“… 16 , 17 , 18 Although US can be used to assess the alpha angle, 16 , 17 , 18 , 19 , 20 much of the literature regarding the use of US in hip arthroscopy has addressed arthroscopic portal placement. 21 , 22 , 23 , 24 , 25 Given the significant disadvantages of fluoroscopy, the use of US to assess the alpha angle intraoperatively and, thereby, the adequacy of cam resection is of substantial interest in the arthroscopic treatment of FAIS. The purpose of this technical article is to provide instruction and guidance on the use of intraoperative US to measure the alpha angle and determine the adequacy of cam resection.…”