Providing Highly Advanced Diagnostic Imaging Services

At United Medical Imaging Healthcare (UMIH), we put our patients at the center of everything we do. Over the past two decades we have built a comprehensive outpatient radiology network across Los Angeles and Orange counties, serving more than 300,000 patients each year through 32 full-service facilities.

Every UMIH center is accredited by the American College of Radiology (ACR) and staffed by fellowship-trained radiologists covering musculoskeletal (MSK), breast, and neuroradiology subspecialties.

What we offer

  • 3T and 1.5T high-field MRI, wide-bore MRI, and open MRI for claustrophobic or larger patients
  • 128-slice CT and CT angiography (CTA)
  • PET/CT for oncology staging, restaging, and treatment response
  • 3D digital mammography, breast ultrasound, and image-guided breast biopsy
  • Diagnostic ultrasound, DEXA bone density, fluoroscopy, and digital X-ray
  • Nuclear medicine including bone scan, HIDA, MAG3 renal, and cardiac perfusion

Fast, patient-first scheduling

Same-day and walk-in appointments are available at most locations (unless the study requires prior authorization or extensive prep). Referring physicians typically receive our specialty diagnostic reports within 24–48 hours of the exam.

Extended hours are available at select locations (Monday–Friday 7:30 am to 7:00 pm, and Saturdays on request). For scheduling assistance call (310) 943-8400 or request an appointment through our patient portal.

Nuclear Medicine in Southern California

Nuclear medicine uses a small amount of a radioactive tracer, tailored to the target organ, to reveal how that organ is functioning — not just what it looks like.

About Nuclear Medicine

Nuclear medicine differs from CT and MRI in that it images function, not just anatomy. A tracer is injected, swallowed, or inhaled, and a special gamma camera detects where the tracer accumulates. UMIH performs bone scans, thyroid uptake and scan, HIDA (hepatobiliary), MAG3 renal, and myocardial perfusion imaging.

Cities where UMIH offers Nuclear Medicine

Frequently asked questions

Is nuclear medicine radiation dangerous?

The tracer dose is small and decays quickly. Drinking plenty of water after the exam helps flush the tracer from the body.

Can I be around others after my scan?

Yes for most tracers. For a few tracers (e.g., therapeutic doses) short-term precautions with young children or pregnant contacts are advised — you’ll be told before the exam.

Do I need to fast for a nuclear medicine scan?

It depends on the exam. HIDA and cardiac studies typically require fasting; bone scans do not.