In Trends page, the trend chart shows the deviation of the measurement data relative to the expected values as determined by the reference measurement. The expected values correspond to the zero line in the chart. The actual values of the reference measurement are not included as data points in the chart.
Trend Chart Navigation
Trends can only be viewed for one machine at a time. The user selects which parameters should be displayed in the trend chart in the filters on the left side of the page. The selection follows the hierarchy of the parameters from top to bottom:
Machine/Task
- A dropdown list of all registered machines.
- A dropdown list of all tasks for the selected machine. By default the last measured task is displayed.
Beams
All beams assigned to the selected task are listed. Toggle the checkboxes to display (selected) or hide (unselected) a beam. Different beams are visualized by different colors in the chart (1).
Parameters
Check mark the boxes of the parameters of which the trends will be displayed. The different parameters are displayed with different symbols (2).
Trend Chart Display
The chart shows deviation in percentage. The axes for the deviation of Center inline/crossline and Field Width inline/crossline in mm is on the left side of the chart. The axes for the deviation of Symmetry inline/ crossline, Flatness, Dose Output, and Energy Factor in percent is on the right.
The actual values of a data point can be viewed via a tooltip directly in the chart. If the reference dose (see Section 7.1.4.3) is available, the dose in cGy is also displayed (see left figure below).
Date filter
By default, the trends are displayed for a period of the last 30 days. Other different lengths of periods can
be also selected with the Date filter dropdown menu.
Tolerance display
In this dropdown menu, the tolerance of a beam / parameter can be selected to be displayed as a green
area around the trend curve.
Zooming and panning
The chart allows zooming and panning.
Hiding / displaying curves
Individual curves in the chart can be hidden / displayed by clicking on the chart legend. They can be removed/added to the chart by selecting or deselecting beams and parameters in the filters on the left side of the page.
Download image command
The current displayed trend chart is saved as a *.png file.
Export chart data command
The data of the currently displayed trend chart is saved as a *.csv file.
Note: Downloading images with an iPad is not yet available.
Accessing Previous Task Executions
In the Test Run page, only the task executions on the current date can be accessed. The tasks executed on
previous day can be viewed in the Trends page:
- In the Trends page, select the LINACs and beams in the navigation.
On the trend chart, click on a data point of the date of interest. The detailed results of the selected beams will be displayed below the chart.
Viewing a selected executed task (examples, with (left) and without (right) secondary approval (1)) - In the task information on the left, click the View icon; the Test Run – Summary page will open displaying the detailed task executions of the selected task and date.