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Covenant Health is an innovative, Catholic regional delivery network and a leader in values based, not-for-profit health and elder care. We sponsor hospitals, nursing homes, assisted living residences and other health and elder care organizations throughout New England.

CAT/CT Scans

Computerized Axial Tomography (CAT or CT Scan)

Hours of Service: 
Monday - Friday: 7:30 AM – 7:00 PM (On-call emergency services after hours).  All outpatient CAT Scans are to be scheduled through our central scheduling line at (207)777-4049.

Overview of CT
The dynamic CT Scan Department offers two scanners. Both are accredited by the American College of Radiology. The GE Optima 660 is a 64 slice scanner and the GE Lightspeed is a 16 slice scanner. Both employ advanced technology to obtain the best images at the lowest level of radiation. The scanners are capable of detecting a wide range of pathology throughout the body. The scan can be performed in either the axial plane or helical (spiral) which can then be reconstructed for a 3-dimensional image. 

The GE Optima 660 was installed in August 2012. It is an outstanding CT scanner because the acquisition speed is rapid and the image resolution is top of the line. GE uses the very latest advances in technology to reduce the amount of radiation needed for superb images which also reduces both the exam time and the amount of IV contrast needed for the CT exams.

CT Scanning Procedures:

  • General CT Scanning (Non-Contrast) Head/Spine/Extremities
  • Contrast CT Procedures Head/Chest/Abdomen/Pelvis
  • IV Contrast: Patients 70 years old and up, and patients with high blood pressure or known renal disease will need a lab test to determine their creatinine level.

Oral Contrast:

Frequently Asked Questions

Q- What is Oral Contrast? 
A-  Omnipaque 240 is the oral contrast (or dye) that is used to highlight the stomach and 
intestines for abdominal CT Scanning exams. It is mixed with water and needs to 
be taken prior to the exam.

Q- What is IV Contrast?
A- Optiray is the IV contrast (or dye) that is used for exams that require having an IV
started at the procedure time. This is used to highlight the blood vessels and organs
in the chest and abdomen.

More Information

CAT/CT Scan (Excellent information for patients from the American College of Radiology.) 


St. Mary's Health System • 93 Campus Avenue • Lewiston, ME 04240