Patient QA comparison
IBA MatriXX alternative: Sun Nuclear ArcCHECK and SunCHECK
If you are comparing IBA MatriXX Evolution, MatriXX Resolution or myQA Patients for pre-treatment and in-vivo QA, this page explains how ArcCHECK with SunCHECK Patient fits the same clinical decision.
The IBA MatriXX shortlist, in practical terms
MatriXX Evolution
Planar 2D array with 1020 vented ionisation chambers, 32 x 32 matrix, 7.62 mm spacing and a 24.4 x 24.4 cm field. It can use an inclinometer for composite VMAT verification.
MatriXX Resolution
Planar 2D chamber array with 1521 measurement points, 6.5 mm spacing and a 25.3 x 25.3 cm field, positioned by IBA for higher-resolution IMRT and VMAT QA.
myQA Patients
IBA software for patient-specific QA, dose comparison and gamma analysis. EPID or log-file based workflows are associated with the myQA iON module.
Planar geometry
The MatriXX family measures in a plane. For composite VMAT, the workflow typically relies on gantry-angle information and angular-response correction.
The Sun Nuclear alternative
ArcCHECK is a cylindrical patient-QA phantom with 1386 SunPoint diode detectors arranged in a helical grid. Instead of measuring the arc on a flat detector plane, ArcCHECK samples the delivery around the cylindrical measurement volume and connects directly to the SunCHECK Patient platform.
- Cylindrical 3D measurement geometry for IMRT, VMAT, SBRT and MRgRT workflows.
- Entrance and exit dose information with a virtual inclinometer derived from the measured delivery.
- SunCHECK Patient can combine PlanCHECK, pre-treatment array QA, phantomless QA and in-vivo review in one database.
- Small-field stereotactic QA can be extended with SRS MapCHECK when resolution requirements justify a dedicated detector.
- ArcCHECK, SunCHECK Patient, MapCHECK and SRS MapCHECK can be planned as one QA ecosystem rather than isolated tools.
Side-by-side technical comparison
| Decision point | Sun Nuclear ArcCHECK + SunCHECK Patient | IBA MatriXX Resolution | IBA MatriXX Evolution | IBA myQA Patients |
|---|---|---|---|---|
| Detector technology | SunPoint diode detectors in a cylindrical phantom. | Ionisation chambers in a planar 2D array. | Ionisation chambers in a planar 2D array. | Software platform; uses supported measurement sources. |
| Measurement points | 1386 diodes. | 1521 chambers. | 1020 chambers. | Not an array by itself. |
| Geometry | Cylindrical helical grid around the measurement volume. | Planar array. | Planar array. | Software workflow for QA analysis. |
| Detector spacing / field | Configurable effective spacing in the ArcCHECK workflow; measured field up to 21 cm diameter, with combined measurements for extended fields. | 6.5 mm spacing; 25.3 x 25.3 cm field. | 7.62 mm spacing; 24.4 x 24.4 cm field. | Depends on measurement source and module. |
| Composite VMAT | Cylindrical measurement with a virtual inclinometer derived from entrance and exit dose. | Planar measurement with gantry-angle information and angular-response correction. | Planar measurement with inclinometer support. | Can support EPID or log-file workflows through myQA iON. |
| Software scope | SunCHECK Patient: plan QA, array QA, phantomless and in-vivo workflows in a central database. | myQA Patients ecosystem. | myQA Patients ecosystem. | Patient-QA software platform. |
| Best fit | Departments that want a Sun Nuclear platform for patient QA, machine QA links and stereotactic extensions. | Departments standardised on IBA planar arrays and myQA. | Departments using established MatriXX planar-array workflows. | Departments committed to the IBA software workflow. |
This is a conservative technical comparison based on public manufacturer information and existing Interphysix content. Current official datasheets should be checked before final specification or purchase.
Where ArcCHECK tends to win the workflow discussion
Rotational treatment QA
The cylindrical detector layout naturally follows the clinical shape of arc therapy, instead of reconstructing an arc from a flat plane.
Centralised patient QA
SunCHECK Patient helps bring plan checks, measurement review, reporting and trending into one QA record.
Mixed VMAT, SBRT and SRS work
ArcCHECK can cover routine patient QA, while SRS MapCHECK can be added for high-resolution stereotactic checks.
Platform planning
The same ecosystem can connect patient QA, machine QA and volumetric review options as the department grows.
Need to compare MatriXX with ArcCHECK?
Send us your treatment techniques, TPS, linac context and the QA workflows you want to consolidate. Interphysix can help validate the right Sun Nuclear configuration.
Product and brand names belong to their respective owners. This page is an informational technical comparison and does not imply endorsement or partnership with competitor brands. Specifications are based on public manufacturer information and existing Interphysix content, and should be confirmed against current official datasheets before purchase.
Última actualização: 30/06/2026