Mammogram, X-ray of the Breast

Mammography is the X-ray imaging that is used to screen for abnormalities in the breast. Mammography plays a key role in the early detection and treatment of breast cancer and helps to reduce the number of deaths caused by the disease.

Mammography screening is recommended for all women over the age of 40 years or for younger women who have a family history of breast cancer.

How does mammography work?

For a mammogram to be taken, the breast is squeezed and spread out between two hard, flat plates. The mammogram then produces black and white X-ray images of the breast which can be displayed on a computer screen and assessed by an expert in breast cancer.

Mammograms are very accurate but can still sometimes miss cancer. Therefore, all women are advised to have a clinical breast exam (CBE) in which the appearance and feel of the breasts is checked by a healthcare provider who is trained in breast examination.

During a CBE, the armpits are also checked for the presence of lumps and other changes. Women should have a clinical breast exam every 3 years starting from the age of 20 years and every year after the age of 40.

Timing of mammography

Mammography may be mildly painful or uncomfortable and is best avoided before periods when the breasts are more sensitive. An ideal time for a mammography is a week after the last period finished, when the breasts are less tender.

On the day of mammography, it is advisable not to wear antiperspirants, perfumes, lotions, powders, deodorants or jewellery as these can interfere with the images produced.

The patient is asked to place the breast between two plastic plates which press gently on the breast to flatten it. The pressure lasts for around a few seconds and two images of each breast are taken - one from the side and another from above. The whole procedure takes around 15 minutes.

What happens afterwards?

If a breast lump is detected via mammography, further tests are advised including a fine needle aspiration or a biopsy for confirmation of the diagnosis and commencement of treatment. The mammogram also shows how dense the breast tissue is.

While some breasts have more fatty tissue than fibrous and glandular, others have the opposite. The former are termed low density breasts and the latter high density breasts. High density breast tissue is more at risk of breast cancer.

Further Reading

Last Updated: Jul 8, 2023

Dr. Ananya Mandal

Written by

Dr. Ananya Mandal

Dr. Ananya Mandal is a doctor by profession, lecturer by vocation and a medical writer by passion. She specialized in Clinical Pharmacology after her bachelor's (MBBS). For her, health communication is not just writing complicated reviews for professionals but making medical knowledge understandable and available to the general public as well.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Mandal, Ananya. (2023, July 08). Mammogram, X-ray of the Breast. News-Medical. Retrieved on February 28, 2024 from

  • MLA

    Mandal, Ananya. "Mammogram, X-ray of the Breast". News-Medical. 28 February 2024. <>.

  • Chicago

    Mandal, Ananya. "Mammogram, X-ray of the Breast". News-Medical. (accessed February 28, 2024).

  • Harvard

    Mandal, Ananya. 2023. Mammogram, X-ray of the Breast. News-Medical, viewed 28 February 2024,


The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
You might also like...
What led to a decline in US breast cancer mortality between 1975 and 2019?