What is the projection name for the Gaynor-Hart method performed to evaluate the carpal canal?

The Gaynor-Hart method is specifically designed to evaluate the carpal canal, which contains important structures such as the median nerve and the flexor tendons. This method utilizes a tangential projection to achieve the desired view, which allows for a focused look at the carpal tunnel and associated anatomy without interference from other structures in the wrist.

In a tangential projection, the X-ray beam is directed at the area of interest with an angle that skims the surface of the structure being examined, highlighting its contours. This approach is especially useful in assessing conditions like carpal tunnel syndrome or other pathologies within the carpal canal. The positioning required for the Gaynor-Hart method maximizes visualization of the carpal bones and the space available for the adjacent soft tissues, thereby providing clear diagnostic information.

Understanding projections like this is essential for accurately interpreting X-ray images, and it illustrates the importance of choosing the correct technique based on the anatomy of interest.