Leadership

Dennis Kay, MD, FACR, FSIR - Chairman/System Chief

Dennis Kay, MD, FACR, FSIR
Dr. Kay has been Chairman of Radiology at Ochsner since 2007. He is a graduate of Tulane Medical School and performed his Vascular and Interventional fellowship at the Harvard Medical School/Beth Israel Program. Dr. Kay has been on the Board of Directors of the Ochsner Clinic for 9 years, and he has served many roles in the ACR such as former chapter president and LA state councilor. His research interests include interventional treatments for liver tumors. Dr. Kay is a former Ochsner resident.


James Milburn, MD, FACR - Vice Chairman and Program Director

James Milburn, MD, FACR
Dr. Milburn is the Vice Chairman of Academic Affairs for the Ochsner Radiology Department, where he has been Residency Program Director since 2003. Dr. Milburn received fellowship training in diagnostic and interventional neuroradiology at the Mallinckrodt Institute following his radiology residency training at Ochsner. As the Section Head of Neuroradiology and senior neurointerventionalist, Dr. Milburn is an integral part of the highly ranked Neuroscience Center of Excellence at Ochsner. As a Program Director, Dr. Milburn cultivates a collegial atmosphere in the department while motivating residents to become successful. Dr. Milburn is an active researcher, and his primary academic interests relate to stroke and brain aneurysm treatment, neuroimaging, and resident education. He is a member of multiple national boards and committees, and he serves as Councilor for the Louisiana chapter of the ACR.


Dana Smetherman, MD, MPH, FACR - Vice Chairman

Dana Smetherman, MD, MPH, FACR
Dana Smetherman, MD, MPH, FACR is the Vice Chair for the Department of Radiology at Ochsner Medical Center Jefferson Highway and for the Radiology Service Line and serves as the Section Head for Breast Imaging. Dr. Smetherman serves as a physician director on the Ochsner Health System Board of Directors and is a member of the Board of the National Accreditation Program for Breast Centers (NAPBC). She is also currently the Chair of the Breast Economics Committee of the American College of Radiology and Vice Chair for the ACR’s Breast Commission. Dr. Smetherman has authored or coauthored multiple papers published in peer-reviewed scientific and educational journals. She has also given numerous presentations at scientific meetings nationwide on breast imaging, health care economics, quality improvement, and ultrasound.


Juan Gimenez, MD - Associate Program Director

Juan Gimenez, MD
Dr. Gimenez is an interventional radiologist and also Associate Program Director of the radiology residency. Dr. Gimenez received fellowship training in IR at the University of Miami following his radiology residency at Ochsner. As APD, Dr. Gimenez not only helps residents develop radiology skills, but he also helps them grow academically through research. His primary academic interests relate to interventional oncology, liver directed therapies, and resident education. He is a member of multiple professional societies and committees.


Faculty & Staff

Francine Belleville, MD

Francine Belleville, MD
Dr. Belleville received her medical education at Laval University, Quebec Canada. She is a former Ochsner resident. Dr. Belleville is certified by both the American Board of Radiology and the Royal College of Physicians and Surgeons of Canada. She also trained and worked in Family Medicine prior to her radiology residency. Dr. Belleville specializes in general diagnostic radiology and MRI. Her area of interest is Women’s Imaging. In addition to working with the residents in MRI on Ochsner’s Main Campus, Dr. Belleville covers several of Ochsner’s community hospitals.


Edward Bluth, MD, FACR

Edward Bluth, MD, FACR
Dr. Bluth graduated cum laude from the University of Pennsylvania with special distinction in History. He earned his medical degree from the State University of New York Downstate Medical Center, completed his internship at the Medical College of Virginia, and his residency at the Hospital of Pennsylvania. He has been on the staff since 1977. In the past he has been a member of the Board of Governors and Board of Directors. Dr. Bluth is also a Clinical Professor of Radiology at Tulane University School of Medicine and Professor of Radiology of Ochsner Queensland Medical School. He is very active in numerous medical societies. He just completed a 6 year term on the Board of Chancellors of the American College of Radiology as Chairman of the Commission on Human Resources. He is a member of the American College of Radiology Delegation to the American Medical Association. He's been President of the New Orleans Radiology Society and Radiologic Society of Louisiana. Dr. Bluth is an active researcher and has published over 185 peer-reviewed articles and chapters. He is author of 12 textbooks and serves on several editorial boards.


Erica Broussard, MD

Erica Broussard, MD
Dr. Erica Broussard earned her medical degree from Meharry Medical College, Nashville, TN. Following graduation, she completed an internship at the Walter Reed Army Medical Center. She then completed a residency at the National Capital Consortium Program at Walter Reed Army Medical Center and Bethesda Naval Medical Center. Dr. Broussard specializes in Women’s Imaging at Ochsner.


Dan DeVun, MD

Dan DeVun, MD
Dr. DeVun earned his medical degree from LSU and completed his internship and residency at Ochsner before completing an angio/interventional radiology fellowship the University of California at Irvine. An active researcher, he has several scientific publications and presentations to his credit. Special interests include interventional oncology and removable IVC filters.


Nancy “Lisa” Diethelm, MD

Nancy “Lisa” Diethelm, MD
Dr. Diethelm is a thoracic and cardiac radiologist, having completed dedicated fellowships in each area. She is the radiology consultant for the weekly multidisciplinary Thoracic Oncology conference, a collaborative effort with Thoracic Surgery, Pulmonary Medicine, Oncology, Radiation Oncology and Pathology. Dr. Diethelm also consults with cardiac and thoracic surgeons, pulmonologists, interventional cardiologists and cardiology imagers the role of CT in supplement to MRI, angiography and bronchoscopy. She is primarily interested in CT imaging of thoracic and cardiac structures. Specific interests include: Innovative CT protocols for x-ray dose reduction and for data reconstruction to improve display of thoracic and cardiac structures and diseases, congenital and acquired cardiac, airways and pulmonary diseases. Respiratory variation effect on imaging detection of airways disease. Effects of immunosuppression on intrathoracic disease expression including iatrogenic immunosuppression and AIDS. She has served for 6 years on the Scientific Sessions committee of the Radiologic Society of North America in the cardiac imaging section.


Noah Emerson, MD

Noah Emerson, MD
Dr. Emerson graduated cum laude from Loyola University, New Orleans with a degree in Chemistry. Prior to starting medical school, he spent a year conducting research at the University of California, San Francisco Medical Center. Dr. Emerson graduated from Midwestern University with a degree in Osteopathic Medicine. He went on to complete an internship and radiology residency at Illinois Masonic Medical Center in Chicago. Dr. Emerson completed his fellowship training in neuroradiology at Northwestern University. Dr. Emerson has a special interest in Neuroradiology.


Jessica Galandak, MD, MPH

Jessica Galandak, MD, MPH
Dr. Jessica Galandak received a Master of Science degree in Public Health and a Doctor of Medicine degree from Tulane University School of Medicine located in New Orleans, LA. She then completed an Internal Medicine Internship with Tulane University and a Diagnostic Radiology Residency with the Ochsner Clinic Foundation. Dr. Galandak went on to pursue additional fellowship training in breast and body imaging at Columbia University in New York, NY. Following fellowship, she accepted a position as Assistant Professor of Radiology at the University of Maryland School of Medicine, specializing in breast imaging and intervention. She returned to the Ochsner team, where she continues her focus on breast disease in addition to providing general radiology services. Dr. Galandak is an active member of the Society of Breast Imaging.


Jason Giardina, MD, PhD

Jason Giardina, MD, PhD
Dr. Giardina is the section head of the emergency radiology section at Ochsner main campus, working closely with residents on their ER rotations. He graduated medical school from Louisiana State University New Orleans 2007, completed diagnostic radiology residency at Ochsner in 2012, and then finished his abdominal imaging fellowship at University of Alabama at Birmingham in 2013. Dr. Giardina has been on staff at Ochsner since 2013.


Patrick Gilbert, MD

Patrick Gilbert, MD
Dr. Gilbert was born and raised in Thibodaux, LA. After graduation from Tulane Medical School, he performed Radiology residency and Vascular/Interventional Radiology fellowship at the Medical University of South Carolina. His published interests include challenging arterial and venous access, particularly radial artery access for uterine and oncologic interventions, and percutaneous ablation therapies. He is an Interventional Radiologist at Ochsner, actively supporting tumor boards at the Jefferson Highway and the Baptist campuses. He is a member of the SIR and RSNA.


Carlos Gimenez, MD

Carlos Gimenez, MD
Born and raised in Argentina, Carlos Gimenez moved to the United States in December of 2000. He finished medical school at LSU New Orleans in 2010 and a radiology residency at Ochsner in 2016. Dr Gimenez completed his MRI/MSK fellowship at Ochsner Clinic the following year. His main interests are musculoskeletal and sports related imaging. His a member of the Skeletal Society of Radiology and American College of Radiology.


Paul Gulotta, MD

Paul Gulotta, MD
Dr. Gulotta received his Doctor of Medicine degree from Louisiana State University School of Medicine in New Orleans, LA. In addition, he completed a Diagnostic Radiology Residency at Ochsner Clinic Foundation in New Orleans, LA followed by an Interventional Radiology Fellowship from the University of Alabama at Birmingham. He also performed an Interventional Neuroradiology Fellowship at Ochsner. Dr. Gulotta is a member of the following professional organizations: American College of Radiology, Radiological Society of North America, American Medical Association and the Louisiana State Medical Society.


Vandon Habetz, MD

Vandon Habetz, MD
Dr. Habetz received his medical degree from Louisiana State University School of Medicine in New Orleans, LA. He completed an internship at Ochsner Clinic Foundation in Internal Medicine and his residency at Ochsner Diagnostic Radiology. Following residency, Dr. Habetz performed a fellowship in MRI/Body Imaging at Ochsner.


Cara Irwine, MD

Cara Irwine, MD
Dr. Cara Irwine graduated from the Florida State University College of Medicine in 2010. She completed her diagnostic radiology at Ochsner in 2015, followed by a fellowship in neuroradiology at the University of Alabama at Birmingham in 2016. Dr. Irwine is a member of the American College of Radiology, the American Society of Neuroradiology and American Society of Head and Neck Radiology. Dr. Irwine has been on staff as a member of the emergency radiology section since 2016.


Matthew Irwine, MD

Matthew Irwine, MD
Dr. Matthew Irwine graduated from the Florida State University College of Medicine in 2010. He completed his diagnostic radiology residency at Ochsner in 2015, during which he served as chief resident. He completed a fellowship in musculoskeletal radiology at the University of Alabama at Birmingham in 2016. His interests include musculoskeletal ultrasound and sports medicine imaging. Dr. Irwine is a member of the American College of Radiology and RSNA. He has been on staff as a member of the emergency radiology section since 2016.


Stephen Johnson, MD

Stephen Johnson, MD
Dr. Johnson is the section head of the ultrasound department at Ochsner main campus. Born and raised in New Orleans, he graduated medical school from Louisiana State University New Orleans in 2009 and completed residency in diagnostic radiology at Ochsner in 2014. He finished fellowship in abdominal imaging at Johns Hopkins Hospital in 2015 and he is currently a section head in the Ochsner Ultrasound Department. His clinical areas of interest include transplant imaging and ultrasound-guided procedures. Dr. Johnson is a consultant at the multidisciplinary transplant conference, the endocrine conference, and the colorectal surgery conference. He serves on the American College of Radiology Committee on Practice Parameters and Technical Standards and is an active member of Society of Abdominal Radiology, Society of Radiologists in Ultrasound, and American Institute of Ultrasound in Medicine.


John A. Kalmar, MD

John A. Kalmar, MD
A native of Hungary, Dr. Kalmar graduated summa cum laude from the Semmelweis Medical School of Budapest. After serving as a Clinical Instructor and Assistant Professor of Radiology at Semmelweis Medical School of Budapest, he completed his internship and residency training in Sweden at Sabbatsberg, Lowenstromska and Danderyds Hospitals as well as the Psychiatric Hospital of Beckomberga. He also completed a radiology residency at Ochsner, where he served as Chief Resident. He has been on staff at Ochsner since 1978. He is a Clinical Professor of Radiology at Tulane University Medical School. Among his numerous professional obligations, Dr. Kalmar has served as the Chairman of the Radiology Section of the Southern Medical Association. Dr. Kalmar speaks Swedish, French and Hungarian and reads German and Russian. He is also a former World Champion and an Olympic Bronze Medal Medal winner in Saber Fencing and an International and Olympic Fencing Judge for the USA.


Arthur Kenney, MD

Arthur Kenney, MD
Dr. Kenney earned his medical degree from State University of New York Health Science Center at Syracuse. He is fellowship trained in both pediatric radiology and clinical MRI. Areas of interest include fetal MRI, pediatric MRI, pediatric oncologic imaging and most recently molecular imaging, particularly positron emitters.


Neil Lall, MD

Neil Lall, MD
Dr. Neil Lall earned a Doctor of Medicine degree from the Ohio State University College of Medicine located in Columbus, OH. He then completed a Preliminary Medicine Internship followed by a Diagnostic Radiology Residency with the Ochsner Clinic Foundation. He later completed a Pediatric Radiology Fellowship at Cincinnati Children’s Hospital Medical Center and a Diagnostic Neuroradiology Fellowship at the University of Colorado.


Todd Layman, MD

Todd Layman, MD
Dr. Todd Layman has over 10 years of experience covering all imaging modalities. He earned his MD from LSU Medical School in New Orleans. He completed a 5 year radiology residency at Virginia Mason Medical Center in Seattle, WA. In his final year, he had the honor of serving as Chief Resident. An additional 1 year Fellowship in MRI was completed at Ochsner Medical Center. The academic title of Senior Lecturer of Ochsner Clinical School at University Of Queensland is also maintained. Dr. Layman particularly enjoys working with residents.


Dee Malkerneker

Dee Malkerneker
Dr. Malkerneker is the Section Head of West Bank Radiology for Ochsner. She specializes in both interventional radiology and nuclear medicine, working both at the West Bank and at the Main Campus. Dr. Malkerneker is a reviewer for the Journal of Vascular and Interventional Radiology.


Charles C. Matthews

Charles C. Matthews
Dr. Matthews attended Stanford University for his undergraduate education. He then attended Tulane University School of Medicine, graduating with AOA Honors. All of his post graduate training has been completed at Ochsner Medical Foundation. After an internship year in internal medicine, he completed a residency in diagnostic radiology, serving as chief resident his last year. He then completed a fellowship in Ultrasound and Computed Tomography. Dr. Matthews has been extensively involved in the residency training his entire career and has won the Teacher of the Year honor several times. He is a member of the Program Evaluation Committee and has interviewed over one thousand medical students for the residency matching program. He has been the faculty mentor for many residents through the years. Dr. Matthews is a member of several other Radiology Department Committees and is the head of the CT section. His primary areas of academic interest and practice are Thoracic Radiology and Body Imaging with CT. Dr. Matthews has many publications to his credit, including journal articles, case reports, and book chapters. He has also been an invited speaker at regional and national meetings.


George Mayhall, MD

George Mayhall, MD
Dr. Mayhall earned his medical degree from Louisiana State University School of Medicine in New Orleans and completed his internship and diagnostic radiology residency at the University of Tennessee/Methodist Healthcare in Memphis, TN. He completed a fellowship in abdominal imaging at Emory University in Atlanta, GA. His clinical interests include abdominal imaging and emergency radiology. He is a member of the American College of Radiology, Radiological Society of North America, and American Roentgen Ray Society. He has been on the Ochsner staff since 2017.


Anthony Modica, MD

Anthony Modica, MD
Dr. Modica is an experienced fellowship trained pediatric radiologist. His current focus is emergency radiology, and he works closely with radiology residents on the evening and night ER rotation. Dr. Modica is a former Ochsner radiology resident.


Oussama Nachar, MD, Ph.D.

Oussama Nachar, MD, Ph.D.
Dr. Nachar earned his medical degree from the Universite Laval in Quebec, Canada, and his PhD in radiobiology at the Universite of Sherbrooke where he also completed his Nuclear Medicine Residency, and PET fellowship. Dr. Nachar has been on staff at Ochsner since the spring of 2001. Dr. Oussama Nachar is a in nuclear medicine specialist with an expertise in PET-CT, certified in Quebec by the 'College des Medecins du Quebec', in Canada by the Royal College of Physicians (FRCP) and in the United States by the American board of Nuclear Medicine (ABNM). After his fellowship studies, Dr. Nachar has occupied a staff position at the University of Texas UT-Southwestern, in Dallas, Texas. Subsequently, he was appointed as a Nuclear Medicine professor at the Medical College of Virginia in Richmond, Virginia. He is currently the section head of the department of Nuclear Medicine and PET-CT at the Ochsner Health System.


Kwaku Obeng, MD

Kwaku Obeng, MD
Dr. Obeng is currently part of the Ochsner Clinic Department of Radiology. Dr. Obeng specializes in Emergency Radiology and Neuroradiology. Dr. Obeng attended medical school at the Stony Brook University in New York. Dr. Obeng completed diagnostic radiology residency at the Monmouth Medical Center in New Jersey. He also completed a fellowship in Neuroradiology at the University of North Carolina Hospitals in Chapel Hill. Dr. Obeng's academic interest is in neuroradiology with special interest in Head and Neck imaging.


Brian Ogden, MD

Brian Ogden, MD
Dr. Ogden received his medical education at LSU Medical School of Medicine in New Orleans. He performed his internship and radiology residency at Baylor College of Medicine. Following residency, Dr. Ogden performed a fellowship in MSK/Body Imaging at Ochsner. He has been on staff as a member of the Emergency Radiology section since 2010.


Vijay Ramalingam, MD

Vijay Ramalingam, MD
Dr. Ramalingam jointed the Ochsner Clinic Foundation in the section of Vascular and Interventional Radiology in 2017.Dr. Ramalingam is board certified in Diagnostic Radiology with additional Certificate of Added Qualification in Vascular and Interventional Radiology. He earned his medical degree from Boston University, completed his Diagnostic Radiology residency at Boston University Medical Center, followed by a fellowship in Interventional Radiology at Emory University Hospital. Prior to joining the Ochsner Clinic Foundation, Dr. Ramalingam was an Assistant Professor of Vascular and Interventional Radiology at Boston University Medical Center where he distinguished himself by significantly growing a robust and efficient group teaching practice and won the Boston University Department of Radiology annual teaching award for resident education and mentorship. His clinical expertise includes portal hypertension, advanced biliary interventions, interventional oncology, and dialysis access.


Brett Roberts, MD

Brett Roberts, MD
Dr. Roberts received a Doctor of Medicine degree from the Tulane University School of Medicine in New Orleans, LA. He completed an Internal Medicine Internship at Tulane University followed by a Radiology Residency at the University of Alabama at Birmingham. Dr. Roberts completed additional training as a Breast and Body Imaging Fellow at Memorial Sloan Kettering Cancer Center in Manhattan, NY. He is an active member of the Society of Breast Imaging, as well as holds a position on the Breast Sonography Exam Committee for the American Registry of Radiologic Technologists. He is currently involved in research regarding the use of abbreviated breast MRI for breast cancer screening. Dr. Roberts' emphasis is the early detection of breast cancer and compassionate patient care.


Ernest Rudman, MD

Ernest Rudman, MD
Dr. Ernest Rudman graduated magna cum laude from Boston University College of Arts and Sciences with a Bachelor of Arts degree in Biology. He earned his medical degree from Drexel University College of Medicine and completed an internship at Lehigh Valley Hospital in Allentown, PA. Dr. Rudman completed his radiology residency at the State University of New York Downstate Medical Center in Brooklyn, NY. He then completed a fellowship in Musculoskeletal Imaging and Intervention at Brigham and Women's Hospital, Harvard Medical School in Boston, MA. Dr. Rudman is is a member of Society of Skeletal Radiology, American Roentgen Ray Society, Radiologic Society of North America, and American College of Radiology.


Kori Safavi, MD

Kori Safavi, MD
Dr. Kurosh Safavi earned his medical degree from Drexel University College of Medicine in 2003. He completed his residency at Ochsner Foundation in diagnostic radiology in June 2008. In 2009 he completed his fellowship in cross-sectional imaging (ultrasound and body MRI) at the Mayo clinic in Scottsdale, Arizona. He joined our Radiology staff that year as Section Head of the Ochsner West Bank campus and also as a member of the ultrasound section at the Ochsner-Jefferson Highway campus. He is member of the ACR Committee on Ultrasound-Human Resources.


Julie G. Sossaman, MD

Julie G. Sossaman, MD
Dr. Sossaman attended LSU Medical School in New Orleans. She performed both her residency and fellowship in Body Imaging/MRI at Ochsner. Her primary interest is in Body Imaging. Dr. Sossaman has served as Assistant Program Director in the past and she is on both the resident selection committee and the Clinical Competency Committee.


Andrew Steven, MD

Andrew Steven, MD
Dr. Andrew Steven earned a Doctor of Medicine degree from Tulane University School of Medicine located in New Orleans, LA. He then completed a Diagnostic Radiology Residency with the Ochsner Clinic Foundation. Dr. Steven went on to complete a Neuroradiology Fellowship with the Department of Diagnostic Radiology and Nuclear Medicine at the University of Maryland Medical System. Upon completion of fellowship, he served as Assistant Professor for five years. Dr. Steven has experience in all aspects of Neuroradiology including brain, spine, and head and neck, with particular interest in advanced MRI applications including functional imaging. Dr. Steven also works extensively with residents, and he is the radiology liaison to the Ochsner Clinical School students. He is certified by the American Board of Radiology with a Certificate of Added Qualification in Neuroradiology.


Richard H. Tupler, MD, MBA

Richard H. Tupler, MD, MBA
Dr. Tupler is the co-section head of MSK Radiology and system physician lead for MRI at Ochsner. Fellowship-trained at Duke University, he specializes in both MSK and Body Imaging with particular interests in Sports Medicine and resident/fellow education. Dr. Tupler has received the radiology resident teaching award on numerous occasions.


Adam Wells, MD

Adam Wells, MD
Dr. Wells graduated from Tulane University School Of Medicine in New Orleans, LA. He received his undergraduate degree, graduating Magna Cum Laude, in Biology from Southern Methodist University in Dallas, TX. Dr. Wells holds professional memberships with the Society of Interventional Radiology, American College of Radiology, Association of University Radiologists, American Medical Association, Radiological Society of North America and Louisiana State Medical Society.


Resident Evaluation & Mentorship

All residents are assigned to a mentor by the Program Director for the R-1 year. Beginning the second year, residents are able to choose a new mentor from the attending staff. This mentor relationship gives the resident a close advisor for guidance and feedback while moving through the program and seeking future training or employment. The resident and mentor meet formally 2 times per year, and a summary is submitted to the program director for review.