Patient QA comparison
PTW OCTAVIUS alternative: Sun Nuclear ArcCHECK
Comparing OCTAVIUS Detector 1500, OCTAVIUS 4D, OCTAVIUS SRS detectors or VeriSoft? This page positions that PTW workflow against ArcCHECK with SunCHECK Patient for IMRT, VMAT and stereotactic QA.
What is usually in the PTW OCTAVIUS shortlist?
OCTAVIUS Detector 1500
Planar ionisation-chamber array for IMRT and VMAT patient-specific QA.
OCTAVIUS Detector 1000 / 1600 SRS
Small-field detector arrays used for stereotactic QA workflows and high-resolution checks.
OCTAVIUS 4D phantom
Motorised cylindrical phantom that rotates the planar array with gantry angle for 3D dose reconstruction.
VeriSoft
PTW analysis software for plan verification, dose comparison and gamma evaluation.
Why ArcCHECK is a strong alternative
ArcCHECK uses a cylindrical PMMA phantom with a helical detector arrangement. The geometry is built for arc therapy: it keeps a consistent beam view across gantry angles and avoids a motorised rotation step during measurement.
- Three-dimensional detector geometry around the cylindrical volume.
- Entry and exit dose information for patient-specific IMRT and VMAT QA.
- Direct fit with SunCHECK Patient for centralised QA review and records.
- Can be complemented with SRS MapCHECK for high-resolution small-field work.
- ArcCHECK-MR is available when MR-linac QA is part of the department roadmap.
Side-by-side technical comparison
| Decision point | PTW OCTAVIUS workflow | Sun Nuclear ArcCHECK + SunCHECK |
|---|---|---|
| Detector geometry | Planar detector array used with a 4D rotating phantom for volumetric reconstruction. | Cylindrical phantom with a helical detector grid around the measurement volume. |
| Rotational QA | Uses mechanical rotation of the array to keep the detector plane aligned with the beam. | Measures rotational delivery with the cylindrical array fixed in the beam path. |
| Detector technology | Ionisation chamber arrays, including dedicated detector options for SRS workflows. | SunPoint diode detectors for routine ArcCHECK measurements; SRS MapCHECK can cover smaller fields. |
| Software workflow | VeriSoft analysis for dose comparison and gamma evaluation. | SunCHECK Patient centralises plan QA review, trending and documentation; 3DVH can add volumetric dose analysis. |
| Daily practicality | One ecosystem built around PTW detector arrays and OCTAVIUS phantom accessories. | A compact arc-QA phantom connected to a broader Sun Nuclear QA platform. |
| Best fit | Departments standardised on PTW measurement hardware and VeriSoft. | Departments wanting an integrated Sun Nuclear patient-QA workflow for VMAT, IMRT and stereotactic extensions. |
The comparison uses conservative wording where current public datasheets do not expose directly equivalent values. Final specifications should be checked against the current manufacturer documentation.
Where ArcCHECK tends to fit best
VMAT-heavy departments
The helical cylindrical geometry is well suited to rotational treatments, where the beam moves continuously around the patient.
Teams moving toward centralised QA
SunCHECK Patient helps consolidate patient-specific QA review, reports and traceability.
Mixed IMRT, VMAT and SRS workloads
ArcCHECK can cover routine patient QA, while SRS MapCHECK can be added for high-resolution small fields.
Long-term platform planning
The same QA ecosystem can connect patient QA, machine QA and advanced volumetric review options.
Need to compare PTW OCTAVIUS with ArcCHECK?
Send us the techniques you treat, your TPS and linac context, and whether SRS or MR workflows are in scope. 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