After you double-click a study, the Lesion Tracking imaging application will be launched. The basic patient and study data is displayed in the Image Viewer.
There are two methods to switch studies and series inside each viewport:
#### Studies Panel
Studies Panel at the left side of the workspace allows you to change studies and series. Click **Studies** button to toggle Studies Panel. You can view images in two ways:
1. Double-click the desired series thumbnail.
2. Drag and drop the desired series thumbnail on the image viewer.
Quick Switch Tool in the top-middle of the workspace allows you to switch studies and series for the active image viewer easily. Selected series will be colored by the theme colors.
There are a couple of ways to change the window/level of the image:
1. Select **Levels Tool** and drag on the image with the left mouse button. Dragging up decreases the level and dragging left decreases the window width.
To view measurements and manipulate the lesions, click **Measurements** button at the top-right of the workspace. The Measurements table will be displayed at the right side of the workspace. To hide the Measurements the table, click Measurements button.
_Note:_ Measurements button is available if the study is associated with a timepoint.
6. To delete the lesion, click the lesion number in the Measurements table then click **Delete**. It will delete the lesion from the Measurements table and the image.
4. To resize the measurement, hover the mouse over the end points of the non-target then click and drag.
5. To rename the lesion, click the lesion number in the Measurements table then click **Rename**
6. To delete the lesion, click the lesion number in the Measurements table then click **Delete**. It will delete the lesion from the Measurements table and the image.
### View Lesion
To view the lesion on the image, click the measurement record in the Measurements table then the image which includes the lesion will be displayed by activating the selected lesion.
Any lesion that will conflict with Response Criteria for RECIST 1.1 will be flagged in the Measurements table. To view criteria non-conformities, click the icon at the left of the lesion record in the Measurements table.
1. Click **Save** button at the top-right of the workspace.
2. Click **Study list** to save changes and go back to Study List.
### Timepoint Comparison
LesionTracker allows to compare time points and manipulate the measurements on the timepoint images. To launch the compare mode:
1. Associate a study with Follow-up timepoint then double-click Follow-up study. Follow-up and Baseline studies will be displayed in 1x2 layout and Baseline study will show the image which includes the first target measurement as default.
2. Measurements in the Follow-up must be created in the same order as they were on Baseline.
To compare the lesions in Baseline and Follow-up, click the lesion record in the Measurements table. The recorded lesions will be displayed on the Baseline and Follow-up images
#### Stack Scroll Tool**
To scroll between two series synchronously, click More button and select **Stack Scroll Tool**.
Case Progress icon displays the progress of target and non-target lesions which are assessed out of total lesions. Number in the middle of the icon shows the number of lesions which are not assessed.
To have a quick view of the Measurements table, click **HUD** button at the top-right of the workspace. You can easily move and resize the HUD Panel on the workspace.
