Charts

Charts of the currently filtered data can now be shown for CT and radiographic data. The user can configure which plots are shown using the Chart options on the CT and radiographic pages.

New in 0.7.0 Chart plotting options can also be configured by choosing the Chart options item on the User options menu at the top of the OpenREM homepage.

New in 0.7.0 Individual charts can be displayed full-screen by clicking on the Toggle fullscreen button that is positioned below each chart.

New in 0.7.0 The chart plotting status is displayed on the OpenREM homepage.

OpenREM CT chart sorting options screenshot

CT chart sorting options

New in 0.7.0 The data in many of the charts can now be sorted interactively by the user by clicking on one of the sorting options below the individual chart:

The user can set the default sorting type and direction by choosing the Chart options item from the User options menu on the OpenREM homepage.

The charts are automatically updated to reflect any filters that the user applies to the data.

Chart options

New in 0.7.0 Chart options can now be configured by choosing the Chart options item from the User options menu on the OpenREM homepage:

OpenREM chart options screenshot

They can also be set via the CT and Radiographic summary pages:

OpenREM CT chart options screenshot

The first option, Plot charts?, determines whether any plots are shown. This also controls whether the data for the plots is calculated by OpenREM. Some plot data is slow to calculate when there is a large amount of data: some users may prefer to leave Plot charts? off for performance reasons. Plot charts? can be switched on and activated with a click of the submit button after the data has been filtered.

The user can switch off all chart plotting by clicking on the Switch charts off link in the User options menu in the navigation bar at the top of any OpenREM page. Clicking on this link takes the user back to the home page.

A user’s chart options can also be configured by an administrator via OpenREM’s user administration page.

Chart types

The available charts for CT data are as follows:

  • Bar chart of mean DLP and CTDIvol for each acquisition protocol:

    OpenREM chart of mean DLP and CTDI\ :sub:`vol` screenshot

    The tooltip of each bar shows the user the name of the protocol, the number of acquisitions of that type and also the mean DLP and/or CTDIvol value.

    Clicking on an individual bar takes the user to a histogram of DLP or CTDIvol for that protocol. The tooltip for each histogram bar shows the number of acquisitions. The DLP histogram tooltip also includes a link that will take the user to the list of studies that contain the acquisitions represented by that histogram bar:

    OpenREM histogram of acquisition DLP screenshot
  • Pie chart of the frequency of each acquisition protocol. Clicking on a segment of the pie chart takes the user to the list of studies that contain the acquisitions in that segment.

    OpenREM chart of acquisition frequency screenshot
  • Bar chart of mean DLP for each study name. Clicking on a bar takes the user to a histogram of DLP for that study name. Clicking on a histogram bar tooltip link takes the user to the list of studies that correspond to the data represented by that bar.

    OpenREM chart of mean study DLP screenshot
  • Pie chart of the frequency of each study name. Clicking on a segment of the pie chart takes the user to the list of studies that correspond to the data in that segment.

  • New in 0.7.0 Bar chart of mean DLP for each requested procedure. Clicking on a bar takes the user to a histogram of DLP for that procedure. Clicking on a histogram bar tooltip link takes the user to the list of procedures that correspond to the data represented by that bar.

  • New in 0.7.0 Pie chart of the frequency of each requested procedure. Clicking on a segment of the pie chart takes the user to the list of procedures that correspond to the data in that segment.

  • Pie chart showing the number of studies carried on each day of the week:

    OpenREM pie chart of study workload per day of the week screenshot

    Clicking on a segment of the pie chart takes the user to a pie chart showing the studies for that weekday broken down per hour:

    OpenREM pie chart of study workload per hour in a day screenshot
  • Line chart showing the mean DLP of each study name over time. The time period per data point is chosen by the user in the Chart options. Note that selecting a short time period may result in long calculation times. The user can zoom in to the plot by clicking and dragging the mouse to select a date range. The user can also click on items in the chart legend to show or hide individual lines.

    OpenREM line chart of mean DLP per study type over time screenshot
  • New in 0.7.0 The user can choose whether the data displayed on the charts is the mean, the median or both by using the drop-down Average to use selection.

The available charts for radiographic data are as follows:

  • Bar chart of mean DAP for each acquisition protocol. Clicking on a bar takes the user to a histogram of DAP for that protocol. Clicking on the tooltip link of a histogram bar takes the user to the list of studies that contain the acquisitions in the histogram bar.
  • Pie chart of the frequency of each acquisition protocol. Clicking on a segment of the pie chart takes the user to the list of studies that contain the acquisitions in that segment.
  • Bar chart of mean kVp for each acquisition protocol. Clicking on a bar takes the user to a histogram of kVp for that protocol. Clicking on the tooltip link of a histogram bar takes the user to the list of studies that contain the acquisitions in the histogram bar.
  • Bar chart of mean mAs for each acquisition protocol. Clicking on a bar takes the user to a histogram of mAs for that protocol. Clicking on the tooltip link of a histogram bar takes the user to the list of studies that contain the acquisitions in the histogram bar.
  • Pie chart showing the number of studies carried out per weekday. Clicking on a segment of the pie chart takes the user to a pie chart showing the studies for that weekday broken down per hour.
  • Line chart showing how the mean DAP of each acquisition protocol varies over time. The time period per data point can be chosen by the user in the Chart options. Note that selecting a short time period may result in long calculation times. The user can zoom in to the plot by clicking and dragging the mouse to select a date range. The user can also click on items in the legend to show or hide individual lines.
  • New in 0.7.0 The user can choose whether the data displayed on the charts is the mean, the median or both by using the drop-down Average to use selection.

Exporting chart data

An image file of a chart can be saved using the menu in the top-right hand side of any of the charts. The same menu can be used to save the data used to plot a chart: the data can be downloaded in either csv or xls format.