Diagnostic Services

Diagnostic Services

Diagnostic Imaging

St. Margaret’s Diagnostic Services includes a Diagnostic Imaging Department that offers a full range of services to the Illinois Valley community.

Cardiac Imaging provides Echocardiograms and Thallium Stress testing. St. Margaret’s Nuclear Medicine is fully computerized and all technologists are registered and state licensed. St. Margaret’s uses transvaginal sonography consisting of high resolution, real-time equipment, and this type of sonography can detect a pregnancy at 4-5 weeks.

Magnetic Resonance Imaging (MRI), a technique that uses electromagnets, is available Monday through Saturday at St. Margaret’s. Visit our MRI page for more hour info and to schedule an appointment.

Mammograms and breast biopsies are also routinely performed at St. Margaret’s.

St. Margaret’s Now Offers 3-D Tomosynthesis Mammography. During a 3-D mammo, the X-ray tube moves in an arc over the breast—taking low-dose X-ray images. A computer then produces a 3-D image of the breast in slices, allowing the Radiologist to view the tissue in greater detail, resulting in earlier detection of small breast cancers. Click here to find out more or to schedule a 3-D Tomosynthesis Mammograhy.

For appointments or further information on any Diagnostic Imaging Service, call (815) 664-1468.


St. Margaret’s Ear, Nose, Throat & Facial Plastic Surgery Consultants offers a variety of hearing tests. Tests include industrial audiometric testing, hearing screenings, and evoked potential testing. Audiologists provide complete hearing aid services and are university trained. Interested persons should call (815) 224-3040.

Cardiopulmonary Services

Electrocardiograms (EKG’s), EEG’s, pulmonary function testing, arterial dopplers and cardiac stress testing are only a few of the services provided by the Cardiopulmonary Department. Trained technicians perform diagnostic tests relating to the heart, lungs, and circulatory system for both inpatients and outpatients. They also provide respiratory treatments, oxygen therapy and ventilator care. As part of St. Margaret’s Occupational Health Services Program (OHSP), Cardiopulmonary Services offers Breath Alcohol Testing (BAT) and a Smoking Cessation Program for area employers and the community. For more information, call (815) 664-1467.


St. Margaret’s Laboratory is open 24 hours a day, every day. State-of-the-art equipment and board certified staff allow turn around time of 8 hours or less for most tests. Advance appointments are not required. Call (815) 664-1471 for more information.

Sleep Center

The Sleep Center at St. Margaret’s Hospital offers a full range of services designed to evaluate, diagnose, treat and help you manage your sleep disorder. In order to diagnose a sleep disorder, patients usually spend the night in the hospital’s Sleep Center, where experienced technicians monitor and record brain waves, muscle activity, breathing effort and heart rhythms while the patient sleeps. Results of the studies are interpreted by physicians who are board certified in Sleep Medicine. For more information, call (815) 664-1122.

If you have a sleep study scheduled, download these forms: