Patient preparation for the mammography exam includes the following:

Patient preparation for a mammography exam is crucial to ensure accurate results and patient comfort. The correct answer encompasses all the key aspects of preparation.

Location of prior exams provides valuable information to the radiologist. Having access to previous images allows for better comparison and assessment of any changes over time, which is vital in detecting potential abnormalities.

Reason for the exam is also important as it helps the technologist understand the patient's specific concerns or symptoms, guiding them to focus on areas that may require additional attention. This context can lead to more tailored imaging that directly addresses the patient's needs.

Scheduling an appointment when the breasts are not swollen or tender is a practical consideration for patient comfort. Hormonal fluctuations, particularly around the menstrual cycle, can lead to breast tenderness and swelling, which may make the mammography uncomfortable. This is why it is advised to schedule the exam at a time when the breasts are least sensitive.

Therefore, all of these factors contribute to optimal patient preparation, making "All of the above" the most comprehensive and correct choice.