Delta4 Machine QA 3D

Advanced machine QA done in a few minutes

The Delta4 Machine QA 3D software option for fast data acquisition and advanced data analysis allows you to perform QA of your linac, specifically in relation to rotation, start-up behavior, and dynamic beam modulation.

Easily define the test sequences that allow you to perform extended accelerator QA for IMRT and VMAT—in just a few minutes.

Automated machine-specific tests with 3D verification of highly modulated treatment plans

Check stability with high accuracy and detailed analysis using a protocol based workflow

Monitors linearity, output constancy, and output versus dose rate

Measures interleaf leakage across the MLC bank and monitors changes over time

Beam constancy at various gantry angles

Check MLC performance at various gantry angles

Discover and track long-term effects and trends

Periodic machine QA and analysis of constancy

Did you know that measurements made by the Machine QA 3D option for your Delta4 system can be compared with TPS data or a reference measurement at any time? Reference measurements are typically obtained following maintenance and acceptance of the machine. The measurements can then be run directly in the RT machine’s service mode. Simply set up the configuration directly in Delta4.

Alternatively, the Machine QA 3D option lets you create a DICOM RT Plan file including all tests to be performed, profiles, depth doses, and MLC checks, all at the same time! The QA routine can then be stored in the record-and-verify system and run over and over again on demand.

This routine can be easily added and run as part of pre-treatment verification with Delta4—and save you loads of time. As always with Delta4, analysis can be done at a later time according to your preference.

Delta4 Machine QA 3D

For dynamic radiotherapy technology

Machine QA 3D

Go beyond individual machine parameters by using a highly modulated treatment plan to evaluate the overall performance of your linac. Select a plan that challenges your linac’s capabilities and measure it regularly with the Delta4 Phantom+. Each measurement can be compared against the reference using Gamma Evaluation, providing an intuitive visualization of changes in dose delivery and helping you monitor machine performance over time.

Check stability with high accuracy and detailed analysis

A unique feature of the Delta4 data acquisition is that each dose pulse is measured individually and with very high accuracy. Not yet possible to achieve with other systems that sample data, this unique feature provides the basis for detailed study of accelerator startup behavior, even on a sub-MU level. Delta4 integrates one dose pulse (typically 1 mGy) at a time with a resolution of 50 nGy. The total dose is the sum of all the individual doses measured per pulse, with accuracy maintained from the lowest to the highest dose levels.

MAchine QA 3D. Check stability with high accuracy and detailed analysis
MLC performance check in various gantry angles and picket fence test

MLC performance check in various gantry angles and picket fence test

A correctly delivered dose very much depends on the field opening or the gap between leafs. The actual gap size can therefore be directly compared to the planned gap size. This comparison is carried out instantly and clearly visualized with color diagrams. MLC checks can be performed at various gantry angles to verify possible performance changes due to gravity impact on the mechanics.

Check stability with high accuracy and detailed analysis

A unique feature of the Delta4 data acquisition is that each dose pulse is measured individually and with very high accuracy. Not yet possible to achieve with other systems that sample data, this unique feature provides the basis for detailed study of accelerator startup behavior, even on a sub-MU level. Delta4 integrates one dose pulse (typically 1 mGy) at a time with a resolution of 50 nGy. The total dose is the sum of all the individual doses measured per pulse, with accuracy maintained from the lowest to the highest dose levels.

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Delta4 Machine QA 3D

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Delta4 takes machine QA to an advanced and efficient level

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Updates from Delta4

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Clinical experience: Using Delta4 Phantom+ and HexaMotion for confidence in advanced QA

Clinical experience. Learn how Hospital Gómez Ulla uses Delta4 Phantom+ and Delta4 HexaMotion to support an efficient radiotherapy patient QA workflow and motion management in clinical practice. Delivering radiotherapy requires confidence at every [...]

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SW May2025

Delta4 Software June 2026 Release

Release Notes The Delta4 Software June 2026 release introduces new functionality for Machine QA, improved gamma evaluation, and enhancements to the Statistics module, helping clinics monitor machine performance more efficiently. To ensure [...]

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ScandiDos Unveils Delta4 SRS Pro for SRS and SBRT QA

ScandiDos, a global leader in radiotherapy quality assurance, is proud to introduce Delta4 SRS Pro. This next-generation patient QA system enables high-precision 3D measurements at the isocenter for complex SRS and SBRT [...]

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