By Christina Ruiz,
April 06, 2019

We’d like to invite you to attend our upcoming FREE webinar:


Title: Intra-Operative Radiation Therapy (IORT)

Speaker: Michael Lometti, Msc, DABR Medical Physicist

Date/Time: Monday, April 15th at 1 pm EDT

Intra-Operative Radiation Therapy (IORT) is the use of radiation therapy in the operating room during a surgical procedure.  IORT allows for delivery of high radiation doses to a tumor while sparing skin and nearby organs at risk. The Mobetron, made by IntraOp Medical, Sunnyvale, California, is designed specifically to deliver IORT in an unshielded operating room.  This webinar will give an overview of IORT and the Mobetron and discuss the role of the physicist in implementing an IORT program, acquiring, accepting and commissioning the Mobetron and clinical use of the Mobetron.

Bio: Michael Lometti, Msc, DABR, Medical Physicist at the Department of Radiation ...

By Christina Ruiz,
March 27, 2019

You are invited to join us for a FREE Webinar hosted by WePassed!

Title:  I-131 Treatments and the Medical Physicist

Speaker: Nicole Bunda-Randall

Date Change, NOW: Friday, April 12th at 6:30 pm EDT

Bio:  Nicole Bunda-Randall completed her Bachelor of Science with a double major in Physics and Mathematics from Purdue University. She received her Masters of Science in Radiological Medical Physics at the University of Kentucky.  She specializes in therapeutic medical physics and is certified through the American Board of Radiology. She most recently started with Colorado Associates in Medical Physics (CAMP) in 2018.

As a Clinical Medical Physicist, Nicole works with various treatment units including, but not limited to, Varian 21EX, Trilogy, and TrueBeam Linear Accelerators, Varian ...

By Christina Ruiz,
March 19, 2019

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!



Thank you for your interest in the WePassed FREE Webinar Series. To gain 24/7 access the WePassed library of Webinars and other exam resources, become a WePassed subscriber at ...

By Christina Ruiz,
April 04, 2018

You are invited to join a FREE webinar hosted by WePassed!

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 ...

By Christina Ruiz,
March 26, 2018

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 ...

By Christina Ruiz,
March 19, 2018

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 ...

By Christina Ruiz,
February 26, 2018

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 ...

By Christina Ruiz,
February 16, 2018


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 ...

By Christina Ruiz,
January 19, 2018

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




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.



Winston (Ning) Wen, PhD, MBA ...

By Christina Ruiz,
January 15, 2018

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


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.



Xue Dong is a ...

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