How Is a Mammogram Done: Positioning for Technologists

The digital mammography procedure step by step

The technologist explains the procedure, confirms history and asks the patient to undress to the waist. Each breast is positioned on the detector support, the arm is adjusted to the correct height and angle, and the technologist brings the breast forward so that as much tissue as possible is included.

Compression is then applied, the patient is asked to hold still and not breathe for the exposure, and the image is acquired. The technologist checks image quality on the acquisition station before releasing compression. Repeating for the second breast and second view completes the standard examination.

CC and MLO views and positioning quality

The CC view images the breast from above, with the nipple in profile where possible. The MLO view is taken at an oblique angle and includes the upper outer tissue and part of the axilla. Together they allow the radiologist to locate findings in three dimensions.

Good positioning is a skill: the pectoral muscle should be visible on the MLO, the nipple in profile, and the inframammary fold open. Additional views, such as spot compression or magnification, are used for problem solving. Position-related repeats are a quality indicator to audit regularly.

• CC: craniocaudal view from above
• MLO: mediolateral oblique view
• Additional views: spot, magnification, lateral
• Audit repeat rate and its causes

Compression: force, time and comfort

Compression reduces thickness, motion blur and dose and separates overlapping tissue, but it is the part patients most worry about. Explaining why it is needed, applying it progressively and giving clear instructions reduces anxiety.

Equipment features help. The Villa Melody IIID uses decremental compression with Smart Micro Press, a fully motorised isocentric C-arm and dual touchscreen control panels, which the manufacturer lists among its features for accurate and comfortable examinations. Technique and communication still matter most.

3D mammogram: how is it done, and how long does it take

For a 3D mammogram the positioning and compression are the same as for 2D. During the scan the tube moves in an arc while the breast stays compressed. On the Melody IIID TS the manufacturer lists scan times of 2.5, 4 and 7.7 s with the Fast a-Se detector, so each exposure is short.

The whole appointment length depends on the facility workflow, number of views and registration. Is tomosynthesis painful? Compression is the main source of discomfort in both methods, and tomosynthesis uses compression similar to 2D. Learn more in digital breast tomosynthesis explained.

Training, workflow and next steps for clinics

Provide structured technologist training in positioning, run image-quality audits and use phantoms for regular checks. Schedule enough time per patient for explanation and repeat views, and make sure the room, privacy and gown arrangements are appropriate.

For related technical background see how a mammography machine works. If you plan to equip or upgrade a breast imaging room, Beckfinity's specialists can discuss options, including the Melody IIID.