Imaging Services

Imaging is one of the most important tools doctors have for diagnosing and treating medical conditions. Remarkable advances in imaging have been made in just the past few years. St. Joseph Health - Sonoma County offers the latest and most effective services, including:

  • CT-Computerized Tomography
  • Diagnostic Radiology
  • Dual Energy X-Ray Absorptiometry (DEXA)
  • Digital Mammography
  • Interventional Radiology
  • Low Dose CT Lung Screening
  • MRI-Magnetic Resonance
  • Nuclear Medicine
  • PET/CT
  • Radiography/Fluoroscopy (X-ray)
  • Ultrasound/Echocardiography


  • Outpatient Imaging - Santa Rosa
    121 Sotoyome St
    Santa Rosa, CA 95405
    Phone: (707) 525-4040
    Fax: (707) 525-4095

    Outpatient Imaging – Petaluma
    400 N. McDowell Blvd
    Petaluma, CA 94954
    (707) 778-2555

  • Outpatient X-Ray
    500 Doyle Park Dr.
    Santa Rosa, CA 95405
    Phone: (707) 525-5369
    Fax: (707) 522-1508

    Diagnostic Cardiology
    500 Doyle Park Dr. Suite G03
    Santa Rosa, CA 95405
    Phone: (707) 547-4606
    Fax: (707) 522-1558

Tomography (CT)

CT scans were developed originally to diagnose brain disorders. They are now used to collect images of tissues throughout the entire body. The clarity and detail provided by a scan often make it unnecessary for patients to undergo exploratory surgery. Modern CT scanners create only an ultra-thin, low dose X-ray beam, so radiation exposure is minimized. CT scans provide greater detail than standard x-rays and can provide a more detailed visualization of the internal organs and soft tissues.

Diagnostic Radiology

The Diagnostic Radiology Department performs standard radiographic and fluoroscopic imaging studies including procedures such as x-rays to detect broken bones, evaluate lung function and gastrointestinal disease processes. Diagnostic Radiology also performs exams during surgical procedures.

Interventional Radiology

The hospital’s Vascular Interventional Lab (VIL) provides diagnostic and treatment options such as angiograms for diseases of the vascular system and visceral organs. They use fluoroscopy (X-rays) to perform minimally invasive procedures in treating such problems as clogged arteries in areas of the body other than the heart such as the arms, legs and kidneys. The latest addition to our Vascular Interventional Lab capabilities is the use of lasers to directly remove the plaques and blood clots that threaten blood flow to the legs and feet. This exciting, new device can reduce the need for amputation in patients with severe peripheral vascular disease and improve the quality of life for those with less severe disease.

Diagnostic Ultrasound and Echocardiography

Ultrasound or Sonography uses sound waves to detect abnormalities in many parts the body. Internal organs and structures reflect the sound waves. Special instruments create an image of the desired area then interpret the reflections. Echocardiographic testing uses sound waves to create an image of the heart. This non-invasive test is particularly useful in detecting and managing heart disease and is one of the standard tools applied by cardiologists.

Nuclear Medicine

Nuclear medicine uses a camera (detector) to create an image of certain tissues and organs in the body after a radioactive tracer (radionuclide or radioisotope) accumulates in the tissues. The radioactive tracer, usually injected into a vein, allows images to show how organs and tissues are functioning. Our Imaging Department has two nuclear medicine camera systems, both with two detectors for faster imaging. Nuclear Medicine exams include bone scans, thyroid uptake and scans, myocardial perfusion imaging (Cardiolite Stress Tests), hepatobiliary imaging, white blood cell imaging, parathyroid imaging, and kidney imaging.

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