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myQA Daily - Setting up for Measurements

  • Updated

Device Connection

A cable connection is not required for a standard measurement setup using the myQA Daily. The myQA Daily device may be powered by the provided battery and the data communication may use a wireless local area network (WiFi, WLAN).

Overview of myQA Daily measurement system - device connection.

In this chapter, only communication between the device and network (1) is described. Communication (2 or 3) between the PC / mobile / Server are your local area network are normal communication. myQA Daily users communicate with the myQA Daily SW installed on a Server or PC through the user interface of a webbrowser on a PC or mobile (4). Data flow: The measurement data in the myQA Daily device is transmitted to the myQA Daily SW (5).

Optionally, the data communication also can be via Ethernet connection. It is a wired communication and the devices are connected with Ethernet cables. Ethernet refers to the family of local area network (LAN) products covered by the IEEE 802.3 standard. The myQA Daily device supports the data transfer rate up to 1 GBit/s.

 

Network Configurations

The myQA Daily device has a web-interface where the network settings can be configured, stored, and uploaded; and the firmware (FW) can be updated. Section 5.2.1 gives the instruction to open the web interface. It is suggested to use a PC with a web browser.

Logging in to myQA Daily Configuration WebInterface

Default device hostname of myQA Daily device

By default, the hostname of myQA Daily device is “myqadaily-[S/N]”. The device serial number (S/N) is a 5-digit number and can be found on the device information label on bottom of the device. This label also contains two URLs for initial configuration http://169.254.22.11/ or http://myqadaily-[S/N].local/ (where, [S/N] should be replaced with the device serial number).

Note: If the device is connected to a network without a DHCP-Server, no static IP-Address is configured. A link-local address (LLADR) from the 169.254.xx.yy Pool is used (Subnetmask 255.255.0.0). The first address that is tried is 169.254.22.11.

 

Log in to the myQA Daily configuration web-interface

  • Connect the device to the PC with an Ethernet cable.

    Illustration of direct connection between the myQA Daily device and a PC

  • Switch the device on and wait until the power button LED lights green.
  • Press briefly (< 1 s) the Config button on the device (Section 4.2). The Activity LED starts to blink.

  • There are three options to open configuration web interface:
    a. via URL http://myqadaily-[s/n].local/ ([s/n] to be replaced by the device serial number)
    b. via URL http://169.254.22.11/ (valid if the device is connected to the PC with a direct cable connection or Sif no DHCP server exists on the local network)
    c. via Windows Explorer
    o Click to expand the Network browser, and then look for the device hostname.
    o Double-click the device name.

    myQA Daily device name in the Network node in Windows Explorer

    Note: If the device name cannot be found, check whether the Windows Network Discovery is enabled.

    The myQA Daily device configuration web-interface opens:

    myQA Daily device configuration web-interface - Login dialog

  • Enter username, “admin”, password, (default: “Pa$$word1”), and click LOGIN. The Device Info page
    opens.

    IMPORTANT NOTICE
    For security reasons, it is strongly recommended to change the admin password after initial login.

    myQA Daily device configuration web-interface - Device Info page (example)

  • Device information (Hostname (or device name), Friendly Name, and Password) can be changed on the right side of the page. Click the Apply or the Change button after entering the new information.

    Note: If the hostname is changed, the new hostname is taken into account only after restarting the device (powered off and back powered on).

  • Click the Navigation icon in the upper-left corner to expand the Navigation panel:

    myQA Daily device configuration web-interface - Navigation panel

    Different pages can be accessed by clicking the page name on the Navigation panel for different configuration tasks. The item, Licenses, is about open source licenses and described in Section 12.3.

 

Configuration of Wireless Communication

  • Click Configure Wireless in the Navigation panel on the left to open the page.

    myQA Daily device configuration web-interface - Configure Wireless page (example)
  • Section Available WLANs lists the WLANs in the range of the device. Select the WLAN to be used.
  • Enter the authentication information for the WLAN in the Connect section, and click the Connect button.
  • In section WLAN IPv4 respectively WLAN IPv6, the current WLAN IP settings and the connection status are displayed.
  • In the Set configuration group, select the DHCP or STATIC round button for the IP address configuration.
  • Section Set Configuration allows selecting DHCP (selected by default) or static IP configuration. If the configuration was changed, click Save.

 

Configuration of Wired Communication

  • Click Configure Ethernet (wired) in the Navigation panel on the left to open the page.

    myQA Daily device configuration web-interface - Configure Ethernet (wired) page (example)
  • Section Ethernet IPv4 respectively Ethernet IPv6 shows the current Ethernet IP settings.
  • Section Set Configuration allows selecting DHCP (selected by default) or static IP configuration.
  • If the configuration was changed, click on Save.

 

Reset, Backup, or Restore Configuration

  • Click Configuration in the Navigation panel.

    myQA Daily device configuration web-interface - Configuration page

 

System Configuration

  • Click the Reset button to reset the device to the default settings.

Backup Configuration

  • Click the Download configuration files button and then give a file name to the configuration and select a desired location and save the file.

Restore configuration

  • Click the Select File button and then browse and select the saved configuration file to be restored. Then click Restore configuration to restore the configuration.

 

Update Firmware

It is recommended always installing the latest firmware versions on IBA measurement devices as in general they improve the overall reliability, measurement accuracy, and IT security of the measurement system. If there is a new version of FW available for the myQA Daily device, you will receive a ticket via an email sent by IBA Dosimetry Service.

  • Download the latest version of firmware via IBA Service Portal: https://iba-portal.com/ (see the ticket received for the exact link).

  • Click System Update in the Navigation panel.

    myQA Daily device configuration web-interface - System Update page
  • Click the Select File button, then browse and select the new FW file. Click Start Update to start the update process. The update can take up to five minutes and the device will restart afterwards.

 

Download Logs

  • Click Download logs in the Navigation pane.

  • Click the Download button for the desired log files and save it in a desired location for further
    investigation.

    myQA Daily device configuration web-interface - Download logs page

 

Network Connection Troubleshooting

Table 5.1. myQA Daily network connection troubleshooting

ProblemPossible reason Solution
Device cannot be found / is not communicating
if connected directly or via local network.		IP / subnet mask is not entered correctly.

Ping device.

Check IP / subnet settings.

Device and computer are on different networks / network segments. Check gateway settings.

Ethernet cable / pins broken or defect.

Network socket defect.

Network (cable) defect or not conform to CAT-6.

Wrong or defect shielding of network cable (grounding).

Ethernet hub / switch defect.
 

Perform crosscheck with another Ethernet cable / port.

Test if direct connection to computer is working.

Check if pins on Ethernet port / socket are not bent / broken.

Carry out troubleshooting of network cable connection and conditions. If available, use a LAN-test device.

Ethernet port blocked by other
application.		Check if Ethernet port is available.
Ethernet port could be deactivated if
battery powered laptop. 		Check power administration.
Firewall active and blocks
communication.		Deactivate firewall on computer.
Laptop may have WiFi/WLAN interface. Check if Ethernet port is available.
IP address of the device lost.Someone has changed IP address without notification.

The device announces its IP address in the Windows Network Overview when the Config Button is pressed for 1 second.

If the device is connected directly and is set to auto-configuration, it should have an IP address in the 169.254.XXX.YYY subnet.

Alternatively, press the Config button 10 seconds to return to factory settings.
 

 

Preparing myQA Daily Device for Measurements

The detectors of the myQA Daily device are ion chambers, a certain dose of pre-irradiation before the chamber response reaches a stable level is needed. Background level is measured and compensated via software automatically.

 

Setting up the Device under a LINAC

Note: If the myQA Daily device will be used with a Rotating Holder, please refer to the Rotating Holder User's Guide for installation instructions.

  • Place the device on the treatment couch under the treatment head such that the device electronics faces away from the LINAC gun and is not within the irradiated area.

    myQA Daily device under a LINAC and illustration of dose curve coordinates. 1: Chamber area, 2:
    Electronics, 3: Inline line, 4: Cross line, 5: Gun, 6: Target

  • Position the device in the center of the beam. Then align the effective point of measurement as indicated by the markings on the sides of the device to the isocenter. Use the room-lasers (1), if available.

    Side-markers on the device myQA Daily
  • Turn on the light field and check the size of the light field with respect to the print on the top surface of the device. The print is scaled for a source-axis distance (radiation source to isocenter) of 1000 mm.
  • At the LINAC console, choose the first field to be irradiated.

 

Device Warm-up and Pre-Irradiation

Warm-up

The myQA Daily device does not need to be warmed-up to reach its specified measurement accuracy.

Pre-irradiation

Ionization chambers need a minimal amount of pre-irradiation to reach a stable response and their maximum measurement accuracy.

When using the myQA Daily device with radiation fields of less than 100 MU and less than 1 Gy dose to the ionization chamber array, a minimum amount of pre-irradiation of 0.25 Gy (field size: 25 cm × 25 cm).

If the dose of the irradiation is higher than or equal to 100 MU and the dose to the ionization chamber array is higher than or equal to 1 Gy, no pre-irradiation is necessary.

For simplifying the procedure, it is recommended to pre-irradiate with at least 500 MU during the LINAC's warm up phase in the morning.

 

Background Measurement

The device automatically performs background measurements every 20 seconds to compensate for ionization chamber leakage while no irradiation is taking place.

 

Shutdown Procedure

  • Ensure that no active task is being run in the myQA Daily web application.
  • Press the power button on the myQA Daily device to turn off the power.
  • If powered by an external power supply, disconnect the external power supply once the LED ring surrounding the button is no longer lit.
  • Log out of the myQA Daily application.