ArticlePhysics and imaging in radiation oncology2020
Evaluation of automated pre-treatment and transit in-vivo dosimetry in radiotherapy using empirically determined parameters.
Article in Physics and imaging in radiation oncology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
31 citing papers in PubMed, 54 citations in OpenAlex.
- Does the traffic light protocol capture dose deviations? A longitudinal CBCT-based dose-monitoring study in adaptive RT for LA-NSCLC.Technical innovations & patient support in radiation oncology · 2026Article
- Evidence-based design of a patient-specific quality assurance program through retrospective analysis of pretreatment andPhysics and imaging in radiation oncology · 2026Article
- In-vivo dosimetry using electronic portal imaging in online-adaptive radiotherapy for rectal cancer.Physics and imaging in radiation oncology · 2026Article
- A component-wise commissioning and validation framework for non-transit electronic portal imaging device patient-specific quality assurance.Physics and imaging in radiation oncology · 2026Article
- An efficient automated approach for accumulated dose estimation in prostate cancer radiotherapy.Physics and imaging in radiation oncology · 2026Article
- Determining optimal transit dosimetry gamma parameter values for the detection of failure modes using receiver operating curve analysis.Journal of applied clinical medical physics · 2026Article
- Real-Time Dose-Guided Radiation Therapy.International journal of radiation oncology, biology, physics · 2025Review
- Validation of in vivo dose using EPID combined with fan-beam CT guidance in post-breast-conserving radiotherapy for early-stage breast cancer.BMC cancer · 2025Article
- Detection of the failed-tolerance causes of electronic-portal-imaging-device-basedPhysics and imaging in radiation oncology · 2025Article
- A commissioning protocol for portal imaging-based radiotherapy in vivo dosimetry systems.Physics and imaging in radiation oncology · 2024Article
- A Preliminary Investigation of Radiation-Sensitive Ultrasound Contrast Agents for Photon Dosimetry.Pharmaceuticals (Basel, Switzerland) · 2024Article
- Validation of an in vivo transit dosimetry algorithm using Monte Carlo simulations and ionization chamber measurements.Journal of applied clinical medical physics · 2024Article
- Systematic evaluation of spatial resolution and gamma criteria for quality assurance with detector arrays in stereotactic radiosurgery.Journal of applied clinical medical physics · 2024Article
- Multi-institutional generalizability of a plan complexity machine learning model for predicting pre-treatment quality assurance results in radiotherapy.Physics and imaging in radiation oncology · 2024Article
- The role of EPID in vivo dosimetry in the risk management of stereotactic lung treatments.Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al] · 2023Article
- The application of gradient dose segmented analysis of in-vivo EPID images for patients undergoing VMAT in a resource-constrained environment.Journal of applied clinical medical physics · 2023Article
- AAPM Task Group Report 307: Use of EPIDs for Patient-Specific IMRT and VMAT QA.Medical physics · 2023Review
- Selective de-implementation of routine in vivo dosimetry.Journal of applied clinical medical physics · 2023Review
- Gamma passing rates of daily EPID transit images correlate to PTV coverage for breast cancer IMRT treatment plans.Journal of applied clinical medical physics · 2023Article
- Radiotherapy planning in a prostate cancer phantom model with intraprostatic dominant lesions using stereotactic body radiotherapy with volumetric modulated arcs and a simultaneous integrated boost.Frontiers in oncology · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
background and purposeFirst reports on clinical use of commercially automated systems for Electronic Portal Imaging Device (EPID)-based dosimetry in radiotherapy showed the capability to detect important changes in patient setup, anatomy and external device position. For this study, results for more than 3000 patients, for both pre-treatment verification and in-vivo transit dosimetry were analyzed. MATERIALS AND
methodsFor all Volumetric Modulated Arc Therapy (VMAT) plans, pre-treatment quality assurance (QA) with EPID images was performed. In-vivo dosimetry using transit EPID images was analyzed, including causes and actions for failed fractions for all patients receiving photon treatment (2018-2019). In total 3136 and 32,632 fractions were analyzed with pre-treatment and transit images respectively. Parameters for gamma analysis were empirically determined, balancing the rate between detection of clinically relevant problems and the number of false positive results.
resultsPre-treatment and in-vivo results depended on machine type. Causes for failed in-vivo analysis included deviations in patient positioning (32%) and anatomy change (28%). In addition, errors in planning, imaging, treatment delivery, simulation, breath hold and with immobilization devices were detected. Actions for failed fractions were mostly to repeat the measurement while taking extra care in positioning (54%) and to intensify imaging procedures (14%). Four percent initiated plan adjustments, showing the potential of the system as a basis for adaptive planning.
conclusionsEPID-based pre-treatment and in-vivo transit dosimetry using a commercially available automated system efficiently revealed a wide variety of deviations and showed potential to serve as a basis for adaptive planning.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.