Final answer:
The projection name for the Gaynor-Hart method is d. Tangential. It is used to evaluate the carpal canal and is particularly beneficial in diagnosing conditions like carpal tunnel syndrome.
Step-by-step explanation:
The projection name for the Gaynor-Hart method performed to evaluate the carpal canal is d. Tangential. This radiographic technique is designed to provide clear imaging of the carpal tunnel, which is essential for diagnosing conditions like carpal tunnel syndrome.
In the Gaynor-Hart method, the hand is positioned in a way such that the x-ray beam skims along the carpal tunnel, providing a tangential view of the flexor retinaculum and the carpal bones. This imaging is crucial for assessing any abnormalities or changes in the morphology of the carpal canal which might be contributing to symptoms experienced by a patient.