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Real-time dose reconstruction for wedged photon beams: a generalized procedure

A. Piermattei, F. Greco, A. Fidanzio, L. Azario, A. Porcelli, S. Cilla, D. Sabatino, A. Russo, G. D'Onofrio, M. Russo
2011 Journal of Applied Clinical Medical Physics  
and equipped with aSi electronic portal imaging devices (aSi EPIDs).  ...  commissioning step and supplies for Varian, Elekta, and Siemens linacs equipped with the aSi EPIDs a quasi-real time in vivo dosimetry for open and wedged 3DCRTfields.  ...  (2) Some researchers have demonstrated the advantages of reconstructing the delivered dose during the treatment using a 2D array as the amorphous silicon electronic portal imaging device (aSi EPID)  ... 
doi:10.1120/jacmp.v12i4.3538 pmid:22089008 pmcid:PMC5718746 fatcat:knkb462qhzgybbqmkwsxkxr6b4

A literature review of electronic portal imaging for radiotherapy dosimetry

Wouter van Elmpt, Leah McDermott, Sebastiaan Nijsten, Markus Wendling, Philippe Lambin, Ben Mijnheer
2008 Radiotherapy and Oncology  
Electronic portal imaging devices (EPIDs) have been the preferred tools for verification of patient positioning for radiotherapy in recent decades.  ...  Methods to integrate 3D in vivo dosimetry and image-guided radiotherapy (IGRT) procedures, such as the use of kV or MV cone-beam CT, are under development.  ...  The authors are also grateful to the colleagues at MAAS-TRO and NKI-AVL for contribution to discussions about the clinical role of EPID dosimetry in a radiotherapy department.  ... 
doi:10.1016/j.radonc.2008.07.008 pmid:18706727 fatcat:myxofnhvszatno2sfdf3mhwfa4

ON RADIOTHERAPY DOSE VERIFICATION WITH A FLAT-PANEL IMAGER

L. McDermott
2009 Radiotherapy and Oncology  
In vivo dosimetrie met een optimaal aantal fracties, in 2D of bij voorkeur in 3D, is een goede manier om te garanderen dat patiënten de geplande behandeling ook daadwerkelijk krijgen.  ...  The authors would like to thank Gerben Borst M.D., Katrien de Jaeger M.D.and René Tielenburg for help in analysing and interpreting anatomical changes in difference images.  ...  The electronic portal imaging device (EPID) is a feasible candidate for such a system.  ... 
doi:10.1016/s0167-8140(12)72717-2 fatcat:6kffkogb2jbnpikzeiydnmvaia

In vivo dosimetry in UK external beam radiotherapy: current and future usage

Niall D MacDougall, Michael Graveling, Vibeke N Hansen, Kevin Brownsword, Andrew Morgan
2017 British Journal of Radiology  
In vivo dosimetry in UK external beam radiotherapy: current and future usage. Br J Radiol 2017; 90: 20160915.  ...  ACKNOWLEDGMENTS The authors and board would like to thank the following people for their help in preparing the report: Radiotherapy Board  ...  Evaluation and implementation of in vivo transit dosimetry with an electronic portal imaging device. [In French.]  ... 
doi:10.1259/bjr.20160915 pmid:28205452 pmcid:PMC5605079 fatcat:srlvo4qnpfh3za72inexoxohqe

Commissioning and Evaluation of an Electronic Portal Imaging Device-Based In-Vivo Dosimetry Software

Mareike Held, Joey Cheung, Angelica Perez Andujar, François Husson, Olivier Morin
2018 Cureus  
After the initial commissioning process, clinical experiments on phantom treatments were evaluated to assess the level of accuracy of the electronic portal imaging device (EPID) based in-vivo dose verification  ...  All tests were performed using blocks of solid water slabs as a phantom.  ...  FIGURE 3 : 3 FIGURE 3: Measurement setup a) Dose measured in solid water. b) Portal image captured with the electronic portal imaging device (EPID).  ... 
doi:10.7759/cureus.2139 pmid:29632749 pmcid:PMC5880591 fatcat:xfqrsnhywvehzeghxetxajvhru

IMRT verification by three-dimensional dose reconstruction from portal beam measurements

M. Partridge, M. Ebert, B-M. Hesse
2002 Medical Physics (Lancaster)  
The exact position of the phantom at the time of treatment is measured by acquiring megavoltage CT data with the treatment beam and a research prototype, flat-panel, electronic portal imaging device.  ...  The signal measured by the portal imaging device is converted to primary fluence using an iterative phantomscatter estimation technique.  ...  The authors are also very grateful to Phil Evans from the Institute of Cancer Research, London, for comments on this work and for the use of their Monte Carlo code.  ... 
doi:10.1118/1.1494988 pmid:12201432 fatcat:7y4n47evurckbnoiqxbz7c3e64

Dosimetry with a fluoroscopic electronic portal imaging device

Kasper L. Pasma
2000 Medical Physics (Lancaster)  
for the daily acquisition of the images during patient treatment and for the effort that has been made to implement the procedures in clinical practice.  ...  Acknowledgements The authors would like to thank Martin Opdam for his help with the measurements, Joep Stroom for useful discussions and the technologists working at the MM50 racetrack microtron for their  ...  In vivo dosimetry for prostate cancer patients using an electronic portal imaging device (EPID); detection of internal organ motion. Radiother. Oncol., 49:125-132, 1998.  ... 
doi:10.1118/1.598850 fatcat:kn63gtiakzfaxfefrx4cl4mseq

A Model for Online Interactive Remote Education for Medical Physics Using the Internet

Milton K Woo, Kwan-Hoong Ng
2003 Journal of Medical Internet Research  
Absolute in vivo dosimetry is performed using photon diodes placed on the patient surface.  ...  All clinical reference dosimetry is performed in a water phantom. The reference depth for calibration purposes is 10 cm for photon beams and 0.6 50 R -0.1 cm for electron beams.  ...  This imaging device is configured for use in conventional radiographic imaging.  ... 
doi:10.2196/jmir.5.1.e3 pmid:12746208 pmcid:PMC1550549 fatcat:tsyf45yusza2jiglkq62rgo3qm

EPSM 2020, Engineering and Physical Sciences in Medicine

2021 Physical and Engineering Sciences in Medicine  
Limited experience in conducting online exams resulted in a steep learning curve to identify methods to assure academic integrity.  ...  Conclusions The ANZCCs agreed that whilst online teaching could offer new opportunities, F2F teaching has significant advantages, and the hospital experience is essential for our vocational-style courses  ...  Acknowledgements I would like to thank the Royal Children's Hospital in Melbourne for providing the phantom used in the study.  ... 
doi:10.1007/s13246-021-01024-z pmid:34424484 pmcid:PMC8381140 fatcat:7jrqj62qgzhcxaiztb627teqxe

Sci-Fri PM: Planning-07: A low diffusion radiochromic gel dosimeter for three-dimensional radiation dosimetry

S Babic, J Battista, K Jordan
2008 Medical Physics (Lancaster)  
A general fluence determination for portal dose image prediction would be a great asset in order to model the complex modulation of IMRT.  ...  MB Amorphous silicon (a-Si) electronic portal imaging devices (EPIDs) have been heavily investigated as treatment verification tools, with a particular focus on intensity modulated radiation therapy (IMRT  ...  in vivo.  ... 
doi:10.1118/1.2965979 pmid:28512904 fatcat:sjyi6dusdfcnpkcouokve7itdq

2016 AAPM Spring Clinical Meeting - Abstracts

2016 Journal of Applied Clinical Medical Physics  
An integrated film dosimetry protocol was established with in-house software to streamline a nine dose pattern delivery for dose calibration, calibration curve fitting, dose mapping from multiple color  ...  Results Investigation using a calibrated 2D diode array demonstrated a large change in the 6 MV beam's radial symmetry of ~10%.  ...  Purpose This works explains the method by which the electronic portal imaging device (EPID) on a Varian Medical Systems treatment machine may be used for fluence-based patient-specific IMRT quality assurance  ... 
doi:10.1120/jacmp.v17i3.6370 pmid:27167295 pmcid:PMC5690907 fatcat:a2okacsbazchliqq52cnf7ectq

Applications of linac-mounted kilovoltage Cone-beam Computed Tomography in modern radiation therapy: A review

Justin Shepherd
2014 Polski przeglad radiologii i medycyny nuklearnej  
This is followed by a concise review of the main issues associated with CBCT, such as imaging artifacts, dose and image quality.  ...  The use of Cone-beam Computed Tomography (CBCT) in radiotherapy is increasing due to the widespread implementation of kilovoltage systems on the currently available linear accelerators.  ...  Later, Electronic Portal Imaging Devices (EPIDs) mounted on a linac using robotic arms were introduced into clinical practice.  ... 
doi:10.12659/pjr.890745 pmid:25006356 pmcid:PMC4085117 fatcat:vezppkles5epvfqhj6mn2tc6sm

TU-B-I-617-01: High Field MRI - Technology, Applications, Safety, and Limitations

RJ Stafford
2005 Medical Physics (Lancaster)  
One method for validating motion is portal imaging using electronic portal imaging devices (EPIDs).  ...  For each patient, a CT-study obtained 1-month after the procedure was used for post-implant dosimetry.  ...  : To test the amorphous silicon (aSi) electronic portal imaging device (EPID) for quality assurance (QA) of the multi-leaf collimators (MLC) and to validate its use as a dynamic intensity-modulated radiation  ... 
doi:10.1118/1.1999700 fatcat:yub56igoe5cl3cthdpzwrdvjp4

TU-EE-A3-05: Scatter Radiation in Digital Tomosynthesis

B Liu, S Glick, X Gong
2005 Medical Physics (Lancaster)  
One method for validating motion is portal imaging using electronic portal imaging devices (EPIDs).  ...  For each patient, a CT-study obtained 1-month after the procedure was used for post-implant dosimetry.  ...  : To test the amorphous silicon (aSi) electronic portal imaging device (EPID) for quality assurance (QA) of the multi-leaf collimators (MLC) and to validate its use as a dynamic intensity-modulated radiation  ... 
doi:10.1118/1.1998434 fatcat:jnqebvqstnhixdmecqmh35gfbi

SU-EE-A3-06: An Efficient Algorithm for Image-Based Dose Deformation and Accumulation

M Kaus, V Pekar, T McNutt, K Bzdusek
2005 Medical Physics (Lancaster)  
One method for validating motion is portal imaging using electronic portal imaging devices (EPIDs).  ...  For each patient, a CT-study obtained 1-month after the procedure was used for post-implant dosimetry.  ...  : To test the amorphous silicon (aSi) electronic portal imaging device (EPID) for quality assurance (QA) of the multi-leaf collimators (MLC) and to validate its use as a dynamic intensity-modulated radiation  ... 
doi:10.1118/1.1997464 fatcat:zue2hfmc5ze6ziwu332w3u2lue
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