Error Sensitivity

Implementation of a Transmission Chamber (IQM) as a Dosimetric System for Verification of Radiotherapy Treatments (English translation)

Authors: A. Gómez Barrado, A. Sánchez Jiménez. GenesisCare La Milagrosa, Spain Summary: A study from GenesisCare La Milagrosa (Madrid), presented at SEFM 2025, evaluated the IQM system across 18 linear accelerators and 106 SRS/SBRT treatments. The results confirmed that IQM is reliable, reproducible, and easy to integrate into clinical practice, even for complex techniques.

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Implantacion de Camara de transmission (IQM) como sistema dosimetrico de verificacion de tratamientos de radioterapia (Spanish)

Autores: A. Gómez Barrado, A. Sánchez Jiménez. GenesisCare La Milagrosa, Spain Resumen: Un estudio de GenesisCare La Milagrosa (Madrid), presentado en el SEFM 2025, evaluó el sistema IQM en 18 aceleradores y 106 tratamientos de SRS/SBRT. Los resultados confirmaron que IQM es fiable, reproducible y fácil de integrar en la práctica clínica, incluso en técnicas

Implantacion de Camara de transmission (IQM) como sistema dosimetrico de verificacion de tratamientos de radioterapia (Spanish) Read More »

A Comparison of Segment-by-Segment Versus Cumulative Signal Evaluation for Patient-Specific QA using the IQM

Author: Farideh Pak, PhD, et al, Cedars Sinai Medical Center, Los Angeles, CA, USA Summary: This study from Cedars Sinai Medical Center evaluates the IQM system for patient-specific QA across 37 VMAT treatment plans covering brain, spine, lung, and prostate sites. The authors compare segment-by-segment and cumulative signal analysis, demonstrating that segment-level evaluation improves the

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Experience of IQM at Southampton for SRS cases

Author: Chandrasekaran, M., et al, University Hospital Southampton, United Kingdom Summary: Mekala Chandrasekaran from University Hospital Southampton presented their successful implementation of IQM for single-isocentre SRS treatments of multiple brain metastases. By extending beam modeling to sub-centimeter fields, the team achieved segment-by-segment accuracy within 3%, confirming IQM’s precision and reliability for complex stereotactic QA.

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Experience of IQM at Southampton for CNS and SRS cases

Author: Smith, L., et al, University Hospital Southampton, United Kingdom Summary: Laura Smith from University Clinic Southampton presents their experience using IQM for CNS and SRS treatments. By replacing Delta4 with IQM, her team reduced verification time from 3 hours to under 30 minutes per case. The presentation highlights IQM’s efficiency, automation, and suitability for

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Enhancing quality assurance in hybrid DCAT plans: The impact of reduced maximum dose rate

Author: Kollotzek, S., et al, Universitätsklinik für Strahlentherapie-Radioonkologie, Medizinische Universität Innsbruck,  Austria Summary: The goal of this project is to evaluate the accuracy of dose delivery for hybrid DCAT plans under different conditions, with a focus on how adjusting the linac’s maximum dose rate impacts the alignment between planned and delivered doses.

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Optimisation of Elements beam model and IQM dose calculation model for single isocentre multiple brainmets patient specific dosimetry

Author: M. Chandrasekaran1, et al, University Hospital Southampton (UK) Summary: This study aimed to find the best fit Elements multi leaf collimator (MLC) parameters and improve the accuracy of the IQM dose calculation model for single isocentre treatment for multiple brainmets (MBM) and patient specific dosimetry (PSD) for Elekta Agility Versa HD linac. .

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