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Which muscle must be included in mammography images?

  1. Pectoralis muscle

  2. Latissimus dorsi

  3. Rectus abdominis

  4. Deltoid muscle

The correct answer is: Pectoralis muscle

The pectoralis muscle is indeed essential to include in mammography images. This muscle lies beneath the breast tissue and plays a significant role in the positioning and interpretation of mammograms. Proper visualization of the pectoralis muscle helps radiologists assess the extent of breast tissue coverage in the images, ensuring that any abnormalities are not obscured. Additionally, its inclusion assists in accurately determining the breast density and the anatomical landmarks necessary for interpretation, which is crucial for detecting potential lesions or changes in breast tissue. Other muscles like the latissimus dorsi, rectus abdominis, and deltoid muscle may be located nearby but are not critical for the evaluation of mammographic images. Including the pectoralis muscle allows for a more comprehensive understanding of the breast anatomy during imaging.