General Application Workflows
This chapter provides short general workflows to get the devices setup and SW started quickly.
Additional information can be found in:
- Chapter 3 and Chapter 4 of this document
- myQA Platform Instructions for Use
- myQA Platform Reference Guide
- myQA Patients Instructions for Use
Install the myQA Software
- Right-click myQAFull.exe > Run as administrator.
- Follow the installation instructions.
- Activate license keys with the IBA License Manager (installed with myQAFull.exe)
- For data storage, the full SQL Server version is recommended
- For issues, please contact register@iba-group.com
- Allow myQA through Windows Defender Firewall:
Type “Allow an App through Windows Firewall” in the Windows search bar and click to open the Control Panel. - Check Domain, Private, and Public for the myQA Apps.
- Click OK.
Configure the MatriXX Resolution IP Address
- Connect the MatriXX Resolution via ethernet cable to your computer.
- Turn on the device and press the Config button.
- Type 169.254.22.11 into your web browser to open the MatriXX Resolution configuration page. username: admin, password: admin
- Click the Navigation panel (1) button to access the device information.
- Under Configure Ethernet [wired] choose DHCP or connect wirelessly by doing the following:
- Under Configure Wireless select the WLAN, enter the authentication information in the Connect section, and click Connect.
- Current WLAN IP settings and connection status can be found in the WLAN IPv4 and WLAN IPv6
sections. - In Set configuration, select DHCP (selected by default) or STATIC for the IP address configuration.
- Click Save.
Preparation of the MatriXX Resolution and miniPhantom R in the TPS System
Determine the reference dose with a CT scan. If using the Virtual CT MatriXX Resolution in miniPhantom R dataset, see Section 2.5.
- Place the MatriXX Resolution (or detector-phantom assembly) on the treatment couch and position it in the CT scanner using the alignment lasers. Align the CT origin with the isocenter markings (1).
- Position the device phantom assembly in the CT scanner so the central point of the measurement is at the CT origin.
- Point zero of the measurement system always coincides with point zero of the CT data set (the DICOM origin).
- In the TPS, the isocenter can be positioned precisely at the DICOM origin.
- Scan the entire phantom, taking care to not scan the electronics area of the MatriXX Resolution.
A CT scan resolution of 2.5 mm or lower should be used with standard departmental scanning protocol for soft tissue (pelvis, abdomen) imaging.
Cross-Calibration with Calibration Chamber or Dose Readout from the TPS
- Import the CT scan into the TPS.
- Create an external contour of the phantom, the MatriXX Resolution housing and the detector area.
- the miniPhantom R (1)
- the MatriXX Resolution housing (2)
- the detector (3)
If required, add a support (couch) to the CT scan.
Possible mass density overrides:
-
- miniPhantom R (RW3): 1.045 g/cm3
- MatriXX Resolution (ABS): 1.040 g/cm3
- Detector area (water): 1.00 g/cm3
See Section 2.1 in myQA Patients Instructions for Use for more information on densities.
- Verify the structures against the dimensions of the miniPhantom R and MatriXX Resolution assembly (total height of the phantom and distance to isocenter).
- On the image, set a point on the plane that corresponds to the LINAC isocenter alignment marks on
phantom surface and is shown on both coronal and transverse views. Label it. - In the TPS, create an open reference field (it is recommended to use the same algorithm as the patient plan) at 0° and have the system calculate the dose using a grid size of 2.5 mm or smaller.
- Find the isocenter plane and export the dose. The isocenter is set up geometrically based on the depth and central chamber position in the TPS image.
For cross-calibration with a calibration chamber:
- Aligning the phantom on the couch.
- Place the chamber in the chamber insert of the miniPhantom R.
- Attach the chamber to an electrometer, measure the background, and pre-irradiate the chamber.
- Irradiate an open field (dimensions and MU according to open field in TPS); record the chamber reading.
- Repeat the cross-calibration 3 to 4 times in order to ensure that the reading is stable.
Note: If not done by the electrometer – apply the KTP correction and calculate the dose. Re-check if the dose measured matches the dose calculated by the TPS.
Virtual CT for the MatriXX Resolution
A virtual CT of the MatriXX Resolution and miniPhantom R assembly is available for customers to use. See
the Virtual CT MatriXX RESOLUTION™ in miniPhantom R Quick Start Guide for more information.
- Download the Virtual CT scan of the MatriXX Resolution in miniPhantom R, and the corresponding
structure file. - Verify that the import contains 151 CT slices for the standard configuration, and 261 CT slices for the extended one.
- Position the isocenter at the DICOM origin (0,0,0)
- Check that the CT scan slice thickness is 2 mm
- Three structures should be contoured: miniPhantom R, MatriXX Resolution, and Detector
- Select the HU display tool in your TPS and verify the following assignments:
- miniPhantom R and MatriXX Resolution body (RW3 and ABS): 45 HU
- MatriXX Resolution detector layer (water): 0 HU
- Verify the HU against the densities of the miniPhantom R system using your calibration curve. When needed override to the corresponding densities.
- Verify the dimensions of the miniPhantom R and MatriXX Resolution in the virtual CT
- In the TPS, create a static reference field (recommended: 10 cm × 10 cm open field, 100MU) at 0° gantry and calculate the dose using the grid size used clinically.
- Find the isocenter plane and export the dose plane or export the 3D-dose and then select the evaluation plane in myQA Patient.
Setup the Device
- Open myQA (username: admin, password: admin).
- Navigate to myQA Platform (1) > Equipment Setup (2) and create a new Clinic (3).
- Create a New department / room (4) and machine (5).
- Define Beam Quality Index (BQI) prior to measurement. Please calculate the BQI according to the
selected energy (MV).
BQI definition LUTs is performed according to IAEA TRS-398; conversion of the beam quality is needed for customers using TG-51 beam quality definition. The simple ratio of D200/D100 should not be used as beam quality specifier for the LUTs. LUTs are for the density overrides as specified below.
| MatriXX Resolution in miniPhantom R | |
| LUTs (flat photon energy) | LUTs (FFF photon energy) |
| 6 MV (BQI = 0.6900) 10 MV (BQI = 0.7410) 15 MV (BQI = 0.7360) |
6 MV FFF (BQI = 0.6730) 6 MV FFF (BQI = 0.6233, Halcyon only) 6 MV FFF (BQI = 0.6340, TrueBeam only) 10 MV FFF (BQI = 0.7220) 10 MV FFF (BQI = 0.7060, TrueBeam only) |
Note: All energies used during measurement QA MUST have a BQI defined. The customer is responsible for the BQI value of their own machines.
Please verify the LUT tables used. The LUT Creator tool is available for customers to create custom lookup tables (see Chapter 5 of myQA Platform Instructions for Use).
Add the MatriXX Resolution as detector
- Click New detector (6) to open the Detector Editor.
- If the device is connected / online, it will appear under Online devices (this can take up to 30 seconds during the first connection).
- Click Copy device properties, name the device, and click Save.
Add an Output Calibration
- Select the MatriXX Resolution device in the Calibrations section. Click Edit.
- The MatriXX Resolution Editor opens, click the Connect > New output calibration button.
- Enter the necessary information for the Machine and Reference value sections (The reference value used is from the TPS dose or the measurement with a chamber).
Recommendation: Perform the output calibration at the maximum dose rate of the dose rate calibration. - For the output calibration enter the MU value into the LINAC consol.
Note: Use the same MU value used for the calculation/measurement of your reference dose in the TPS. - The field size and energy should correspond to your TPS calculation field size and energy (example:
100MU, 10 × 10 cm2 field).
Perform a measurement
- Click Measure to start the measurement.
- Turn on the beam.
- Click Stop when the beam has been delivered.
Note: You can perform multiple measurements (at least 3 are recommended). The final measured
value will be an average of all the measurements. - Enter the necessary information in the Save as section of the Output Calibration dialog.
- Click Finish. The MatriXX Resolution Editor opens with the new output calibration (Calibration measurements are listed in order of oldest to newest).
Add a Patient
- Switch to the myQA Patients (1) workspace.
- Click Import DICOM to import a new patient (2). The Select study to import dialog opens
- Under the File Based tab, click Update and select the correct file.
- In the Import dialog select the Patient, RTDOSE, and RTPLAN boxes.
- Click OK to create a patient and import the datasets
- Select a patient and click Create project from selected patient (3).
- Enter a name and the appropriate source axis distance.
Perform a Measurement
- Place the MatriXX Resolution or phantom-detector assembly on the treatment couch; the detector is aligned and power it on.
A 15-minute warm-up time is required before performing clinical measurements. - Go to the Measurement (1) workspace
- In the Equipment section, choose the online device and accelerator. Click Connect (2).
- Open the Background (3) dropdown menu and ensure the settings are correct.
- Click Measure Background (or the Background icon) to start the background measurement.
- Click on Settings (5) and ensure the following parameters are correct:
Machine Tab: Machine and Energy
Detector Tab: Rotation and SSD Phantom
Calibration Tab
Beam detection Tab: keep the default (factory setting) parameter values. - Choose the Measurement Mode (6) from the dropdown menu and click Start (7).
- Turn on the accelerator and irradiate the patient plan. Click Stop after the irradiation is done.
Analyze the Measurement
- Go to the Home (1) workspace
- After the measurement stops, the integral dose, which is computed automatically, can be found in the Measurement folder (2).
- The single frames can be found in the measurement subfolders (3) (named: YYYY-MM-DD Time).
- For easy comparison, drag-and-drop measurements and TPS dose to different panes.
Note: It is recommended that the lower resolution image (measurement) used as the reference (in the A pane) and the high resolution image (TPS) be used as the comparison (in the B pane).
For aligning the images in the A and B panes, click the Align data icon
This opens the Align data… dialog showing the alignment information. Click OK when the images have been aligned.
- Click
(in the lower-right pane). The Gamma results are shown on the right of myQA Patients. The default Gamma Parameters are a distance of 3 mm and a threshold of 3%. These values can be changed according to the specific PQA validation protocols being used.
- Check the passing rate (4) in Verification results.
- You can track your Workflow status (5) to indicate the progress of the plan: Import – Measure – Verify – Finalize – Approve.
- Click Approve (6) to open the Approval dialog (6a). Here you can indicate if the project is Open,
Approved, Needs Revision, or Declined. Comments can be added if necessary. Click OK to close the dialog. - Save your project (7) and click Print (8) to generate a Plan Verification Report.
- Select the Plan Verification Report type (10). If Default is selected, choose a Template (11).
- Select how you would like to generate the Plan Verification Report page for report example.
- When finished click Close (9) to close the current project. You can now exit the program or start with the next patient.