Final answer:
To visualize the sesamoid bones of the toes free of superimposition, the tangential projection requires the foot to be dorsiflexed 10-15 degrees from vertical. Therefore, the correct option is 2.
Step-by-step explanation:
The tangential projection is a radiographic technique used to obtain an optimal view of the sesamoid bones in the toes. Sesamoid bones are small, embedded bones within tendons, and capturing clear images of them can be challenging due to their location. Dorsiflexion involves bending the foot upward toward the shin, and in the case of this projection, it is essential to dorsiflex the foot within the specified range of 10-15 degrees from the vertical plane.
This specific degree of dorsiflexion is crucial for achieving the desired separation and clarity of the sesamoid bones. It minimizes superimposition, where the bones overlap and hinder a clear view. Radiologic technologists use their expertise to ensure that the patient's foot is positioned correctly during the imaging process. Proper dorsiflexion enhances the diagnostic quality of the X-ray image, aiding healthcare professionals in assessing the sesamoid bones for any abnormalities or conditions affecting the toes.
Therefore, the correct option is 2.