Skip Navigation

Phone Service Update

We apologize that callers may intermittently experience longer than usual wait times. We are working with our phone service provider as they try to improve the situation as soon as possible.

COVID-19 Vaccine Information |Patient Care Options | Visitor Guidelines | Coronavirus Information | Self-Checker | Get Email Alerts

Menu Search
Johns Hopkins Medical Imaging

In This Section      


mammogram Request an Appointment

Self-schedule Online

Patients now have the convenience to self-schedule mammogram appointments online through our patient portal (MyChart).

A mammogram is an X-ray of the breast used to screen for and diagnose breast cancer. A mammography unit can either produce a standard 2-D image or 3-D image. 3-D mammography, or tomosynthesis, produces more detailed images of the breast tissue. Mammograms can also be used for a breast tissue or fluid biopsy.

Screening Mammograms

Annual screening mammograms are recommended for women who are 40 years or older, or for younger women with specific risk factors for breast cancer. You don’t have to have any signs or symptoms of a breast abnormality in order to receive a screening; they are used for the early detection of breast cancer and other breast health issues. Eighty percent of tumors found during a mammogram are benign. Screenings are also recommended for a period of time as follow-up care after breast cancer treatment.

Diagnostic Mammograms

You will be referred for this type of mammogram if you have an abnormality on your screening mammogram or if you have a breast mass or other breast change (found during a breast self-exam or by your physician). Diagnostic imaging may include mammograms with extra compression or magnification, mammograms shot from different angles or breast ultrasound.

Learn more about a mammogram exam in the Johns Hopkins Health Library.

Why Choose Johns Hopkins Medical Imaging?

Johns Hopkins Medical Imaging brings the world-class expertise of Johns Hopkins to your community. Why does expertise matter? Because you matter. Here is how we do it:

  • Physician Experts. We set the standard for other radiologists around the world.
  • #1 Radiology Department. We are the top-ranked radiology department by U.S. News and World Report
  • State-of-the-Art Technology. Doing the right study with high quality increases accuracy.
  • Your Safety Is Always Our Priority. We take comprehensive safety measures to minimize any possible risk. 

How do I prepare for a mammogram?

SCHEDULING: Breasts can be tender the week before and during menstruation, so try to schedule your mammogram for one to two weeks after your period starts. If you have breast implants, please notify the office when you schedule the exam.

PRECAUTIONS: If you are pregnant or think you may be pregnant, please check with your doctor before scheduling the exam. We will discuss other options with you and your doctor.

BREASTFEEDING: Please notify the technologist if you are currently breastfeeding.

PERSONAL HYGIENE: Do not use any deodorant, powder, lotion or perfume on the day of your exam.

CLOTHING: You must remove your clothing from the waist up and change into a patient gown and lock up all personal belongings. Please remove all piercings and leave all jewelry and valuables at home.

What happens during a mammogram?

  1. You will be asked to remove your clothing from the waist up and any other clothing or jewelry that may interfere with the exam.
  2. You will stand in front of the mammography machine and one breast will be placed on the X-ray plate.
  3. A separate flat plate will be brought down on top of the breast to compress it against the X-ray plate. You may feel some discomfort or pressure on your breasts during this X-ray process. This part of the process should only last for a few minutes.

Learn more about what happens during a mammogram exam in the Johns Hopkins Health Library.

What happens after a mammogram?

There is typically no special type of care following a mammogram. However, your health care provider may give you additional instructions depending on your specific health condition.