Title: Free Isocenter Webinar
Date & Time: Thursday, March 28th, 2019 at 6:30 PM EDT
Speaker: Timothy J. Waldron, M.S. from the Medical Physics Group and Radiation Oncology Department at the University of Iowa Hospital & Clinics
Isocenter has an important place in the radiotherapy treatment room. We will discuss the meaning of isocenter, determination of its location and size its role in treatment delivery and quality assurance and relevant published guidance for management of isocenter. Don't miss this unique lecture and join us!
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Title: SGRT: The use of Surface Imaging in Radiation Oncology
Speaker: Dr. Laura Padilla
Date/Time: Wednesday, April 18th EST, 2018 at 5:00 pm EDT
Surface imaging is a technology that is becoming increasingly prevalent in radiation oncology departments. Through the use of non-ionizing radiation, surface imaging systems aid in the initial setup of patients and allow the radiotherapy team to perform continuous intra-fraction monitoring without the delivery of additional dose. While these systems have limitations, their use can improve clinical workflow and enhance patient safety and comfort. Currently, they are most commonly used for Deep Inspiration Breath Hold (DIBH) treatments of left-sided breast patients and for stereotactic radiosurgery with open masks; however, their application can be expanded well beyond these. This webinar will give an ...
You are invited to join us for a FREE webinar hosted by WePassed!
Title: The effect of CT parameter adjustment and patient size on radiation dose and image quality
Speaker: Donovan M. Bakalyar, Ph.D., FACR, Imaging Physicist in the Henry Ford Health System
Date/Time: TBD
The radiation dose absorbed by the patient during a CT scan can be estimated using a knowledge of patient body habitus and information made available by the manufacturer and confirmed by a qualified medical physicist. One must always be mindful of the balance between this dose and the radiation delivered to the CT detector assembly since it is this radiation that generates the signals required for producing the CT images. CT machine parameters under the direct control of the operator provide the opportunity for optimizing image quality while ...
This webinar will be live on Wednesday, March 21st, 2018 at 6:30 pm EST
This lecture will discuss the emerging clinical applications of MRI in radiation oncology. Topics will include MRI simulation, MRI-based dosimetry and the use of MRI in treatment planning. The potential for using MRI to evaluate the effectiveness of cancer therapy on an individual basis will also be discussed. At the end of this lecture, the attendee shall have a clear understanding of the general clinical importance and main technical issues involved in integrating MRI systems into clinical oncologic practice.
Presented by, Geoffrey D. Clarke, PhD., FACR, FAAPM, is Professor of Radiology at the University of Texas Health Science Center in San Antonio. He is also the Director of the Graduate Program in Radiological Science and the Chief of the ...
Safe implementation of SRS/SBRT programs requires an understanding of basic physics and applications of a wide-array of clinical tools: detectors, phantoms, treatment planning systems, and protocols. A significant challenge lies in the measurement of non-standard small fields associated with SRS/SBRT as many sources of error can confound such measurements, including, improper detector choice, wrong setup, scanner misalignment, etc. This challenge is made greater as new treatment planning and delivery techniques are introduced clinically often in a multi-vendor environment, where proper guidance may be lacking.
The goals of this webinar are to
Provide a comparative evaluation of small-field detectors commonly used in SRS/SBRT commissioning. Review important steps necessary for accurate beam data acquisition, data processing, data validation, and treatment plan commissioning. Discuss common pitfalls in beam data acquisition and methods of troubleshooting. Discuss the importance of comprehensive ...
Title: TPS Reference Dose Specification: Dose to Water vs. Dose to Muscle
Speaker: Vladimir Feygelman, Ph.D., Medical Physicist, Radiation Oncology Moffitt Cancer Center and Research Institute
Date/Time: Tuesday, February 27th at 5 PM EST
This Webinar provides a preview of the forthcoming Report of the AAPM working group on reference dose specification for dose calculations. The Report provides guidance on the best practice of obtaining dose-to-muscle as the final product of treatment planning, while reference linac calibration is specified in water.
Dose-to-muscle (tissue) is required by the cooperative groups. Until now, about 25% of the sites monitored by IROC Huston specify their absolute calibration in muscle, through application of the 0.99 multiplicative correction, regardless of the TPS used. The Report analyzes each commercial TPS and algorithm on a one-by-one basis and recommends when such correction ...
You are invited to join us for a live Webinar hosted by WePassed.
Title: Linac based stereotactic radiosurgery for brain tumors
Speaker: Winston (Ning) Wen, PhD, MBA
Date/Time: Tuesday, February 20, 2018, at 5:00 pm EST
Description:
Stereotactic Radiosurgery (SRS) is an effective treatment for brain metastases and other intracranial tumors. Here we will describe clinical consideration, treatment planning strategy and quality assurance of modern, LINAC-based SRS for brain tumors. We will discuss different approaches to treat single or multiple brain metastases with single-isocenter and the impact of target size modeling on the dose calculation accuracy. We will also review detectors used for small field measurement and how to establish a reference film dosimetry protocol for SRS patient specific QA.
Bio:
Winston (Ning) Wen, PhD, MBA ...
WePassed is offering another free webinar this month! Be sure to register and join us for the live event.
Title: Kilovoltage Cone-beam CT for Radiation Therapy
Speaker: Xue Dong, Ph.D
Date/Time: January 29th, 2018 at 5:00 pm EST
Description:
X-ray kilovoltage (kV) cone-beam CT (CBCT) imaging is being increasingly used in various clinical applications, mainly for its large volume coverage and hardware compatibility with open-gantry x-ray imaging system. The use of CBCT improves patient setup accuracy and also opens possibilities of CBCT-based accurate tumor delineation and therapeutic dose calculation. This webinar will cover basics of cone-beam CT physics, the applications of CBCT in image-guided radiotherapy, adaptive planning and dose calculation. A brief overview of artifact corrections in CBCT will also be presented.
Bio:
Xue Dong is a ...
Title: The Basic Physics of MRI
Speaker: Geoffrey D. Clarke, PhD.
Date/Time: Thursday, January 11th, 2018 at 5:00 pm EST
Description:
This presentation will cover the basics of NMR physics and MR image formation with special emphasis on those methods important for application in Radiation Oncology.
Topics covered include: source of the MRI signal, definition of MRI relaxation times, MRI Hardware, MR image reconstruction and Basic MRI Pulse Sequences.
Bio:
Geoffrey D. Clarke, PhD., FACR, FAAPM, is Professor of Radiology at the University of Texas Health Science Center in San Antonio. He is also the Director of the Graduate Program in Radiological Science and the Chief of the MRI Division for the Research Imaging Institute at UTSHCSA. Dr. Clarke is co-author of Bushong’s “Magnetic Resonance Imaging: Physical and Biological Principles, 4th ...
Title: MR-guidance in Radiation Therapy
Speaker: Kathryn Mittauer, Ph.D., Staff Medical Physicist at University of Wisconsin-Madison
Date/Time: Wednesday, January 17th, 2018, at 5 PM EST
Description:
With the advent of MR-integrated radiation therapy systems, there has been a significant advancement in the localization and delivery of radiation therapy. This webinar will present clinical and quality assurance aspects of an MR-guided radiotherapy (MRgRT) program. An overview of current MRgRT systems, clinical workflow, and MR-imaging capabilities will be discussed. Unique features of an MRgRT program including considerations of online adaptive radiotherapy, MR-based planning, and clinical cases will be highlighted.
Topics to be covered in this MR-guided radiotherapy (MRgRT) webinar:
MRgRT systems Workflow ...
