Chartrounds Brachytherapy specialists 

Sushil Beriwal, MD, MBA
Professor of Radiation Oncology
University of Pittsburgh School of Medicine

Areas of expertise: GYN brachytherapy; Prostate brachytherapy

Sushil Beriwal, MD, MBA is professor of radiation oncology and residency program director at the University of Pittsburgh School of Medicine. He specializes in breast, gynecological and prostate cancer and has published over 250 articles in major medical journals and served on editorial boards and review panels for multiple international and national scientific journals. His primary focus is image based brachytherapy and promotes use of brachytherapy through research and education. He has been very active in various education courses organized by ABS, ASTRO and ACRO.

Kristin Bradley, MD

Professor of Radiation Oncology
University of Wisconsin Department of Human Oncology

Areas of expertise: GYN brachytherapy

I am a professor of radiation oncology in the Department of Human Oncology. In my clinical practice, I specialize in treating patients with gynecologic, hematologic and pediatric malignancies. I have a very busy brachytherapy practice. I work closely with gynecologic oncologists, hematologists, pediatric oncologists, radiologists and other specialists to best meet my individual patients’ needs.

In addition to my clinical practice, I am the Radiation Oncology Residency Program director. I also am involved with teaching medical students and undergraduates. Fellows from gynecologic oncology and pediatric oncology work with me on clinical rotations yearly.

I perform clinical research, primarily in the area of gynecologic radiation oncology, but I also have served as the principal investigator for a Children’s Oncology Group study on pediatric pontine gliomas.

Steven J Frank, MD
Professor of Radiation Oncology
MD Anderson Cancer Center

Areas of expertise: Prostate brachytherapy

Dr. Frank is an endowed tenured professor of Radiation Oncology at The University of Texas MD Anderson Cancer Center, the Medical Director of MD Anderson’s Proton Therapy Center, and leader of both the Proton Therapy Program for head and neck cancer and the Prostate Brachytherapy Program. Dr. Frank also serves the Division as Director of Advanced Technologies in Radiation Oncology; he is amongst the first, if not the first, to use Intensity-Modulated Proton Therapy (IMPT) to treat head and neck tumors. Dr. Frank is the Principal Investigator of an NIH/NCI-sponsored Phase II/III randomized trial in oropharyngeal cancer that compares outcomes after chemoradiation given by IMRT versus IMPT. His other major clinical research accomplishment includes the successful accrual of 300 patients in a Phase II protocol for prostate cancer. Dr. Frank’s expertise in MRI radiotherapy has led to the development and FDA approval of a novel positive-contrast implantable marker for use in MRI-guided prostate brachytherapy. As founder of the company, C4 Imaging, Dr. Frank has developed the MRI marker technology at MD Anderson, currently holds 31 national and international patents and has continued MRI-Assisted Radiosurgery (MARS) at MD Anderson for the treatment of prostate cancer. He has funding from the NIH, the Prostate Cancer Foundation, the Texas Ignition Fund, Hitachi and MD Anderson, and he has also raised three rounds of private equity financing to advance C4 technology. Dr. Frank’s expertise in prostate brachytherapy is reflected by his service as past President and Chairman of the Board of the American Brachytherapy Society. Dr. Frank's expertise in head and neck cancer has been acknowledged by his chairing the American Board of Radiology’s Oral Examinations Program for head and neck cancer.

David Gaffney, MD, PhD
Vice Chair and Professor of Radiation Oncology at the University of Utah
Senior Director for Clinical Research at the Huntsman Cancer Institute

Areas of expertise: GYN brachytherapy

David Gaffney's main research interests are in clinical trial development, prognostic markers, radiation sensitizers, and secondary cancers. He is an active clinician and specializes in the radiotherapeutic management of gynecological cancers, breast cancers, and lymphoma. Dr. Gaffney is interested in clinical trials that improve survival and quality of life for cancer patients. He serves as a co-Chair for the National Cancer Institute Gynecologic Cancer Steering Committee and previously was chair of the Gynecologic Working Group for the Radiation Therapy Oncology Group (RTOG). He is a past chair of the American Brachytherapy Society and the Cervix Cancer Research Network. He is active in the Gynecologic Cancer Intergroup, a worldwide organization of clinical trial groups. He also chairs the Clinical Research Executive Committee at the Huntsman Cancer Institute and serves as a Senior Editor for the International Journal of Gynecologic Cancer, Gynecologic Oncology, and the American Journal of Clinical Oncology, and Brachytherapy.

Peter Rossi, MD
Radiation Oncologist
Calaway-Young Cancer Center
Valley View Hospital, Glenwood Springs, CO

Areas of expertise: Prostate brachytherapy

I have a comprehensive and active clinic in Radiation Oncology at the Calaway-Young Cancer Center at Valley View, specializing in the multi-disciplinary daily management of cancer patients with a broad range of malignancies. I have expertise in innovative technologies, brachytherapy, radiopharmaceuticals, advanced external beam radiotherapy, clinical research and integrative oncology. To best serve our patients, I work closely with medical oncology and surgical oncology colleagues. My primary research focuses are genitourinary cancers and advanced and innovative technologies, including: LDR and HDR brachytherapy, stereotactic body radiotherapy (SBRT) and radiosurgery (SRS).  Additionally, I study the quality of life in cancer survivors, with a focus of improving the side effect profile of treatment. I am a board member of the American Brachytherapy Society (ABS) and past Chairman of corporate relations committee and corporate advisory board for the American Society for Radiation Oncology (ASTRO).


Timothy Showalter, MD, MPH
Associate Professor of Radiation Oncology
University of Virginia School of Medicine

Areas of expertise: GYN brachytherapy; Prostate brachytherapy

Clinical Interests
Dr. Showalter provides radiation treatment for patients with genitourinary, gynecologic, pediatric, melanoma and sarcoma cancers. His practice involves advanced external beam radiation therapy techniques, such as intensity-modulated radiation therapy (IMRT), image-guide radiation therapy, image-guided brachytherapy, prostate seed implants and stereotactic body radiation therapy.

Research Interests
As a clinical researcher, Dr. Showalter is focused on improving outcomes for patients with high-risk prostate cancer, developing more effective and convenient radiation therapy schedules, and evaluating advanced technologies for brachytherapy and external beam radiation therapy. Dr. Showalter’s research has resulted in multiple peer-reviewed publications and presentations at national meetings, and he is the recipient of a Young Investigator Award from the Prostate Cancer Foundation to support his career development as a prostate cancer researcher.  He was a faculty member at Thomas Jefferson University in Philadelphia prior to his start at UVA in August 2012.

He is a native of Richmond, Virginia, and lives in Charlottesville with his wife and three children.

•Board Member, American Brachytherapy Society
•Chair, Cancer Center Protocol Review Committee
•Chair, Patient Safety Committee, American Brachytherapy Society
•Member, GU Cancers Committee and Patient Centered Outcomes Research Committee, NRG Oncology

M.P.H., 2015, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD
M.D., 2004, University of Virginia School of Medicine, Charlottesville, VA
B.A., 2000, Chemistry, Washington and Lee University, Lexington, VA

Thomas Jefferson University Hospital, Philadelphia, PA

American Board of Radiology (Radiation Oncology), May 2010

Catheryn Yashar, MD, FACRO, FABS, FACR, FASTRO
Professor and Assistant Vice Chair
Department of Radiation Oncology and Applied Sciences
University of California San Diego School of Medicine

Areas of expertise: Breast brachytherapy; GYN brachytherapy

Dr. Catheryn Yashar is a Professor and Assistant Vice-Chair of Clinical Affairs. She is Chief of the Breast Cancer Section and a member of the Gynecologic Cancer Treatment Team. She is also Chief of Staff of the UC San Diego Medical Center.

An internationally-recognized radiation oncologist in the treatment of breast and gynecologic cancers, Dr. Yashar has a particular expertise in the use of novel brachytherapy approaches in these disease sites. She is on the Board of Chancellors of the American College of Radiation Oncology (ACRO) and is a past President of the American Brachytherapy Society (ABS). She is the Senior Editor (Gynecologic Cancers) for Gynecology for Advances, and an Gynecologic Cancer Editor of the on-line journal Up-to-Date. She is also an Editor of the Principles and Practice of Gynecologic Oncology, the premier textbook in Gynecologic Oncology. She has published over 100 journal articles, reviews and book chapters, focused on gynecologic malignancies, breast cancer and brachytherapy.

Dr. Yashar serves on multiple Medical School and Hospital Committees, having chaired the Medical School Curriculum Committee, the Moores Cancer Committee, the Credentialing Committee and the Council on Education Policy. A frequent invited speaker at national and international cancer symposia, she has been named a Top Doctor by the San Diego Magazine multiple times. She has been named a fellow of the American College of Radiation Oncology (ACRO), American Brachytherapy Society (ABS), American College of Radiology (ACR) and the American Society of Radiation Oncology (ASTRO).