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Showing 1 to 15 of 15 for “"external beam radiation therapy"”.
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In Vivo Dosimetry Using Plastic Scintillation Detectors For External Beam Radiation Therapy
… measurement of dose delivered to patients during radiation therapy, has significant potential in ensuring safe and effective treatment in radiation therapy. It can serve as point-of-delivery, patient specific quality assurance and direct verification of treatment. Despite evidence that <em>in …
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The overall survival and local control benefit of external beam radiation therapy for selected cancers
… benefits achievable with optimal access to radiotherapy in Australia are unknown. This information would be of use for planning, priority setting, and economic analysis. Methods: 5-year local control (LC) and 2-year and 5-year overall survival (OS) benefits were investigated for gynaecological, …
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Prevention of Radiation-Induced Skin Reactions in Breast Cancer External Irradiation
Radiation dermatitis is a common side effect of external beam radiation therapy. The purpose of this study was to evaluate the effectiveness of applying an aloe vera based skin gel to the target area skin in preventing the development of radiation dermatitis to postlumpectomy/ mastectomy patients …
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Segmented breast treatment planning incorporating 4D data acquisition
Conventional 3-D external beam radiation therapy for breast cancer, although a vast improvement over traditional therapy, does not take into account respiratory motion. With breast cancer patients, this motion can expose healthy tissues, such as the lungs, to higher doses than expected. More …
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Construction of a model for the improved planning of MCO-informed VMAT in RayStation using a knowledge base of clinical IMRT-MCO treatment plans
Intensity Modulated Radiation Therapy (IMRT) is a type of external beam radiation therapy that has proven effective at treating many cancers. A related therapy type, Volumetric Modulated Arc Therapy (VMAT), has the potential to provide comparable dose coverage to tumor sites while better sparing …
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An Implantable Mosfet Dosimeter Modified to Act As A Fiducial Marker
In external beam radiation therapy, it is imperative that the prescribed dose is administered to the correct location and in the correct amount. Though several ex vivo methods of quality assurance are currently employed to achieve this goal, verifying that the correct dose is received within the …
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Bias and Variability In Image-Based Volumetric Yttrium-90 Dosimetry
<p>90Y-microsphere therapy has been widely accepted as a treatment option for both primary and metastatic liver tumors where the patients are ineligible for surgical resection and external beam radiation therapy. The prognosis of untreated patient having liver cancer is very poor with life …
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Benchmarking and Implementation of A New Independent Monte Carlo Dose Calculation Quality Assurance Audit to ol For Clinical Trials
… the dose distributions a patient receives during external beam radiation therapy. Traditionally, the Radiological Physics Center has relied on measurements to assure that institutions participating in the National Cancer Institute sponsored clinical trials administer radiation in doses that are …
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Application and Development of Algebraic Reconstruction Algorithms for High Dose Rate Brachytherapy Gel Dosimetry with Optical Computed Tomography Readout
Radiation therapy treatment techniques have become more complex to offer optimal tumour control while preserving patient quality of life by avoiding damage to healthy tissue. This increased complexity requires more thorough quality assurance (QA). External beam radiation therapy has seen an …
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Feasibility of Using Stereotactic Body Radiation as an Alternative to HDR for Treatment of Cervical Cancers
Purpose: Brachytherapy is frequently used to boost volumes at risk in the treatment of cervical cancers. Not all centers have HDR, or LDR capabilities, however, all have at least a linear accelerator. The possibility of using external beam radiation therapy utilizing a Stereotactic Body Radiation …
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The role of nucleotides and the P2X7 receptor in radiation induced bystander effect
… implications for treatment related to radiotherapy is known as the bystander effect, whereby cells that have been irradiated initiate the destruction of neighbouring cells that have not been irradiated directly. The exact mechanisms that result in the bystander effect have yet to be fully …
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Reduction of Dose Calculation Errors For Patients With Metal Implants Receiving Photon Radiation Therapy
<p>Many patients receiving external beam radiation therapy have metal implants that can affect their treatment, and these metal implants can degrade the accuracy of dose calculations. Dose calculation errors result from limitations of modern dose calculation algorithms in modeling metal/tissue …
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Improving Cervical Cancer Nodal Boost Radiation Therapy By Quantifying Uncertainties and Exploring Advanced Radiation Therapy Modalities
<p>Radiation therapy for patients with intact cervical cancer is frequently delivered using primary external beam radiation therapy (EBRT) followed by two fractions of intracavitary brachytherapy (ICBT). Although the tumor is the primary radiation target, controlling microscopic disease in the …
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Mesauring The Effect Of Technological Change In Health Care Cost And Expenditure
… 4, which is focused on the two innovations in external beam radiation therapy. Of main interest is whether the incremental spending caused by new treatments grows over time. Two innovations in radiation therapy, 3D-CRT and IMRT, are examined.</p> <p><strong>Major findings and conclusions: …
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The role of tomato and lycopene consumption on prostate carcinogenesis and prostate cancer treatment
… to sustain growth despite androgen deprivation therapy (ADT). We hypothesized that tomato or lycopene products would reduce the emergence of CRPC. To test this hypothesis, TRansgenic Adenocarcinoma of the Mouse Prostate (TRAMP) mice were castrated at 12-13 weeks of age to model ADT, and the …