Meet the Principal Investigator
Robert Carson Sibley, M.D.
Dr. Sibley is an Assistant Professor of Radiology at UT Southwestern, dual board certified by the American Board of Radiology and the American Board of Nuclear Medicine. His clinical expertise spans nuclear medicine, body magnetic resonance imaging (MR), and abdominal imaging, with a particular focus on advanced lymphatic imaging. He completed his medical training at UT Southwestern, followed by residency in diagnostic and nuclear radiology, and advanced fellowship training at Stanford, where he gained additional experience in lymph imaging and biodesign innovation.
Dr. Sibley’s clinical workflow integrates a broad spectrum of imaging modalities, including PET/CT and SPECT/CT, general nuclear medicine, body MR, and specialized lymphatic imaging. He routinely interprets complex oncologic and non-oncologic PET/CT and SPECT/CT studies, performs quantitative and qualitative assessments in body MR, and provides advanced diagnostic services for lymphatic disorders. His work has contributed to the development and clinical translation of novel imaging techniques for lymphatic diseases, and he actively leads a multidisciplinary lymphatic disease conference to optimize patient care.
Affiliated Research Experts
Jaewon Yang, Ph.D.
Dr. Yang began his research career in Radiation Oncology at Stanford University before moving to Radiology at UCSF. At Stanford, supported by a grant from RefleXion Medical, he demonstrated proof-of-principle for PET-guided lung tumor tracking, which later contributed to the commercialization of the world’s first emission-guided radiotherapy system. At UCSF, in collaboration with GE Healthcare, he advanced quantitative PET techniques for clinical use, emphasizing attenuation correction and motion management with PET/MR data. He has pioneered deep learning (DL) approaches for deriving attenuation/scatter-corrected images directly from non-corrected image in PET and SPECT.
Yaowu Hao, Ph.D.
Dr. Yaowu Hao is a professor in the Department of Materials Science and Engineering at University of Texas at Arlington. He received his Ph. D. degree from MIT in 2003 and his MS degree from University of Florida in 1998, both in Materials Science and Engineering. He was a postdoctoral fellow in the Department of Materials Science and Engineering at Johns Hopkins University before he joined UT Arlington in fall 2005. He earned Bachelor and Master of Science degrees in Metal Physics and Chemistry at the University of Science and Technology in Beijing.
Current research interest is in general field of nanomedicine. The research topics include plasmonic metal and semiconductor nanoparticles for biomedical imaging and drug delivery applications and radioactive copper-based inorganic nanoparticles for biomedical imaging and therapeutic applications.
Michael Dellinger, Ph.D.
Dr. Michael Dellinger is an Associate Professor in the Departments of Surgery and Molecular Biology at UT Southwestern Medical Center. He is also the Director of Research for the Lymphatic Malformation Institute, a non-profit organization that funds research on complex lymphatic anomalies. Additionally, he works closely with The Lymphangiomatosis & Gorham’s Disease Alliance (LGDA), and he was the Research Leader for the LGDA’s Rare as One Project sponsored by the Chan-Zuckerberg Initiative (CZI). Dr. Dellinger completed his Ph.D. work at the University of Arizona and his postdoctoral studies at UT Southwestern Medical Center. His lab is focused on identifying novel treatments for complex lymphatic anomalies.
Lab Members
Sina Oh, M.D. (Postdoctoral Fellow)
Sina Oh, M.D. is a physician with clinical experience in primary care, dermatology, and infectious diseases. She completed her medical degree at Chungnam National University in South Korea and has practiced in both Korean and U.S. healthcare settings.
As a postdoctoral researcher, her research interests center on nuclear medicine, particularly lymphatic imaging and functional diagnostics. Her publication in Medicine (Baltimore) focused on a rare case involving lymphatic and renal manifestations in a patient with lupus, reinforcing her interest in lymphatic imaging and translational research. She is especially interested in PET and SPECT imaging for early disease detection and its impact on patient-centered care.
Alumni
Juliana Kim, M.D.
Juliana Kim, M.D. is a graduate of the University of Texas Southwestern Medical school. Prior to medical school she graduated from the University of Texas at Austin where she received both her B.S. in Biochemistry as a Dean’s Scholar and B.B.A. in Business Honors prior to joining UT Southwestern as a medical student. During her undergraduate years, she studied neural tube closure in frog embryos with the Wallingford Lab where she conducted time-series analyses of various proteins for their positions within cells and directional changes of motion observed through 750,000+ measurements. During her time in the Sibley Lab, she studied quantitative lymphoscintigraphy and helped to implement an advanced clinical protocol for patients with lymphedema. After Dr. Kim's time with the Sibley Lab, she continued her clinical training in nuclear medicine and radiology at the University of Southern California.