Welcome to this year’s US SGRT Community Meeting: Your SGRT Journey!

This is the live event page for virtual attendees. No additional software is needed, apart from your browser, with javascript enabled (most are). The event will be streamed live in the window directly below- starting May 11th at 12pm ET and continuing on May 12th from 8:30 am ET. Enter the details you registered with to start the stream. If you haven’t registered, click here to sign up.

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Virtual product demos

Our Speakers

Daniel Bailey, PhD

Daniel Bailey, PhD, DABR

Daniel Bailey, PhD, DABR completed his graduate degrees and clinical residency through the Physics department at the State University of New York at Buffalo in collaboration with the Medical Physics program at the Roswell Park Cancer Institute, also in Buffalo, NY. Dan is actively involved in the AAPM, AAMD, and ABR professional organizations and is currently the Director of Physics and Dosimetry for Sarah Cannon, the Cancer Institute of HCA Healthcare. His research and clinical-improvement activities include SRS, SBRT, SGRT, quality assurance and dosimetry techniques, total body irradiation, and improving the quality and safety of the modern radiotherapy workflow.

Rachel Barlow, MIPEM, Msc, BA (Hons)

Rachel Barlow, MIPEM, Msc, BA (Hons), studied Physics at Oxford University and then joined the Royal Free Hospital in London to train as a Medical Physicist and complete her masters in radiation science. She started working in radiotherapy in 2001 and has been in her current role since 2009. Rachel supports the operational and strategic leadership of the team of 48 staff including, clinical scientists, dosimetrists and engineers across their two radiotherapy centers. She drives technical development and commissioning projects and acts as a medical physics expert across planning, QA and brachytherapy. Recently, Rachel delivered a project to install and commission 7 SGRT systems across all linacs. In her spare time, she plays the violin in a local orchestra and enjoys family cycle-rides in the local forests.

Lauren Conway, MS, RT(T)

Lauren Conway, MS, RT(T) is the Chief Radiation Therapist at Dana Farber/Brigham and Women’s Hospital Cancer Center. She is a graduate of MCPHS University holding a Bachelor’s in Science Degree in Radiation Therapy and a Master’s in Science Degree in Clinical Management. Working as a radiation therapist in a large academic center over the last years, Lauren has extensive experience with a variety of procedures and equipment. As a Lead Therapist, Lauren worked on expanding the use of AlignRT across all disease sites, including the pediatric population; most recently implementing a tattoo-less workflow for SBRT treatments. She is the recipient of the 2020 Pillars of Excellence Award in the category of Enhancing Efficiency. From 2017-2018, Lauren was a member of the ASRT Radiation Therapy Curriculum Workgroup. At her institution, Lauren started the first peer performance mentor/coach program in 2021.

Ryan Foster, PhD

Ryan Foster, PhD received his degree in experimental nuclear physics from NC State University and completed a medical physics residency at the Nebraska Medical Center, where he was an instructor from 2006-2008. Dr. Foster joined UT Southwestern Medical Center in 2008 and in 2013 was appointed Director of Clinical Medical Physics. In 2015, he joined the Levine Cancer Institute at Atrium Health in Charlotte, NC and was named the Chief Physicist at Atrium Health Cabarrus in 2017. His research interests include patient localization, normal tissue tolerance and intra-fraction motion management. Dr. Foster was named a fellow of the AAPM in 2021.

David Gladstone, Sc.D., DABMP, FAAPM

David Gladstone, Sc.D., DABMP, FAAPM, trained at the Harvard Joint Center for Radiation Therapy. He served on the Harvard faculty for five years until he took the position of Chief of Clinical Physics at Dartmouth-Hitchcock Medical Center where he served for 25 years, attaining the ranks of Professor of Medicine and Engineering.  Now focusing on the academic mission at Dartmouth Dr. Gladstone is Director of the Medical Physics Education Program at the Thayer School of Engineering and Director of Medical Physics Education and Research at the Geisel School of Medicine. Dr. Gladstone’s lab focuses on Cherenkov imaging and FLASH radiotherapy.

Mai Anh Huynh, MD, PhD

Mai Anh Huynh, MD, PhD is an Assistant Professor of Radiation Oncology at the Dana-Farber/Brigham and Women’s Cancer Center and Harvard Medical School. She is the Oligometastatic Disease Program Lead and specializes in spine and non-spine bone SBRT and MR-adaptive treatment for oligometastatic nodal and soft tissue disease. She is the Dana-Farber Cancer Institute Bone Mets Pathways Champion and member of the Harvard Radiation Oncology Program Medical Physics Executive Committee. Her current research involves optimizing patient selection and treatment for patients receiving SBRT with ablative intent, including incorporation of optical surface guidance for non-spine bone SBRT.

Guang (George) Li, PhD

Guang (George) Li, PhD is an attending physicist at Memorial Sloan Kettering Cancer Center (MSK), in charge of commissioning, clinical operation, and applications of 28+4 AlignRT systems in eight radiotherapy clinics. He has published several pioneering SGRT studies, including developing a clinical frameless brain SRS procedure using surface guidance in 2010 and optical-surface-imaging (OSI)-based spirometry in 2015. Recently, George has conducted and published several SGRT studies, including AlignRT commissioning, setup accuracy, breast DIBH, abdominal DIBH, and tattoo-less procedures. The JACMP paper on OSI accuracy of the brain and nasopharynx has been recognized as the top-cited paper in 2021-2022.

Michael MacFarlane, PhD, DABR

Michael MacFarlane, PhD, DABR, earned his Bachelor of Science degree in Mathematical Physics from the University of Waterloo, as well as a Master of Science in Clinical Medical Biophysics and a Doctor of Philosophy in Medical Biophysics from the University of Western Ontario. He then completed a medical physics residency at the University of Maryland School of Medicine where he now is an assistant professor and a board-certified medical physicist. His research focuses on improving the efficiency and quality of radiation therapy treatment planning and on the precision of radiation treatment delivery.

Miranda Murray, B.S. RT(T)

Miranda Murray, B.S. RT(T) is the lead Radiation Therapist at Northside Hospital Cancer Institute, Atlanta. She has 13 years of experience in Radiation Therapy and 9 years of experience working with SGRT with emphasis on marker less implementation. She has completed several presentations and/or lecture for professional organizations on how to become a marker less center with the use of SGRT. Northside Hospital was one of the first facilities in the Southeast to become a marker less center with the help of her innovation, research, and commitment.

Josh Naylor

Josh Naylor, MPE, MSc, DipIPEM, BSc(Hons), MIPEM, ANSHCS

Josh Naylor, MPE, MSc, DipIPEM, BSc(Hons), MIPEM, ANSHCS studied at the University of Manchester and then trained at The Christie Hospital, Manchester for two years. He moved to University Hospitals Dorset, Poole in 2011 and qualified as a registered Clinical Scientist with the HCPC. He has held senior and principal physicist roles, with a special interest in linac quality assurance and radiotherapy imaging, as well as involvement in brachytherapy, treatment planning and commissioning new equipment including SimRT / AlignRT. Josh is registered as a Medical Physics Expert with RPA2000. He was Lead Healthcare Scientist for the trust and is heavily involved in education and training of new medical physicists, completing a fellowship with Health Education England, expanding regional medical physics training.

Carmen E. Parsels, BS R.T.(R)(T)

Carmen E. Parsels, BS R.T.(R)(T), was born and raised near Columbus, Ohio. She earned a Bachelor of Science degree from The Ohio State University in Radiologic Technology in 1995; and then, in 1996 completed a certified radiation therapy program through the James Cancer Hospital and Solove Research Institute. Carmen began working for The James Cancer Hospital in 2000, and in 2011 transferred to the Stefanie Spielman Comprehensive Breast Center. She has applied to the Master of Healthcare Innovations program and hopes to begin Fall of 2023. Carmen enjoys reading, knitting, sewing, and watching true crime programs. She tries to spend as much time as possible with her two adult sons. Hawaii is her home away from home, and she hopes to travel there more. Carmen hopes to work on more innovative research projects based on her profession in the future.

David Parsons, PhD

David Parsons, PhD is an Assistant Professor and Associate Director of Medical Physics Residency Program at UT Southwestern Medical Center. He is the lead physicist for the breast disease-oriented team and surface guided radiation therapy and currently specializes in adaptive radiation therapy (ART), volumetric modulated arc therapy for total body irradiation, and stereotactic treatment planning with Gamma Pod.  His current research involves SGRT guided deep inspiration breath holds for stereotactic body irradiation, pediatric induced sedition effect, clearance mapping and cone-beam based ART.

Adi Robinson

Adi Robinson, PhD

Adi Robinson, PhD is a Senior Medical Physicist at AdventHealth in Orlando, Florida. He is the lead physicist for surface guided radiation therapy and currently specializes in multi-target stereotactic radiosurgery treatment planning with HyperArc. His current research involves SGRT for SRS and SBRTs, ROI simplification and improvements, and breath hold treatments.

Greg Swiedom, RT(T)(MR)

Greg Swiedom, RT(T)(MR), has served in the healthcare industry for 20 years in radiation therapy at UT MD Anderson Cancer Center. He assumed a leadership role as the Clinical Radiation Therapy Supervisor in 2020 and is currently leading the department’s integration of MRI disciplines with radiation therapy. He recognizes that the field of radiation therapy has evolved immensely since the start of his therapy career, and he began partnering with Vision RT to adapt the clinical practice to emerging technologies that benefit patients and staff.

Mike Tallhamer

Michael Tallhamer, DABR

Michael Tallhamer, DABR is the Chief of Radiation Physics for Centura Health based out of Denver Colorado. He has served as a guest lecturer for various academic institutions on a variety of topics including Surface Guided Radiation Therapy (SGRT), stereotactic radiosurgery, and improvements to radiation oncology quality assurance programs using methods such as statistical process control (SPC). He is a past president of the Rocky Mountain Chapter of the AAPM (RMAAPM). He trained at the Cleveland Clinic where he received his MSc in medical physics, specializing in therapeutic radiological physics. He has been commissioning and utilizing SGRT systems in his clinics since 2008 and has been able to compare them to other systems such as CyberKnife, BrainLab, Varian OGP, and several frame-based systems for SRS delivery. In addition to his clinical work, he has a background in computer vision, mathematics and image processing and serves as a physics consultant who has worked on a variety of projects in medical physics, telecommunications and satellite imaging.

Sandra M. Urrutia, BS RT(T)

Sandra M. Urrutia, BS RT(T), is a Senior Radiation Therapist at Moores Cancer Center University of California San Diego, where she has more than ten years of experience working with Surface Guided Radiation Therapy on True Beam, Halcyon and Ethos.  She enjoys the fast pace and ever-changing environment of her clinic where technology is always evolving, allowing her the best opportunity to continue to learn and grow in her profession.  Above all, providing positive experiences for her patients is what keeps her motivated.

Siqiu Wang, PhD

Siqiu Wang, PhD is a Medical Physics Resident at UT Southwestern Medical Center. She is actively involved in the development and clinical application of Surface Guided Radiation Therapy at UTSW. Her research interests include SGRT-guided clearance mapping, cone-beam based adaptive radiotherapy, and applications of artificial intelligence in radiotherapy. She wants a dog (or more) in the future.

Emmy Wells

Emmy Wells, RT(R)(T)

Emmy Wells, RT(R)(T) has been a radiation therapist for 10 years, most recently as the Lead Radiation Therapist. Her work inspirations are the patient care aspect of therapy and making connections with patients, and her team has enjoyed how efficient AlignRT has made her department.  Emmy was born and raised in Montana and loves her family, rodeoing and camping. When she is not at work, her two kids keep her busy with soccer, wrestling and basketball.

Our Sponsors


Orfit brings high precision and comfort to the positioning and immobilization of cancer patients in radiation therapy. The combination of Orfit thermoplastic masks and positioning devices provides optimal stability for daily reproducibility with limited patient movement. The Orfit solution assures patient comfort that reduces anxieties and displacement of the anatomical area of treatment. Discover the complete family of Orfit systems for brain, head and neck, supine and prone breast treatment, pelvis and abdomen treatment, SGRT, SRS, SBRT, extremities, pediatric, MR and proton therapy on www.orfit.com 


MacroMedics’ CEO, Leo de Mooy, has been actively developing products in this field for over 30 years, and played a leading role in the introduction of carbon fibre as a key material for patient positioning products.
MacroMedics has established itself as an international leader in innovation for patient positioning products for radiation oncology. Examples of this can be seen in the acclaimed Double Shell Positioning System and the Omniboard™ all in one system. Both were the first of their kind to be introduced to the market.
Our most recent innovation the Prominent ™ is the next advance in MR radiotherapy imaging and simulation for Head and Neck cancers.
Driven by the objective to help patients and therapists through innovation, MacroMedics works in cooperation with radiotherapy professionals to design, produce and distribute high-end positioning products for radiotherapy which prioritize accuracy, workflow efficiency and patient comfort.

Standard Imaging

Standard Imaging is a leading manufacturer of QA instruments for radiation-based treatments that improves patient safety and cancer treatments. Grounded in reliability and trust, they’ve dedicated more than 30 years to developing solutions that save you time, while maintaining accurate and precise results with unmatched support along the way. It’s your time. Be precise.


CDR Logo with Subtext

CDR Systems

CDR Systems is a global leader that provides radiation therapy patient positioning systems and immobilization products. Our high-precision, stereotactic-capable platforms have tailored modalities for targeted radiation therapy procedures. Dedicated to providing superior outcomes for patients and healthcare providers, we deliver the latest cutting-edge solutions to suit your needs. Whether you work for a freestanding cancer center or hospital-based provider, CDR products play a vital role in the accuracy of radiation therapy treatment.