Efficient EPID-based in vivo dosimetry software

Highly targeted, rapid delivery techniques such as intensity modulated radiation therapy (IMRT) and volumetric modulated radiation therapy (VMAT) demand the highest degree of accuracy in dose delivery. This is especially important when these techniques are used in stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT), which employ higher therapeutic doses. iViewDose EPID-based in vivo dosimetry software provides an efficient safety check on the accuracy of dose delivery.

iViewDose overcomes previous limitations in quality assurance. Studies have demonstrated that pretreatment measurements, such as phantoms with ionization chambers or diode arrays are unable to detect all sources of error. Similarly, the improved confidence in patient position that in-room imaging tools provide does not guarantee accurate dose delivery, as these tools can’t account for machine malfunctioning, data corruption or changes in patient anatomy.

Capable of detecting gross errors in radiotherapy, iViewDose provides an end-to-end verification of the entire treatment process – with the potential to detect more types of errors, and detect them faster, than traditional verification methods. Therefore, iViewDose gives clinicians a vital safety check for advanced treatments such as IMRT and VMAT.

Data is captured during treatment delivery using the EPID. Then, a intelligent dose reconstruction algorithm calculates the dose delivered to the patient as derived from the dose delivered to the MV panel. This is automatically compared to the planned dose distribution. Through a traffic light system, the software alerts users to deviations from the treatment plan. In the event significant discrepancies are found, physicists can take corrective actions before subsequent fractions are delivered.


  • Requires no additional dose delivered to the patient
  • Increases clinical confidence by detecting dose errors during treatment, including those caused by changes in patient anatomy
  • Enhances workflow efficiency and resource utilization by employing the treatment system’s existing EPID
  • Prompts user intervention with a simple traffic light system
  • Facilitates compliance with national and international guidelines

iViewDose is not available for sale in all markets. Please contact your local sales representative for more information.

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Treatment solutions

At the forefront of clinical advancements, Elekta has been instrumental in delivering techniques like IGRT, IMRT, VMAT as well as SBRT and SRT. These techniques have given clinicians the flexibility to deliver conventional therapies to treat a wide range of tumors throughout the body, while also enabling treatment of highly complex cancers that require extreme targeting precision.