One other study demonstrated that fluoride PET can demonstrate acetabular contrecoup injuries in patients with FAI [51]. However, increased radiotracer uptake is a nonspecific finding, and, overall, there is insufficient literature to support the use of fluoride PET/CT skull base to mid-thigh in the evaluation of chronic hip pain thought to be due to hip impingement and/or dysplasia. Chronic Hip Pain MR Arthrography Hip Direct MR arthrography, performed following the intra-articular injection of a 1:200 solution of gadolinium chelate in saline, is useful for diagnosing acetabular labral tears [65-70] that are frequently associated with FAI [71,72] and/or hip dysplasia. MR arthrography has been shown to have a sensitivity of 94.5% and a specificity of 100% for the detection of labral tears [52], which may be associated with FAI. Some authors have shown that MRI without IV contrast and MR arthrography are similarly accurate and sensitive for detecting labral tears in the setting of FAI [53], and other authors have shown that MR arthrography is superior to conventional MRI [54,55]. Several publications show that MR arthrography is superior to CT arthrography and noncontrast MRI for evaluation of labral tears [18,56], but there are other publications that demonstrate that CT arthrography and noncontrast MRI are superior [16,57-59]. MR arthrography may also nicely demonstrate acetabular chondral delamination [60]. Although MR arthrography can be useful for demonstrating labral and chondral pathology associated with impingement, the presence of intra-articular contrast offers no advantage over noncontrast MRI for the detection of extra-articular abnormalities associated with impingement. MRI Hip Without and With IV Contrast Indirect arthrography is a technique that falls under the category of MRI hip with contrast. When administered intravenously, gadolinium chelate contrast can diffuse into the joint space via the synovium, and this results in indirect arthrography.
Chronic Hip Pain PCAs. One other study demonstrated that fluoride PET can demonstrate acetabular contrecoup injuries in patients with FAI [51]. However, increased radiotracer uptake is a nonspecific finding, and, overall, there is insufficient literature to support the use of fluoride PET/CT skull base to mid-thigh in the evaluation of chronic hip pain thought to be due to hip impingement and/or dysplasia. Chronic Hip Pain MR Arthrography Hip Direct MR arthrography, performed following the intra-articular injection of a 1:200 solution of gadolinium chelate in saline, is useful for diagnosing acetabular labral tears [65-70] that are frequently associated with FAI [71,72] and/or hip dysplasia. MR arthrography has been shown to have a sensitivity of 94.5% and a specificity of 100% for the detection of labral tears [52], which may be associated with FAI. Some authors have shown that MRI without IV contrast and MR arthrography are similarly accurate and sensitive for detecting labral tears in the setting of FAI [53], and other authors have shown that MR arthrography is superior to conventional MRI [54,55]. Several publications show that MR arthrography is superior to CT arthrography and noncontrast MRI for evaluation of labral tears [18,56], but there are other publications that demonstrate that CT arthrography and noncontrast MRI are superior [16,57-59]. MR arthrography may also nicely demonstrate acetabular chondral delamination [60]. Although MR arthrography can be useful for demonstrating labral and chondral pathology associated with impingement, the presence of intra-articular contrast offers no advantage over noncontrast MRI for the detection of extra-articular abnormalities associated with impingement. MRI Hip Without and With IV Contrast Indirect arthrography is a technique that falls under the category of MRI hip with contrast. When administered intravenously, gadolinium chelate contrast can diffuse into the joint space via the synovium, and this results in indirect arthrography.