of a spatial data analysis, starting from the Single cell counts node, is shown below and is similar to with the addition of the Spatial report task (shown) or Annotate Visium image task (not shown).

Performing tasks in the Analyses tab

A context-sensitive menu will appear on the right side of the pipeline. Use the drop-downs in the toolbox to open available tasks for the selected data node.

Filter Features

Remove gene expression counts that are not relevant to the analysis.

  • Click the Filtering drop-down in the toolbox

  • Click the Filter Features task

  • Choose Noise reduction

  • Exclude features where value <= 0.0 in at least 99.0% of the cells

  • Click Finish

Remove gene expression values that are zero in the majority of the cells.

A task node, Filtered counts, is produced. Initially, the node will be semi-transparent to indicate that it has been queued, but not completed. A progress bar will appear on the Filter features task node to indicate that the task is running.

Normalization

Normalize (transform) the cells to account for variability between cells.

  • Select the Filtered Counts result node

  • Choose the Normalization task from the toolbox

  • Click Use recommended

  • Click Finish

Exploratory analysis

Explore the data by dimension reduction and clustering methods.

  • Click the Normalized counts result node

  • Select the PCA task under Exploratory analysis in the toolbox

  • Unselect Split by Sample

  • Click Finish

The PCA result node generated by the PCA task can be visualized by double-clicking the circular node.

  • Single click the PCA result node

  • Select the Graph-based clustering task from the toolbox

  • Click Finish

The results of graph-based clustering can be viewed by PCA, UMAP, or t-SNE. Follow the steps outlined below to generate a UMAP.

  • Select the Graph-based clustering result node by single click

  • Select the UMAP task from the toolbox

  • Click Finish

  • Double-click the UMAP result node

The UMAP is automatically colored by the graph-based clustering result in the previous node. To change the color, click Style.

Automatic classification

  • Click the Filtered counts node

  • From the Classification drop-down in the toolbox, select Classify cell type

  • Using the Managed classifiers, select the human Intestine Garnett classifier

  • Click Finish

The output of this task produces the Classify result node.

Double-click the Classify result node to view the cell count for each cell type and the top marker features for each cell type.

Publish cell attributes to project

Publish cell attributes to the project to make this attribute accessible for downstream applications.

  • Click the Classify result node

  • Select Publish cell attributes to project under Annotation/Metadata

  • Name the cell attribute

  • Click Finish

Publish cell attributes can be applied to result nodes with cell annotation (e.g. click the graph-based clustering result node and follow the same steps).

An example of this completed task is shown below.

Since this attribute has been published, we can choose to right-click the Publish cell attributes to project node and remove this from the pipeline. This attribute will be managed in the Metadata tab (discussed below).

Modify cell attribute

The name of the Cell attribute can be changed in the Metadata tab (right of the Analyses tab).

  • Click Manage

  • Click the Action dots

  • Choose Modify attribute

  • Rename the attribute Cell Type

  • Click Save

  • Click Back to metadata tab

Drag and drop the categories to rearrange the order of these categories, The order here will determine the plotted order and legend in visualizations.

We can use these Cell attributes in analyses tasks such as Statistics (e.g. differential analysis comparisons) as well as to Style the visualizations in the Data Viewer.

Additional Assistance

Note that QA/QC has not been performed in this example, to visualize all spots (points) on the tissue image. Single cell QA/QC can be performed from the Single cell counts node with the filtered cells applied to the Single cell counts before the Filter features task. .

Low-quality cells can be filtered out during the spatial data analysis using QA/QC and will not be viewed on the tissue image. . We will not perform Single cell QA/QC in this tutorial; this task would be invoked from the Single cell counts node and the Filter features task discussed below would be invoked from this output node (Filtered counts).

Classify the cells using to determine cell types.

Select cell_type from the drop-down and click the green Add button

If you need additional assistance, please visit to submit a help ticket or find phone numbers for regional support.

Click here for more information on Single cell QA/QC (see the pipeline in Figure 11)
Click here for more information on Single cell QA/QC
Garnett automatic classification
our support page
starting with Spacer Ranger outputs as the Single cell counts node
a Single cell RNA-Seq analysis pipeline
Visium data analysis pipeline
Performing tasks in the Analyses tab
Filter Features
Normalization
Exploratory analysis
Automatic classification
Publish cell attributes to project
Modify cell attribute