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Open Annotator

If you received an email invitation, copy the link from the email into Google Chrome Browser to open the specific project.

Your first annotation

Click on a label to activate it. You will see a bar across the top of the image area showing the name and type of the active activation and also a button to inactivate it. All mouse/ trackpad functionalities work for that active label (instead of the usual scrolling or window/ level functionalities)

If the label is inactive, it can’t be drawn or modified. Colored tags show up on the bottom of the image showing the team member who created the annotation. You can also add a note to any individual annotation to indicate special details.

If the annotation uses a Global label, you’re done and ready to go to the next case.

If the annotation is Local, you would use your cursor to draw the appropriate annotation. When you are done, you can edit the annotations by grabbing and editing the entire shape, individual points, or the sides of a bounding box.

When the annotation is to your liking, you can either click Save or just go to the next Image in which case saving is automatic.

If you want to further edit the annotation, just click on its tag at the bottom of the image or use keyboard shortcuts to activate the label and edit it.

Brief Freeform Annotation Video

Mask Video

Mask annotation mode allows multiple shapes to be drawn on the same image. The drawing tool includes pencil width and shape as well as an eraser for corrections. Undo and Redo will remove/reinstate the last drawing or erasing action.

Image Manipulation

You can zoom, pan, and change the contrast and level using your mouse, trackpad, or with keyboard. Specific instructions are seen by clicking the mouse and keyboard icons in the Navigation column. There are buttons above the image to change the contrast and level values. You can use the preset buttons, keyboard shortcuts for CT scans, or select custom values with the window /level sliders.

Applying Multiple Labels

Applying different labels on the same image

Apply each label, one by one, and the bottom Annotations toolbar will indicate all the labels applied on that image.

Applying the same local label multiple times

Applying the same local label multiple times works the same way. Just click on the same label again to apply the label on the image again.

Remember that keyboard shortcuts are available to quickly apply a label.

Interpolation

Freeform shapes, polygons, lines, boxes

Interpolation Can be used for bounding boxes, shapes, and image level labels to automatically add labels on images between anchor frames.

  • Draw a box, freeform shape, polygon or line
  • Click Add Frame
  • Skip a few images and draw another annotation using the same label
  • Click Add Frame again
  • Repeat until you have as many frames as you like
  • Finally click Interpolate and the boxes/shapes/etc in between will be drawn as a smoothed average between the anchor frames

interpolate.gif

Global Image level labels

For global image level labels -

  • Label the first image where an entity is seen
  • Click Add Frame
  • Label the last image showing the entity
  • Click Add Frame again
  • Finally click Interpolate and all the images in between will be labeled automatically

If you make a mistake, you can use Label Controls to bulk remove.

interpolate-global.gif

Bulk Remove

If you have many labels that you would like to remove and possibly redraw. Use the Bulk Remove option.

  • Use Label Controls to select Select labels to BULK REMOVE associated annotations
  • Pick the scope for deletion, either image, series, or entire exam
  • Click the Bulk Remove button and the annotations will be deleted

Copy Annotations To Next Image

To copy an Active annotation quickly to the next image in an exam, use the Copy Annotation button in the toolbar above the image view.

You can add notes, radlex tags, review annotations and do much more with annotations. Check out the Labels page to know more details.

Note

Keyboard shortcuts are also available to help annotate faster and easier.