ARRS Roentgen Fund Grants Research Awards to Four In-Training Radiologists

Leesburg, VA, March 12, 2025—The American Roentgen Ray Society (ARRS) proudly recognizes the following four radiologists and their research projects with the 2025 ARRS Resident/Fellow in Radiology Awards:

Shadi Ebrahimian, MD
Resident/Fellow in Radiology Executive Council Award
“Evaluating AI Performance in Large Vessel Occlusion Detection: Impact on Time-to-Thrombectomy and Clinical Workflow Efficiency”

Ariel S. Kniss, MD, PhD
Resident/Fellow in Radiology Executive Council Award
“Mammographic Breast Density and Its Impact on Screening Performance Metrics: An Analysis of 489,439 Screening Mammograms”

Capt. Tej Mehta, MD
Resident/Fellow in Radiology Melissa Rosado de Christenson Award
“Multiparametric, Multimodal Delta-Radiomics for the Prediction of Transarterial Chemoembolization Outcomes in Hepatocellular Carcinoma”

Jordan H. Chamberlin, MD
Resident/Fellow in Radiology President’s Award
“Machine Learning Based Optimization of Root Factors Associated with Image Quality of Myocardial Late Iodine Enhancement”

Supported by The Roentgen Fund®, the ARRS Resident/Fellow in Radiology Awards are available to all ARRS In-Training Members in imaging and allied sciences research to acknowledge their work and present their results during the ARRS Annual Meeting. ARRS Resident/Fellow in Radiology Awards are based on the competence and promise of the candidate in radiological research, education, or administration and the scientific merit and potential impact of the candidate’s research.

Since 1990, The Roentgen Fund has granted millions of dollars to hundreds of imaging professionals for both research pursuits and professional development. Today, through six vital scholarship and fellowship programs, the generosity of The Roentgen Fund’s donors is channeled to every corner of the globe—establishing dual foundations in innovation and leadership for a true diversity of radiology’s next generation.

Drs. Ebrahimian, Kniss, Mehta, and Chamberlin will present their research findings during the 2026 ARRS Annual Meeting in Pittsburgh, PA.

Shadi Ebrahimian, MD, is a second-year radiology resident at Yale New Haven Hospital. After graduating from medical school, she pursued a postdoctoral research fellowship in the department of radiology at Massachusetts General Hospital, where she contributed to multiple projects focused on developing and validating artificial intelligence (AI) algorithms. Additionally, Dr. Ebrahimian was involved in various local and international studies on quality control and CT radiation dose optimization. As a radiology resident, she remained actively engaged in research, primarily focused on AI applications in radiology and exploring new areas in evidence-based diagnostic and clinical decision-making frameworks. Dr. Ebrahimian’s research journey began early in her medical career, leading to the publication of over 40 papers in peer-reviewed journals and numerous presentations at scientific meetings. Her work has also been recognized with awards from societies such as the Association of Academic Radiology and Society of Thoracic Radiology. As a future radiologist, she strives to apply her research and clinical experience to contribute to advancements in imaging and diagnostics, while continuously learning and improving in the field.

Ariel S. Kniss, MD, PhD, is a fourth-year diagnostic radiology resident at Massachusetts General Hospital (MGH). After undergraduate studies in mathematics and biology, she completed her PhD in biomedical engineering at Georgia Tech, where she was awarded a National Science Foundation Graduate Research Fellowship. Dr. Kniss attended Vanderbilt University School of Medicine in Nashville, TN, where she stayed for an intern year in general surgery at Vanderbilt University Medical Center. Recently serving as a chief resident at MGH, Dr. Kniss was awarded the Walter James Dodd, MD, Pioneer Radiologist Award.  Her research interests include combining mathematics, engineering, and radiology to further advance breast imaging research. She will start a breast imaging fellowship at MGH in July 2025.

Capt. Tej Mehta, MD, is the chief resident for interventional radiology and residency research director at the Johns Hopkins Hospital. His significant contributions span clinical care, research, and education, which has been recognized by a multitude of awards and publications. Capt. Mehta’s recent work focuses specifically on developing machine learning algorithms for early prediction of treatment outcomes in interventional oncology. He holds an MD with a certificate in bioethics from the University of South Dakota and a bachelor of science in biochemistry from the University of Wisconsin. He also holds an advanced certificate in AI imaging from the Radiological Society of North America. His academic journey is complemented by a robust portfolio of publications and presentations, reflecting his dedication to advancing the field of radiology. In addition to his medical accomplishments, Capt. Mehta is a decorated officer in the United States Air Force, embodying leadership and innovation in both civilian and military spheres. His work exemplifies excellence in patient care, research, and advocacy for advancing health care technologies.

Jordan H. Chamberlin, MD, is a PGY-3 diagnostic radiology resident at the Medical University of South Carolina in Charleston, where he also completed his undergraduate medical education. Drawing from his background in drug discovery and informatics at Clemson University, he became involved with the cardiothoracic imaging department and developed a focus on clinical implementation of machine learning algorithms and practical quantitative imaging analysis in cardiovascular imaging. Some of Dr. Chamberlin’s notable published works include applications of dual-energy and photon-counting CT in cardiothoracic imaging, utility of quantitative parametric mapping in cardiac sarcoidosis, and clinical evaluation of machine learning in lung cancer screening and coronary calcium scoring. Dr. Chamberlin has previously received awards from the Society of Advanced Body Imaging and Applied Radiology and serves as a trainee editorial board member for Radiology: Cardiothoracic Imaging. Dr. Chamberlin plans to pursue a fellowship in cardiothoracic imaging and looks forward to advancing both the clinical and translational elements of quantitative imaging in his future practice.

An application call for the 2026 ARRS Resident/Fellow in Radiology Awards will be announced later this year.

North America’s first radiological society, the American Roentgen Ray Society (ARRS) remains dedicated to the advancement of medicine through the profession of medical imaging and its allied sciences. An international forum for progress in radiology since the discovery of the x-ray, ARRS maintains its mission of improving health through a community committed to advancing knowledge and skills with the ARRS Annual Meeting, two radiology journals—American Journal of Roentgenology (AJR) and Roentgen Ray Review (R3)—InPractice magazine, ARRS Symposia, free-access multimedia from our Global Partner Societies, as well as awarding scholarships via The Roentgen Fund®.

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