Section of Nuclear Radiology

Section of Nuclear RadiologyThe UT Health's section of Nuclear Medicine provides imaging services for San Antonio’s University Hospital and UT Medicine Systems.  Our team is comprised of 4 board certified physicians that have achieved subspecialized training through dedicated nuclear medicine residencies and fellowships. Our section delivers comprehensive Nuclear Medicine services with cutting edge techniques, some of which include:


Advanced Nuclear Medicine Techniques Provided:

  • Osteomyelitis Imaging with Hybrid Modality: utilizing single photon emission computed tomography (SPECT)/x-ray computed tomography (CT) for 3-D imaging:
    • Bone scan with multiphase SPECT/CT imaging.
    • White blood cell (WBC) infection imaging with simultaneous acquisition of radiolabeled WBC and bone marrow agent with SPECT subtraction.
  • PET/CT Imaging: for detection of malignancy, initial staging, response to therapy and restaging of disease to include lymphoma (Hodgkin’s and non-Hodgkin’s lymphoma), lung, breast, ovarian, cervical, uterine, esophageal, and colon cancer, and many others.
  • Myocardial SPECT Perfusion Imaging: for diagnosis of myocardial ischemia and infarction via stress and rest and as needed viability imaging and a gated acquisition for the determination of left ventricular ejection fraction.
  • Dopamine Transporter Imaging (DaTscan): for the diagnosis of Parkinson’s disease.
  • Brain Perfusion SPECT Imaging: for intractable seizure localization with interictal and ictal SPECT brain scans subtraction and MRI image co-registration.
  • Comprehensive Nuclear Medicine Endocrine Collaboration and Clinic: for diagnostic evaluation and radiotherapy of hyperthyroidism and most thyroid cancers.
  • Radiotherapeutic Microspheres for the Treatment of Liver Cancer with SPECT/CT pre-therapy and post therapy imaging. Availability of two different Y-90 beta-emitting microspheres, Y-90 SIR-spheres for a more embolic therapy and Y-90 Theraspheres for more specific radiation therapy and segmentectomy.
  • Solid Gastric Emptying 4 hour study: utilizing the standardized radiolabeled egg meal, simultaneous blood glucose levels and patient symptoms to assess for delayed gastric emptying (gastroparesis) and rapid gastric emptying (functional dyspepsia). Availability of a standardized liquid carbohydrate glucose meal for assessment of carbohydrate gastric emptying.
  • Parathyroid Imaging using SPECT/CT Imaging with capability for Parathyroid 4D-CT Image Fusion: for the diagnosis of parathyroid adenomas and improved pre-surgical localization.
  • Extensive Research Capabilities in Clinical Nuclear Medicine: Current Phase I/II testing of a novel nanoparticle radionuclide therapy for the treatment of glioblastoma. This novel therapy has been developed in the UT Health's radiology research laboratories and its clinical testing is an example of a bench to bedside initiative.  



Nuclear Medicine Physicians

Umber Salman, M.D.
Assistant Professor of Radiology
Section Chief of Nuclear Medicine


William Phillips, M.D.
Professor of Radiology


Darlene Metter, M.D.
Professor of Radiology and Family & Community Medicine


Ralph Blumhardt, M.D.
Professor of Radiology


Contact Information:
Angela Tarango
Nuclear Medicine Administrative Support
Phone: 210-567-6488
Fax: 210-567-6418