Calculation algorithms

RadCalc provides Collapsed Cone Convolution Superposition and Monte Carlo based algorithm modules that deliver fast, easy, and accurate 3D Dose Volume verification for most commonly used treatment planning systems. Our new EPID module delivers TG 218 compliant pre-treatment and in-vivo calculations. Acquired in-vivo images are transmitted back through the patient to determine the incident fluence, differentiating it from all other available solutions.

How 3D patient QA highlights uncertainties and catches errors

EPID based pre-treatment and in-vivo dosimetry



RadCalc’s EPID module utilizes the collected integrated measurements for all static and dynamic beam segments to reconstruct 3D dose on the patient’s real anatomy using RadCalc's Collapsed Cone algorithm.

Supported modalities

Supporting commercially available linear accelerators with integrated EPID panels for all treatment techniques.

True composite

Actual dose delivered is compared with both the intended dose from the TPS and RadCalc’s 3D dose reconstruction for a thorough pre-treatment QA.

Inherent sensitivity

RadCalc’s implementation exploits the inherent sensitivity of the EPID to changes in the patient making it a valuable tool for analysing deviations from the intended dose.

“RadCalc’s EPID is seamlessly integrated into the clinical workflow. It provides accurate and fast pre-treatment and in-vivo patient verification.”

Carlos Bohorquez, Product Manager RadCalc

Introducing RadCalc's EPID module



Inherent LINAC-EPID automation and integration saves time and effort for data capture.

Thorough QA

In-vivo EPID monitoring to verify patient setup errors, patient anatomy changes and identify machine errors.

Simple QA for complex treatments

In-air EPID based pre-treatment QA presented directly on patient anatomy helps identify dose delivery errors against treatment plans.In-air EPID based pre-treatment QA presented directly on patient anatomy helps identify dose delivery errors against treatment plans.

Easy Configuration

Easy installation and fast time to usage. Supports most clinical configurations of TPS, LINACs and supporting systems.

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Collapsed Cone

Monte Carlo


Calculation speed ranges from 3-10 minutes independent of the delivery technique. The calculation speed is mainly determined by the average size of MLC apertures and the target volume.


RadCalc provides a fully automated process for your QA routine. It alerts you instantly to plans that fail to pass your pre-set Gamma Analysis acceptance criteria and checks whether DVH objectives are met for critical structures. 


The Monte Carlo module utilizes the most established Monte Carlo dose engine available (BEAMnrc). In combination with proprietary machine modelling it achieves very high accuracy of calculation.

The need for using a Monte Carlo-based QA software

"This work is the result of over 20 years of expertise in application of MC simulations in radiotherapy.

With the RadCalc MC module we had the goal to bring fast MC calculations to the clinic in a user-friendly way."

Marc-André Renaud
Medical Physicist at McGill University, Montreal

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