Canine shoulder CT and CT arthrography

Raimonda Uosyte, Henrique Reis Silva, Dylan Clements, Guraa Bergkvist, Tobias Schwarz

Research output: Contribution to conferenceAbstractpeer-review

Abstract / Description of output

High-field-strength MRI has become the gold standard for imaging of the canine shoulder joint (1, 2, 3). However this remains an expensive, time consuming procedure with limited availability. Computed tomography has been shown to be effective for the canine shoulder (4). There is currently no information available regarding the optimal positioning and arthographic contrast medium concentration for shoulder CT. It has not been described which relevant anatomic structures can be identified.
To identify relevant anatomic structures of the shoulder region in different joint angles with and without positive contrast medium arthrography. To determine the optimal contrast medium concentration for CT-arthrography.
Materials and Methods:
9 cadaver thoracic limbs from dogs without previous history of thoracic limb lameness were used. Test tubes with 10 ml of non-ionic iodinated contrast medium in concentration of 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100mg I/ml were scanned and evaluated for optimal brightness. The optimal concentration was used for shoulder CT-arthrography. Shoulders were imaged with a helical 4-slice CT with bone and soft tissue algorithm in 3 different angles (140° extension, 90° neutral, 70° flexion) as survey CT and CT-arthrography. The anatomic structures of the shoulder region were scored for image detail. Curvilinear reconstructions of the biceps tendon were performed to demonstrate its relationship with neighbouring structures.
60mg I/ml was determined as the optimal concentration. The muscles of the shoulder region were visible in all angles, but best in extension. Only CT-arthrography provided excellent visualisation of the subscapularis tendon insertion, medial, lateral glenohumeral and transverse humeral ligaments. Curvilinear biceps tendon reconstructions demonstrated an impinging effect of the supraspinatus tendon on the biceps tendon in the flexed position.
CT provides excellent detail for imaging of the canine shoulder joint. The extended position is most beneficial allowing maximal image detail and avoiding positional artefacts which could be confused with tendon pathology. Using CT-arthrography at 60mg I/ml, excellent visualisation of the shoulder ligaments can be achieved.

Original languageEnglish
Number of pages1
Publication statusPublished - 2012
Event16th IVRA Meeting & EVDI Annual Meeting - Bursa, Turkey
Duration: 26 Aug 20121 Sept 2012


Conference16th IVRA Meeting & EVDI Annual Meeting


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