Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

On-line exit dose profile measurements by a diode linear array

C Fiorino1, C Uleri, G M Cattaneo

  • 1Servizio di Fisica Sanitaria, Istituto Scientifico H S Raffaele, Milano, Italy.

Physics in Medicine and Biology
|August 1, 1996
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

VIT-MBRT, a GPU accelerated Monte Carlo tool for investigations on preclinical minibeam radiation therapy.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)·2026
Same author

Predictors of acute lymphopenia after radiotherapy for prostate cancer including pelvic node irradiation: results of a real-world prospective multi-centric study.

ESMO real world data and digital oncology·2026
Same author

Breast Density Histogram Analysis: The Role of Fat in Outcome Prediction After Whole Breast Radiation Therapy.

Practical radiation oncology·2025
Same author

Early regression index (ERI) on MR images as response predictor in esophageal cancer treated with neoadjuvant chemo-radiotherapy: Interim analysis of the prospective ESCAPE trial.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·2024
Same author

Extended nodal radiotherapy for prostate cancer relapse guided with [11C]-choline PET/CT: ten-year results in patients enrolled in a prospective trial.

European journal of nuclear medicine and molecular imaging·2023
Same author

Dependence of the AUC of NTCP models on the observational dose-range highlights cautions in comparison of discriminative performance.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)·2023
Same journal

Impact of apertures on the out-of-field secondary neutron dose in collimated proton pencil-beam scanning.

Physics in medicine and biology·2026
Same journal

Quantifying cardiac deformable image registration accuracy and its dosimetric variability for 4D dose accumulation in stereotactic arrhythmia radioablation.

Physics in medicine and biology·2026
Same journal

Probabilistic modelling of bilateral lymphatic spread in oral cavity squamous cell carcinoma for personalised elective nodal treatment.

Physics in medicine and biology·2026
Same journal

A Monte Carlo simulation tool to analyze breast cancer trial outcomes: application to FAST-Forward trial.

Physics in medicine and biology·2026
Same journal

Effective contrast-enhanced preprocessing for intracranial artery segmentation in digital subtraction angiography.

Physics in medicine and biology·2026
Same journal

Improving Plan Quality in Adaptive Proton Therapy Using an Interactive Dose Modification Tool.

Physics in medicine and biology·2026
See all related articles

A diode linear array shows promise for on-line portal dosimetry, accurately measuring radiation exit dose profiles in phantoms. This system is suitable for transit dosimetry applications when the detector is close to the phantom.

Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Dosimetry

Background:

  • On-line portal dosimetry is crucial for verifying radiation therapy accuracy.
  • Diode arrays offer potential for real-time dose monitoring.
  • Accurate measurement of exit dose profiles is essential for treatment verification.

Purpose of the Study:

  • To investigate the suitability of a commercial diode linear array for on-line portal dosimetry.
  • To evaluate the system's ability to measure radiation exit dose profiles.
  • To assess the impact of scattered radiation and detector positioning on measurement accuracy.

Main Methods:

  • A commercial diode linear array (88 diodes, 0.5 cm spacing) was used.
  • Exit dose profiles were measured in homogeneous and inhomogeneous phantoms using 6 MV X-ray beams.

Related Experiment Videos

  • Measurements were compared with those from a standard ionization chamber.
  • The influence of air gap and field width on scattered radiation was analyzed.

    • Main Results:

    • The diode array successfully measured relative exit dose profiles.
    • Good agreement was achieved between diode array and ionization chamber measurements (max difference 3.8%).
    • Accuracy improved to 2.5% difference when the array was in contact with the phantom.
    • Measurement accuracy was maintained when the array-phantom distance was below 7.5 cm.

    Conclusions:

    • The commercial diode linear array is a viable tool for on-line portal dosimetry.
    • The system demonstrates accuracy in measuring exit dose profiles for homogeneous and inhomogeneous phantoms.
    • The diode array is suitable for transit dosimetry applications, provided proper detector positioning is maintained.