In radiography, what is the purpose of placement of a marker on the image?

• A. To indicate laterality, view, or technique used.
• B. To provide patient identification.
• C. To mark exposure level.
• D. To show the time of day.

Answer: (A)

Markers on radiographic images convey where the anatomy is and how it was captured. They indicate which side of the patient is shown (left or right) and what view or projection was used (for example, AP, PA, lateral, oblique) or any particular technique notes. This orientation information is essential to interpret the image accurately and to compare it with prior studies or other views. A marker is not meant for patient identification, nor does it indicate exposure level or the time of day. Placing markers correctly helps prevent misinterpretation or right–left errors and keeps the documentation clear and consistent.