Evaluation of relative transmitted dose for a step and shoot head and neck intensity modulated radiation therapy using a scanning liquid ionization chamber electronic portal imaging device.

Journal of Medical Physics
M Mohammadi, E Bezak

Abstract

The dose delivery verification for a head and neck static intensity modulated radiation therapy (IMRT) case using a scanning liquid ionization chamber electronic portal imaging device (SLIC-EPID) was investigated. Acquired electronic portal images were firstly converted into transmitted dose maps using an in-house developed method. The dose distributions were then compared with those calculated in a virtual EPID using the Pinnacle(3) treatment planning system (TPS). Using gamma evaluation with the ΔD(max) and DTA criteria of 3%/2.54 mm, an excellent agreement was observed between transmitted dose measured using SLIC-EPID and that calculated by TPS (gamma score approximately 95%) for large MLC fields. In contrast, for several small subfields, due to SLIC-EPID image blurring, significant disagreement was found in the gamma results. Differences between EPID and TPS dose maps were also observed for several parts of the radiation subfields, when the radiation beam passed through air on the outside of tissue. The transmitted dose distributions measured using portal imagers such as SLIC-EPID can be used to verify the dose delivery to a patient. However, several aspects such as accurate calibration procedure and imager response under d...Continue Reading

References

Mar 1, 1992·Medical Physics·M van HerkH Meertens
Apr 1, 1988·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·M van Herk, H Meertens
Mar 1, 1985·Medical Physics·T R MackieJ J Battista
Dec 1, 1995·International Journal of Radiation Oncology, Biology, Physics·M EssersB J Mijnheer
Feb 1, 1995·International Journal of Radiation Oncology, Biology, Physics·M C Kirby, P C Williams
Nov 1, 1993·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·M C Kirby, P C Williams
May 1, 1996·International Journal of Radiation Oncology, Biology, Physics·A BelJ V Lebesque
May 1, 1996·Medical Physics·V N HansenW Swindell
Feb 1, 1997·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·G StübenE van der Schueren
Dec 12, 1997·Physics in Medicine and Biology·J R Symonds-TaylerP M Evans
Jun 2, 1998·International Journal of Radiation Oncology, Biology, Physics·R BoellaardB J Mijnheer
Jun 3, 1998·Medical Physics·D A LowJ A Purdy
Jul 29, 1998·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·R BoellaardB Mijnheer
Mar 3, 1999·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·M KroonwijkB J Heijmen
Dec 29, 1999·International Journal of Radiation Oncology, Biology, Physics·K L PasmaB J Heijmen
Feb 8, 2000·Physics in Medicine and Biology·J C de BoerA G Visser
Mar 17, 2000·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·R BogaertsD Huyskens
Apr 12, 2000·International Journal of Radiation Oncology, Biology, Physics·J ChangW Lutz
Jul 23, 2002·Journal of Applied Clinical Medical Physics·Kristy K BrockJames M Balter
Sep 11, 2002·Australasian Physical & Engineering Sciences in Medicine·G LiuE Bezak
Sep 24, 2002·International Journal of Radiation Oncology, Biology, Physics·Robert S J P KaateeBen J M Heijmen
Aug 9, 2003·Medical Physics·Geetha V Menon, Ron S Sloboda
Mar 17, 2004·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Geetha V Menon, Ron S Sloboda
Apr 28, 2004·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Ann Van EschDominique Pierre Huyskens
Jul 1, 1994·Physics in Medicine and Biology·D HuyskensA Dutreix
Aug 27, 2005·Neurobiology of Learning and Memory·Renee A CountrymanPaul J Colombo
Nov 4, 2005·Medical Physics·W J C van ElmptA W H Minken
Apr 21, 2006·Australasian Physical & Engineering Sciences in Medicine·P ReichL Fog
May 26, 2006·Physics in Medicine and Biology·Mohammad Mohammadi, Eva Bezak
Jul 19, 2006·Australasian Physical & Engineering Sciences in Medicine·M MohammadiP Reich
Aug 11, 2006·Medical Physics·Wouter J C van ElmptAndré W H Minken
Dec 22, 2006·Physics in Medicine and Biology·Mohammad Mohammadi, Eva Bezak
Jun 28, 2008·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Mohammad MohammadiPaul Reich
Jul 25, 2008·Medical Physics·Maria Mamalui-HunterDaniel A Low
Nov 18, 2008·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Joan PenninkhofMaarten Dirkx
May 14, 2009·Physics in Medicine and Biology·Tina Marie BriereSunil Krishnan

❮ Previous
Next ❯

Citations

Jan 8, 2013·Journal of Medical Physics·Mohammad MohammadiThomas P Rutten

❮ Previous
Next ❯

Software Mentioned

MATLAB
Pinnacle
EPID
PortalVision
SLIC

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
M MohammadiPaul Reich
Australasian Physical & Engineering Sciences in Medicine
Paul ReichL Fog
Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
W J C van ElmptBen J Mijnheer
© 2022 Meta ULC. All rights reserved