Shoulder And Its Related Structures:a Comparative Study Between Cadaver Section And MR Imaging

Purpose The purpose of the study was to provide the anatomic data for imaging diagnosis of RC, GL, GHL, CLIL, and so on. We studied the location, size, shape and adjacent relationship as well as optimal slices, sequences and methods to demonstrate the structures above on MR imaging through comparison between cadaveric shoulder sections (the oblique sagittal , the oblique coronal and axial planes) and MR images. Materials and methods Four freshly amputated shoulder specimens without signs of arithitis or other abnormalities. Ti -weihted MR images were obtained on a 1 .0-T superconduct sign MR scanner for location of sections to be cut . According the position on the MR images, 40 shoulder specimens were then cut into slices which composed of 12 sets of transverse sections, 18 of coronal (parallel to the long axis of supraspinatus tendon) and 10 of sagittal (perpendicular to the long axis of supraspinatus tendon ) . On the sections, the origin, size, shape and adjacent relationship of RC, GL, LBT, GHL, CHL and its related structures were analyzed and measured. Meanwhile, 40 shoulder specimens MRJs of 20 normal adult individuals were obtained, 10 sets specimens of normal cadaver shoulder MRJs were obtained before and after injection of 1 5m1 of a solution diluted gadopentetate dimeglumine, which was made by mixing 1 ml of the contrast medium with 250m1 of normal saline. MR images were obtained with 1.0 scanner. According to the sections of the shoulder specimens, we concluded the location, signal, adjacent relations of the structures on the MR images of the normal shoulder. The shoulder MRIs of 60 normal adult individuals with pre-contrast and those of 10 post-contrast were compared with the corresponding sections on structures and statistics. Results : O.The long head of biceps starts in the joint, as a narrow tendon, running from the supraglenoid tubercle at the apex of the glenoidal cavity, and continuous here with glenoidal labrum. The tendon, enclosed in a double tubular sheath, is an extention of joint capsule抯 synovial membrane. At the middle of the LBT in the capsular of the shoulder joint, the traverse span is 8.94?1.26mm, vertical span is 3.88 ?0.66mm, in the intertubercular sculus, the traverse span is 6.5?1.67mm, the vertical span is 3.93 ?.85mm. LBT show low-signal-intensity on Ti-weighted MR images, the oblique sagittal plane can show the LBT in the capsular well, the axial plane show the LBT in the intertubercular sculus well, the effect of images was improved after injection of iSml of a solution diluted gadopentetate dimeglurnine, the images of P(D)WI sequence are more clear than the SE sequence. ?CHL, a broad thickening of the upper capsular region, descends lateral border of the coracoid boot to the front of great tubercle. Oblique coronal and axial planes show the Cl-IL well, the injection of the solution has no effect on the images. The P(D)WI sequence show the CHL better than SE sequence. ?GHL The shoulder has three GHL, each GHL has different planes that show its MRIs well. The SGHL passes along the medial edge of bicipital tendon to attachment above the lesser hurneral tubercle; the MGHL reaches the lower part of this tubercle. The LGHL extends to the lower part of the humeral anatomical neck, the LGHL consists of three components: the anterior and the post bands and the axillary ponch. The axial is the best plane that can be u...