Meet Our Physicians

Sand Lake Imaging is comprised of highly trained, experienced and caring radiologists. Our radiologists are helping to set the standard of radiological expertise and care in the central florida region. In order to provide the best subspecialty expertise within our practice, our radiologist work in an interactive consultative manner using PACS-RIS to ensure the most expert opinion is delivered in a timely fashion.

Stephen M. Bravo MD

Dr. Bravo is a former attending radiologist at Brigham and Women’s hospital and former faculty member at Harvard Medical School. Dr Bravo is an expert in neuroradiology, musculoskeletal radiology, and interventional radiology; he has authored numerous publications and abstracts in these areas of subspecializations. Dr. Bravo was named one of Orlando’s best doctors by Best Doctors in America and Consumer’s Guide to Top Doctors since 2011, as highlighted in Orlando Magazine’s Annual Best Physicians List.  Dr Bravo is board certified by the American Board of Radiology.

Robert A. Posniak MD

Dr.Posniak has practiced in all areas of diagnostic radiology with special emphasis on women’s imaging, women’s intervention, and CT virtual colonography. He completed a fellowship in vascular and interventional radiology. Dr. Posniak is a former faculty member at the University Of Miami School of Medicine. He is board certified by the American Board of Radiology and is a member of the Society of Breast Imaging.

Charlotte D. Elenberger MD

Dr. Elenberger specializes in breast imaging and intervention. She completed fellowship training in breast imaging and body imaging at Duke University Medical Center. Dr Elenberger has recently been named one of Orlando’s best doctors by Best Doctors in America and Consumers Guide to Top Doctors. Dr Elenberger is board certified in radiology and is a member of the American College of Radiology’s Society of Breast Imaging and has achieved LEVEL II cardic CT certifcation.

Alexandra Osorio, MD

Dr. Osorio is a Fellowship Trained Radiologist in the areas of Vascular and Interventional Radiology at Yale-New Haven Hospital’s Yale University School of Medicine. She is Board Certified by the American College of Radiology and has practiced at several locations within the Florida Hospital system. She is widely published in several areas of Radiology and is an active member of the Central Florida community.


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