Mammography is an x-ray procedure performed to help identify breast cancer in its early stages before lumps can be felt by physical examination, and while the cancer is still small enough to be treated effectively.

Types of Mammograms

  • Screening Mammograms – performed for patients who have no symptoms of breast cancer
  • Diagnostic Mammograms – performed for patients of any age, who have specific breast symptoms such as new pain, lump or unusual changes to the breast or surrounding tissue.  This testing is often performed in combination with a breast ultrasound study to exclude any evidence of cancer.


When you arrive at GNMI you will be required to undress from the waist up and put on a gown that we would provide. Each breast will then be individually positioned and imaged in between 2 plastic plates so that the breast can be compressed and flattened.  Some women may feel some discomfort with the procedure; however you should not experience significant pain.  The amount of radiation used in mammography testing is minimal and is considered to be very safe.

Mammography Checklist – Patient Preparation

  • Please bring your health card and your requisition with you to your appointment: Requisition Form.
  • Please arrive 10 minutes early to register.
  • Please refer to the different exam preparation checklists below.

A typical exam can last between 20 t0 30 minutes.  Although no specific preparation is required, we do ask that you book an appointment within the first 14 days of your menstrual cycle. Wearing a 2 piece outfit is also recommended for convenience. We ask that you refrain from the use antiperspirants, deodorants, or lotion in the underarm or breast area.

mammography GNMI
Mammography May 16, 2019