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Imaging, X-Rays and Mammography

The best images are captured by the most skilled and certified technologists, using the most appropriate technology, interpreted by board-certified radiologists. That's what you'll find at St. Lawrence Health System's Imaging centers.

Between Canton-Potsdam Hospital, Gouverneur Hospital, and Massena Hospital, we have the best-equipped Imaging centers in the North Country. We offer 128-slice CT scanners featuring the newest low-dose technology available for minimizing exposure to radiation, and both 1.5 and 3 Tesla open bore high field MRIs. We have iCAD (computer-aided detection) software for more accurate mammography readings, 2D/3D mammography, MRI breast, and traditional and ABVS ultrasound, allowing us to provide full-service women's breast imaging. For women planning a family, we provide 3D/4D ultrasound. We are Picture Archival Communication System (PACS) capable, which means we can store and transmit images to the University of Vermont Medical Center providers or to your physician. Images are available for interpretation immediately.

Definitions and Locations

We understand the different names for imaging procedures may be a bit overwhelming and confusing. Here is a brief explanation on each service to assist you in better understanding them, and where you can go for each service.

Ultrasound (Automated Breast Volume Scanner)

is the latest technology in breast cancer detection if you have dense breast tissue. An ultrasound of each breast is performed using a high frequency ultrasound probe which sweeps across the whole breast. A 3D image of the breast is produces that allows a clearer, more detailed image as a follow-up to a conventional mammogram. (Accredited by the American College of Radiology/ACR.)

CT Scan (Computerized axial Tomography)

combines a series of X-ray images taken from different angles around your body. It uses computer processing to create cross-sectional images (slices) of the bones, blood vessels, and soft tissues inside your body. CT scan images provide more-detailed information than plain X-ray. (Accredited by the American College of Radiology/ACR, for General CT and Lung cancer screening.)

Mammography, or Mammogram

is an X-ray of your breast. Traditional mammography creates a 2D image of the breast and is a screening and diagnostic tool used to detect and diagnose breast cancer. Together with regular clinical exams and monthly breast self-examinations, mammograms are a key element in the early diagnosis of breast cancer. We now offer 3D mammography at all four of our sites. 3D is a revolutionary new tool that combines multiple breast X-rays to create a three-dimensional picture of the breast, which improves the early detection of breast cancer during screening and diagnostic exams; this is instrumental in women with dense breast tissue. 3D mammography machines create 2D and 3D images. (FDA accredited, and Accreditation by the American College of Radiology/ACR.)

MRI (Magnetic Resonance Imaging)

is a technique that uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body. Most MRI machines are large, tube-shaped magnets. When you lie inside an MRI machine, the magnetic field temporarily realigns hydrogen atoms in your body. Radio waves cause these aligned atoms to produce very faint signals, which are used to create cross-sectional MRI. The MRI machine can also be used to produce 3-D images that may be viewed from many different angles. There are different strength MRI machines, and the higher the strength, the more detailed the image. We have a 1.5Tesla MRI at Potsdam and Gouverneur, and a 3Tesla MRI in Canton. (Accreditated by the American College of Radiology/ACR.)

Nuclear Medicine Imaging

assesses your organ function and structure, and identifies the presence of disease. It uses small amounts of radioactive substances known as tracers, these tracers are either swallowed, inhaled, or injected into a vein in your arm depending on what part of the body is being imaged. The tracers are designed to target and image a specific area of your body. Nuclear medicine is a way to gather medical information that may otherwise be unavailable, require surgery, or necessitate more expensive diagnostic tests. (Accredited by the American College of Radiology/ACR.)

PET/CT Scan (Positron Emission Tomography)

is an imaging test that allows your provider to check for diseases in your body while using a radioactive sugar. These tracers are injected into a vein in your arm where the organs and tissues then absorb the tracer. PET provides information regarding glucose metabolism of tissues. Cancerous tissues are glucose-hungry and show up differently on PET scans than healthy tissues, because of their different glucose metabolisms. Your provider may use PET/CT to determine if an area is cancerous or to evaluate for any spread of cancer if you have already been diagnosed with it. PET/CT is also used for cardiac imaging, and neurologic imaging (Parkinson’s disease, dementia, etc.) (Accredited by the American College of Radiology/ACR.)

Ultrasound Imaging

uses high-frequency sound waves to view inside your body. Because ultrasound images are captured in real-time, they can also show the movement of your body's internal organs, and blood flowing through the blood vessels. Unlike X-ray imaging, there is no ionizing radiation exposure associated with ultrasound imaging. (Accredited by the American College of Radiology/ACR.)


are a form of electromagnetic radiation, similar to visible light. Unlike light, however, x-rays have higher energy and can pass through most objects, including the body. Medical x-rays are used to generate images of tissues and structures inside your body. 

  • 50 Leroy Street, Potsdam - Schedule at (315) 261-5240
  • 49 Lawrence Avenue, Potsdam - No appointment necessary; open daily from 8:00 am - 8:00 pm
  • 80 East Main Street, Canton - Schedule at (315) 261-5240
  • 77 West Barney Street, Gouverneur - Schedule at (315) 261-5712
  • 1 Hospital Drive, Massena - Schedule at (315) 769-4228

Our Imaging centers are accredited by the FDA and the American College of Radiology. Our technologists are registered with the American Registry of Radiologic Technologists and the American Registry of Diagnostic Medical Sonographers.  

computed tomography accredited facility mammography accredited facility magnetic resonance imaging accredited facility ACR nuclear medicine accredited facility ACR positron emission tomography accredited facility ACR ultrasound accredited facility