Welcome New Faculty

Kathleen Capaccione, MD, PhD

Assistant Professor of Radiology

Dr. Kathleen M. Capaccione joined the department in the Division of Cardiothoracic Imaging in June. Her research interests include the development of novel radiopharmaceuticals for the imaging and treatment of lung cancer. She has previously published on the use of FAP targeted radiotherapy in conjunction with checkpoint inhibitor immunotherapy to increase response in melanoma and lung cancer. Her clinical research involves imaging the side effects of targeted therapy and the role of chest CT imaging in the quantitative assessment of interstitial lung disease. She teaches physics to the radiology residents and mentors students in both bench and clinical research. Her goal is to improve outcomes for cancer patients through the development of more effective molecular therapeutics with limited side effects.

Roman Fleysher, PhD

Associate Professor of Radiology (Physics)

Dr. Roman Fleysher joined our research faculty in June, 2023. His research interests include measurement principle of MRI, image quality optimization, image analysis and their applications to the study of the human brain in conjunction with cognitive, clinical, demographic, and other measurements. Dr. Fleysher received his PhD in experimental high energy elementary particle astrophysics from New York University, after which he followed his childhood dream of “developing medical equipment” and continued his education in much lower energies, those of radio waves in MRI, at the Center For Neural Science at NYU. There, he developed improved image reconstruction and distortion correction algorithms and implemented first isotropic sub-millimeter resolution imaging for functional MRI to study columnar architecture of the human visual cortex. Over the course of his career, Dr Fleysher developed methods for efficient data acquisition, its analysis and interpretation in relaxometry, B1 mapping, diffusion and perfusion, functional MRI, hyperpolarized imaging and spectroscopy. He developed novel image registration algorithms, quality and MRI-derived imaging metrics with applications in aging, mild traumatic brain injury, epilepsy in humans and rodents. He continues to work in these and other areas to enhance detection of abnormalities on MRI, beyond what was previously thought possible.

Michael L. Lipton, MD, PhD

Professor of Radiology

Dr. Michael Lipton joined the department in the Division of Neuroradiology in June, 2023. He is a neuroradiologist with a clinical focus on developing advanced quantitative MRI to enhance characterization of brain diseases. He works primarily with patients who suffer persistent symptoms related to traumatic brain injury and other disorders that are not easily identified with conventional imaging approaches. Dr. Lipton’s research program investigates brain mechanisms of neurobehavioral dysfunction due to injury and disease and how inter-individual diversity alters these mechanisms and their consequences. His research has focused for nearly two decades on detecting and characterizing the effects of concussion and repetitive subconcussive head impacts in sports. His work on the impact of “heading” on brain structure and function in amateur soccer players is funded by the Dana Foundation and the National Institutes of Health. Dr. Lipton also leads an NIH-funded study that delineates adverse brain effects of mild or asymptomatic COVID-19 in previously healthy young adults. His research has been shared internationally through presentations as well as in numerous peer-reviewed publications and books, and has been reported extensively in the press worldwide.

Mark Liszewski, MD

Associate Professor of Radiology

Dr. Mark Liszewski joined the department as chief of the Division of Pediatric Imaging and vice chair of radiology at NewYork-Presbyterian Morgan Stanley Children's Hospital in July, 2023. Prior to joining faculty at Columbia, he served as vice chair of outpatient imaging, chief of the Division of Pediatric Radiology, and an associate program director for the Radiology Residency at Montefiore Medical Center. Dr. Liszewski is a nationally recognized leader in pediatric radiology and is a frequently invited speaker and panelist at national and international conferences. He has chaired and served on multiple hospital committees and academic committees of leading radiology organizations including the American Board of Radiology and American College of Radiology. He was an assistant editor for the American Journal of Roentgenology, Pediatric Imaging Section and has been recognized with awards including the Ralph Ger Award and the Golding Scholar Award. Dr. Liszewski’s research focuses on innovations in pediatric imaging with particular interest in pediatric thoracic, gastrointestinal and vascular disease. He has also worked to develop novel bedside fluoroscopy techniques for children.

Erli Mingomataj, MD

Assistant Professor of Radiology

Dr. Erli Mingomataj joined the department in the Division of Neuroradiology in June, 2023. He earned his medical degree at the George Washington University School of Medicine and Health Sciences and completed a diagnostic radiology residency at SUNY Downstate Medical Center. He then went on to complete an Neuroradiology Fellowship with the Department of Radiology at CUIMC before joining our faculty.

Raghuram Posham, MD

Assistant Professor of Radiology

Dr. Raghuram “Ram” Posham joined the department in the Division of Interventional Radiology in July, 2023. Dr. Posham's expertise spans a broad range of minimally invasive procedures which enable him to manage and treat a wide range of conditions, from cancer care to men's and women's health. Among his clinical interests are complex portal hypertension in patients with liver disease, benign prostatic hyperplasia (BPH) in men, uterine fibroids in women, and transarterial chemo and radiation therapy for hepatocellular carcinoma patients. Dr. Posham is actively involved in academic research and has made significant contributions to the field of interventional radiology. His research interests encompass trans-radial arterial access, peripheral arterial disease interventions, and other cutting-edge topics. Through numerous peer-reviewed articles, he has enhanced the understanding and practice of interventional radiology, earning recognition for his dedication to advancing medical knowledge. His contributions to the medical community have been recognized with various honors, including the Editor's Award for Outstanding Clinical Research at the Society of Interventional Radiology (SIR) 2017 Annual Scientific Meeting and the Burton Drayer Prize in Radiology and Imaging from the Icahn School of Medicine at Mount Sinai.

Sujay Sheth, MD

Assistant Professor of Radiology

Dr. Sujay Sheth joined the department in the Division of Emergency Radiology in 2023. Dr. Sheth completed medical school as well as an MBA degree from the University of Pittsburgh School of Medicine and Katz Graduate School of Business. He completed a transitional internship at Flushing Hospital Medical Center in Queens, NY, followed by residency in diagnostic radiology at the University of Chicago. His fellowship training was completed in breast imaging at the University of California, San Francisco. Outside of clinical work, his interests in radiology include medical education, workflow optimization, and quality assurance/improvement.

Gagandeep Singh, MD

Assistant Professor of Radiology

Dr. Gagandeep Singh joined the department in the Division of Neuroradiology in June. His clinical focus includes brain tumor imaging in both adult and pediatric populations. He is deeply engaged in research with a primary focus on leveraging radiomics and deep learning methodologies to uncover non-invasive imaging markers within brain tumors that correlate with neuropathological markers and clinical outcomes. His specialization extends to advanced imaging techniques like MR perfusion, MR Spectroscopy, and functional MRI. Beyond his clinical and research acumen, Dr. Singh is a dedicated educator, actively contributing to the growth and development of medical students and residents within the NYP/CUIMC community.

Mari Tassarotti, MD

Assistant Professor of Radiology

Dr. Mari Tassarotti joined the department in the Division of Interventional Radiology in August, 2023. She treats a wide range of medical conditions that include cancer, venous disease, and men's and women's health. Some of her specific interests include the management and treatment of hepatic malignancies, uterine fibroids and pelvic congestion syndrome in women, portal hypertension, venous disease, and biliary interventions. Dr. Tassarotti completed her medical training in Integrated Interventional Radiology and Diagnostic Radiology at the Massachusetts General Hospital/Harvard Medical School in Boston, Massachusetts, where she served as a chief resident. She received her Doctor of Medicine from Georgetown University School of Medicine. Prior to her medical training, Dr. Tassarotti received a Bachelor of Arts in Human Developmental and Regenerative Biology cum laude from Harvard College with a secondary concentration in Global Health and Health Policy. Dr. Tassarotti has authored numerous research articles in medical journals ranging in topics from management of complex hepatic malignancies, pelvic venous disease, and management of deep venous thrombosis in oncologic patients.  Additionally, Dr. Tassarotti is dedicated to graduate medical education and promoting gender diversity in interventional radiology, as seen through her published articles, talks given at national conferences, and participation in the Society of Interventional Radiology.

Lindsay Young, MD

Assistant Professor of Radiology

Dr. Lindsay Young joined the department in the Division of Interventional Radiology in July, 2023. She treats a wide range of medical conditions that include cancer, arterial and venous diseases, and men's and women's health. Some of her specific interests include the management and treatment of hepatic malignancy, uterine fibroids and pelvic congestion syndrome in women, deep vein thrombosis (DVT), as well as complex portal hypertension. Dr. Young has presented her scientific research at national conferences and has authored numerous scientific research articles in national and international medical journals ranging in topics from management of complex hepatocellular carcinoma (HCC), use of liquid embolic for peripheral arterial applications, as well as radial access techniques for peripheral arterial interventions. Additionally, Dr. Young is dedicated to promoting gender diversity in interventional radiology, as seen through her published articles and participation in mentoring aspiring medical students interested in this field.