Radiology & Imaging Services at St. Jude and St. Joseph Heritage Medical Group

At St. Jude and St. Joseph Heritage Medical Group, we offer quality diagnostic imaging for patients of all ages, in all stages and variations of health and disease. These tests allow radiologists and doctors to make comprehensive evaluations, and diagnose, plan and monitor treatments. We also work to reduce and monitor radiation doses for all patients, and are accredited for our radiology services.

There are two types of radiology: diagnostic and interventional radiology.

  • Diagnostic radiology is used to diagnose the cause of your symptoms, monitor how your body is responding to treatments and screen for illnesses such as breast and colon cancer or heart disease.
  • Interventional radiology uses imaging such as CT, ultrasound, MRI and fluoroscopy to help guide procedures. This is often used when inserting catheters, wires, and other small instruments and tools into your body.

For your convenience, we're pleased to offer imaging and radiology services on-site at our Orange and Santa Ana Medical Office locations. We're open extended weekday hours and on the weekends to meet your family's needs.

Procedures Performed

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.

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.

DEXA Bone Density Testing

Osteoporosis and low bone mass affect an estimated 44 million Americans. Of those, 10 million have osteoporosis, and the remaining 34 million have a lower than normal bone mass and are at higher risk of developing osteoporosis. Unfortunately, people often do not realize they have osteoporosis until either they have a fracture or have a screening test ordered by their doctor to check for osteoporosis. Early detection and treatment of bone loss is key to healthy aging. Screening is generally recommended for women at menopause and men at age 70, or earlier if have risks factor for bone loss according to the current recommendations.

Body composition measurement

Increased weight, when it is due to body fat--especially abdominal fat--increases the risk for heart disease, diabetes and chronic illness. Body composition measurement using a DXA scan is a simple, low radiation test that can measure your muscle mass, body fat and bone. The test will determine your body muscle mass and percentage of fat mass, and be used to track changes in your body composition over time. In addition, our latest technology can measure the amount of fat tissue inside the abdomen—visceral fat. This identifies health risks more precisely.

Ultrasound Thyroid

Ultrasound or Sonography uses sound waves to detect abnormalities in the body. It is the preferred radiologic procedure for studying the thyroid gland as it is the most sensitive method of detecting and describing thyroid nodule features. It is safe for use in all patients, including pregnant or renally impaired patients, as it does not emit radiation or require the use of contrast. Ultrasonography is also used to detect parathyroid tumors as well as abnormal lymph nodes important in thyroid cancer surveillance.

Ultrasound Biopsy of Thyroid Nodules

Millions of people worldwide have thyroid nodules. Recently, thyroid cancer was considered the fastest rising type of cancer in the US. Our Endocrinologists specialize in managing thyroid nodules and use thyroid ultrasonography to detect abnormalities in the thyroid gland. This technique is superior to CT or MRI to evaluate abnormal thyroid features, and to assess thyroid nodules for thyroid cancer detection and evaluation. We offer state-of-the-art thyroid ultrasound and dedicated ultrasound technicians that specialize only in thyroid nodule imaging. Our Endocrinologists review the ultrasound images and when needed, perform onsite fine needle aspiration biopsy of abnormal thyroid tissue under ultrasound guidance to evaluate for the possibility of thyroid cancer.


Ultrasound imaging, also called ultrasound scanning or sonography, involves exposing part of the body to high-frequency sound waves to produce pictures of the inside of the body. Ultrasound exams do not use ionizing radiation (as used in x-rays). Because ultrasound images are captured in real-time, they can show the structure and movement of the body's internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions.



Our Providers

Our Locations

Orange - Chapman Radiology

Orange - Chapman Radiology

2501 E. Chapman Ave.

Orange, CA 92869

Scheduling Hours: Mon - Fri: 8 a.m. - 5 p.m.

Mammography: Mon-Fri: 8 a.m. - 6 p.m.
Sat-Sun: 8 a.m. - 4:30 p.m.

Ultrasound: Mon-Fri: 8 a.m. - 4:30 p.m.
Sat-Sun: 8 a.m. - 4:30 pm.

Dexascan: Mon-Fri: 8 a.m. - 4 p.m.

Xrays: Mon-Fri: 8 a.m. - 8 p.m.
Sat-Sun: 8 a.m. - 8 p.m.

Holiday Hours:

Memorial Day Monday, May 25: 8:30 a.m. - 5 p.m.

Independence Day Saturday, July 4: 8:30 a.m. - 5 p.m.

Labor Day Monday Sept. 7: 8:30 a.m. - 5 p.m.

Thanksgiving Thursday, Nov. 26: 8 a.m. - 1 p.m.
Friday, Nov. 27: 8 a.m. - 8 p.m.

Christmas Eve Thursday, December 24: 8 a.m. - 5 p.m.
Christmas Friday, Dec. 25: 8 a.m. - 1 p.m.

New Year Thursday, Dec. 31: 8:30 a.m. - 5 p.m.
Friday, Jan 1: 8:00 a.m. - 5 p.m.

Schedule a Mammogram View This Location
Santa Ana - Radiology

Santa Ana - Radiology

2212 E. Fourth St.

Santa Ana, CA 92705

Ultrasound: Mon - Fri: 8 a.m. - 4:30 p.m.
Mon - Fri: 8 a.m. - 4:30 p.m.

Holiday Hours:

Memorial Day
Monday, May 28: 9 a.m. - 2 p.m.
Independence Day
Wednesday, July 4: 9 a.m. - 2 p.m.
Labor Day
Monday Sept. 3: 9 a.m. - 2 p.m.
Thursday, Nov. 28: 9 a.m. - 2 p.m.
Friday, Nov. 29: 9 a.m. - 5 p.m.
Tuesday, Dec. 24: 9 a.m. - 2 p.m.
New Year
Tuesday, Dec. 31: 9 a.m. - 2 p.m.
Wednesday, Jan 1: 9 a.m. - 2 p.m.

View This Location
Diamond Bar

Diamond Bar

253 S. Diamond Bar Blvd.

Diamond Bar, CA 91765

Mon - Thur: 7:30 a.m. - 6 p.m.
Fri: 7:30 a.m. - 5:30 p.m.
Lab: Mon - Fri: 7:30 a.m. - 4:45 p.m.

View This Location
Yorba Linda - Imaging

Yorba Linda - Imaging

4300 Rose Dr.

Yorba Linda, CA 92886

Lab - Mon - Fri: 6:30 a.m. - 5 p.m.

View This Location
St. Jude Medical Plaza

St. Jude Medical Plaza

2141 N. Harbor Blvd.

Fullerton, CA 92835