Incorporation of gantry angle correction for 3D dose prediction in intensity-modulated radiation therapy

Journal of Radiation Research
Iori SumidaKazuhiko Ogawa

Abstract

Pretreatment dose verification with beam-by-beam analysis for intensity-modulated radiation therapy (IMRT) is commonly performed with a gantry angle of 0° using a 2D diode detector array. Any changes in multileaf collimator (MLC) position between the actual treatment gantry angle and 0° may result in deviations from the planned dose. We evaluated the effects of MLC positioning errors between the actual treatment gantry angles and nominal gantry angles. A gantry angle correction (GAC) factor was generated by performing a non-gap test at various gantry angles using an electronic portal imaging device (EPID). To convert pixel intensity to dose at the MLC abutment positions, a non-gap test was performed using an EPID and a film at 0° gantry angle. We then assessed the correlations between pixel intensities and doses. Beam-by-beam analyses for 15 prostate IMRT cases as patient-specific quality assurance were performed with a 2D diode detector array at 0° gantry angle to determine the relative dose error for each beam. The resulting relative dose error with or without GAC was added back to the original dose grid for each beam. We compared the predicted dose distributions with or without GAC for film measurements to validate GAC effec...Continue Reading

References

May 1, 1996·Medical Physics·C S ChuiT LoSasso
Aug 15, 2002·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Tom DepuydtDominique Pierre Huyskens
Sep 10, 2003·World Journal of Urology·Alan PollackRobert A Price
Oct 8, 2003·Medical Physics·Daniel A Low, James F Dempsey
Mar 9, 2005·Journal of Applied Clinical Medical Physics·Victy Y M Wong
Oct 6, 2005·Physics in Medicine and Biology·Tsang CheungPeter K N Yu
Aug 11, 2006·Medical Physics·Wei LuoChang-Ming Ma
Mar 19, 2009·Medical Physics·Slobodan DevicErvin B Podgorsak
Oct 9, 2009·Medical Physics·Eric E KleinUNKNOWN Task Group 142, American Association of Physicists in Medicine
Jul 5, 2013·Medical Physics·Heming ZhenWolfgang A Tomé
Aug 13, 2014·Radiation Oncology·James R KernsStephen F Kry

❮ Previous
Next ❯

Citations

Dec 15, 2015·Journal of Radiation Research·Keita KurosuKazuhiko Ogawa
Aug 19, 2016·Journal of Radiation Research·Iori SumidaKazuhiko Ogawa

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray

Software Mentioned

XiO
GAC

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.