Our Team


Arvinder “Daisy” Uppal, M.D.

President & CEO, Radiologist

President and CEO, Charter Radiology

Dr. Arvinder “Daisy” Uppal has many roles at Charter Radiology – founder and chief executive officer, radiologist, patient advocate, and team builder. Combining her passion for radiology with her love for taking care of people, Dr. Uppal has built Charter Radiology into one of the region’s most advanced radiology practices.

Dedicated to personalizing the face of radiology to better serve patients’ needs, Dr. Uppal’s care philosophy is to treat every patient like family, a mantra she takes to heart. In addition to her well known reputation for precision and acuity in all of her radiology readings and diagnoses, Dr. Uppal is also best known by referring physicians and patients as a doctor who values personalized care above all. From the practice’s leading edge technology down to the bowls of candy placed in the patient waiting area, patients and physicians are drawn to Dr. Uppal’s undeniable radiology expertise as well as her compassionate demeanor.

“I am a scientist and a Johns-Hopkins trained physician, but what makes me different is my deep concern for the patients that I serve. Addressing people as the whole of their beings – the physical, emotional, and spiritual – defines who I am and how I care for my patients. My approach truly resonates with people,” says Dr. Uppal.

Dr. Uppal received her medical degree from Albany Medical College and completed a radiology fellowship at The Johns Hopkins Hospital. During her medical training, she was the recipient of two prestigious research awards and has authored numerous articles and presentations on advancements in radiology. She previously served as radiology chairperson at Howard County General Hospital as well as the outpatient center medical director for American Radiology Services.

Dr. Uppal founded Charter Radiology to provide the most advanced level of radiology services in a more personal environment. Her level of attention to both the patients and the physicians she works with is unique in a healthcare environment that sometimes values quantity over quality. Charter Radiology offers the most sophisticated, state-of-the-art technology including 3 Tesla wide bore scanners, which is the gold standard in imaging equipment today. In addition to the best technology, Dr. Uppal surrounds herself with the finest radiology team to offer patients an unparalleled experience.

“Yes, I have the education and credentials, my readings are accurate, and I have the very best imaging technology, but it’s the genuine concern that I have for my patients that sets Charter apart. People want great medical care from a doctor who wouldn’t treat strangers any differently than she would treat her own family. And, that’s what we deliver at Charter Radiology.”

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Sudhir Kathuria, M.D.

Diagnostic Radiology, Neuroradiology

Sudhir Kathuria, M.D. is an American Board Certified Radiologist with subspecialty CAQ certification in Neuroradiology. He received his medical degree and initial radiology training from India. He completed three years of fellowship training in Diagnostic Neuroradiology, Interventional Neuroradiology, and Advanced Neuroimaging at the University of Rochester, NY.

Dr. Kathuria has worked closely with a team of neurosurgery, neurology, and orthopedic surgeons in providing the highest quality patient care and served as Director of spine interventions and Director of advanced 320 slice CT imaging at the Johns Hopkins Hospital in Baltimore from 2008 to 2014. He twice received the Johns Hopkins Service Excellence Award and Recognition for demonstrating exemplary service excellence and for inspiring others to do their best.

Dr. Kathuria has extensively written in peer-reviewed journals and presented numerous scientific papers at national and international meetings on a wide range of topics related to diagnostic and interventional neuroradiology. His research work presentations have won various awards including “Best Scientific Exhibit Award, ASSR Annual symposium 2010” and “Summa Cum Laude Award” at ASNR annual Scientific meeting 2011.

Dr. Kathuria brings his unique clinical and academic experience to work with referring physicians in providing the best patient care at Charter Radiology.

Anton Gryaznov, M.D., Ph.D.

Anton Gryaznov, M.D., Ph.D., is a nuclear medicine physician at Charter Radiology, working closely with patients requiring PET/CT imaging. Having earned his degree in nuclear medicine with a subspecialty in molecular imaging (PET/CT) from the University of Maryland School of Medicine’s Department of Diagnostic Radiology and Nuclear Medicine, Dr. Gryaznov brings a wealth of expertise to Charter Radiology’s PET/CT and nuclear medicine program.

After earning his medical degree from Kazan State Medical University, Kazan, Russia, a top-three medical school, Dr. Gryaznov went on to pursue his Ph.D. in clinical pharmacology. He then worked as a postdoctoral fellow at Yale University in the Department of Surgery as well as a surgical resident at the Yale School of Medicine at Saint Mary’s Hospital. He went on to pursue his interest in nuclear medicine, serving as a nuclear medicine resident and chief resident in the Department of Diagnostic Radiology and Nuclear Medicine at the University of Maryland Medical Center in Baltimore, MD.

Highly focused on research, Dr. Gryaznov has been involved in multiple clinical research studies in pathology and the diagnosis and therapy of lymphomas and prostate cancer. His research has been published in several of the most prestigious surgical and nuclear medicine journals, many as primary author.

Dr. Gryaznov is a member of several professional scientific societies including the Radiology Society of North America (RSNA), Society of Nuclear Medicine and Molecular Imaging (SNMMI), and the American College of Nuclear Medicine (ACNM).


  • Medical degree – Kazan State Medical University, Kazan, Russia
  • Ph.D. – Clinical pharmacology, Kazan State Medical University
  • Postdoctoral fellow – Yale University, Department of Surgery
  • Surgical resident – Yale School of Medicine at Saint Mary’s Hospital
  • Nuclear medicine resident and chief resident – Department of Diagnostic Radiology and Nuclear Medicine, the University of Maryland Medical Center