We retrospectively reviewed and analyzed arthro-MRI exams of 23 patients (20 males and 3 females) who underwent arthro-MRI exam with a 1.5 Tesla device and arthroscopy within successive 2 months. All patients were athletes clinically suspected of ASI, positive to Palm-up, O’Brien and Hawkins tests. The shoulder was studied with dedicated coil in neutral, intra and extrarotated position. ABER position was used in 8 patients. Intra-articular injection of contrast agent (Gd-DOTA) was made under fluoroscopy. Artro-MRI protocol included proton density-weighted (PD-w) sequences with and without fat suppression acquired in sagittal, coronal and axial planes. MR parameters included: FOV = 16-18 cm, matrix = 256x256 and number of excitations (NEX) = 2. TE and TR were respectively of 13.5 and 1800 ms while slice thickness was 4.0 mm and slice gap 0.4 mm.