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The Dr. Nancy K. Welker Fellowship in Proton Therapy & Advanced Radiation Modalities

Fellowship Director

Jason Kyle Molitoris, MD, PhD
Assistant Professor
Director of Advanced Modalities Fellowship Program

Program Description

The University of Maryland Department of Radiation Oncology provides advanced educational training beyond residency in a non-ACGME accredited fellowship.  The clinical fellowship is designed to develop professional competencey in the care of patients undergoing radiation therapy, with a special focus on enhancing technical skills in advanced radiation modalities. These include proton treatment at our state-of-the-art Maryland Proton Treatment Center (MPTC), thermal therapy, and training in the use of the University of Maryland–developed GammaPod™ stereotactic radiation therapy system for early-stage breast cancer.  Experience in additional advanced radiation modalities may be included. The department’s six practice sites throughout the state of Maryland offer experience with a diverse range of patients and diseases.

Scope of Training

The intended scope of training includes all areas pertaining to the diagnosis and treatment of patients with cancer.  The fellowship program emphasizes a multidisciplinary approach to the radiation treatment of disease, and the fellow will attend multidisciplinary clinics and tumor boards. Clinical time will be spent mostly at MPTC and in other practice sites as part of the training experience. Although the focus of the fellowship is clinical, the fellow will have opportunities to participate in our robust research program, inclusive of national cooperative trials, investigator-initiated studies, basic and translational research.

Length of Training

The Advanced Modalities Fellowship is a one-year program.

Number of Training Positions Available Per Year

One trainee position is available per year.

Selection Criteria

Selection of applications will be conducted by the Fellowship Program Director, with the assistance and input of the Chairman and other faculty.

Pre-Requisites for Program

  • Completion of residency training in an ACGME approved radiation oncology program
  • License to practice medicine in Maryland
  • Appropriate Visa requirements if non-U.S. citizen (ECFMG)

Applicants must be graduating residents from an ACGME or RCPSC accredited residency in radiation oncology. Applicants from the United States are expected to be board-eligible in radiation oncology at the time they begin the fellowship.  Exceptional international applicants who have completed a radiation oncology residency may be considered, depending on certification, and/or licensing status. Candidates for this position must be legally authorized to work without an employer sponsored visa. The Fellow must obtain a Maryland Physician license and Maryland Controlled and Dangerous Substance license by the start of the fellowship.  Selection criteria will be based on the following:

1) Demonstrated interest in an academic career in radiation oncology

2) Demonstrated interest in clinical/translational research in radiation oncology

3) Excellence in clinical care

How to Apply

The application process will involve a personal statement, CV, and three references (or letters of recommendation). 

If you are interested or would like more information, please contact the Education Pogram Manager, Dionna Robinson at

Current and Past Fellows

Nicola Nasser

Past Fellow:

Nicola Nasser, MD, 2020-2021

Avani Rao

Past Fellow:

Avani Rao, MD, 2019-2020

Past Fellow:

Ankur Sharma, MD, 2018-2019

Past Fellow:

Arpit Chhabra, MD, 2017-2018

Past Fellow:

Dan Kunaprayoon, MD, 2016-2017