Show Citation, DOI & article dataCitation: Murphy, A. Shoulder (lateral scapula view). Reference article, Radiopaedia.org. (accessed on 13 Sep 2022) https://doi.org/10.53347/rID-48252 The lateral scapula shoulder or Y view is part of the standard shoulder series. On this page:Orthogonal to the AP shoulder (note: as is an axillary view); this view is a pertinent projection to assess suspected dislocations, scapula fractures, and degenerative changes. It is also useful in seeing both the coracoid and acromion process in profile.
The lateral scapula projection can be technically demanding, especially when patients are in pain. An anecdotal method amongst radiographers is to feel for the medial border of the scapula and line it up with the anterior portion of the acromion and x-ray straight down the line. The idea being, if they are lined up there will be a superimposition of the medial and lateral borders of the scapula and hence a perfect lateral position, although this isn't always the case. The best defense against positional errors is having a thorough understanding of radiographic anatomy and how it changes positionally when assessing for under/over rotation of the lateral shoulder, assess the borders of the scapula. Over rotationOver rotation in this projection refers to the patient's unaffected side sitting too far away from the image receptor, otherwise known as lying ‘too square’ to the detector. Over-rotation is clearly established as the lateral border of the scapula (significantly thicker than the medial) is projected over the thorax along with the humeral head; to adjust this, rotated the unaffected side towards the image receptor slightly. Under rotationUnder rotation in this projection refers to the patient's unaffected side sitting too close to the image receptor, otherwise known as lying ‘flat’ to the detector. The lateral border, as well as the humeral head, will be sitting overly lateral in the image; to fix this, rotated the unaffected side away from the detector to increase obliquity. Some departments will recommend a 15-degree caudal angle to achieve the ‘perfect’ lateral shoulder; it should be noted this is an entirely different projection known as an ‘outlet projection’ used primarily for the visualization of the supraspinatus outlet; often aiding in the investigation of impingement, spurs and calcifications. ReferencesRelated articles: Imaging in practicePromoted articles (advertising)Which patient position can be used to demonstrate the left scapula in a lateral perspective?The supine lateral view is performed to identify dislocations and scapula fractures when patients are unable to stand or sit for shoulder imaging but able to roll whilst being supine. If patients are unable to roll, the modified supine lateral view can be performed instead.
What are the routine projections for a trauma shoulder?Routine radiographic projections for imaging of the acute shoulder include the AP with an additional projection; either a lateral of the scapula and proximal humerus (LS) or an axial projection of the shoulder. 2e4 The AP projection is a key component of the routine trauma shoulder series.
What is lateral to scapula?The lateral angle of the scapula or glenoid angle also known as the head of the scapula is the thickest part of the scapula. It is broad and bears the glenoid fossa on its articular surface which is directed forward, laterally and slightly upwards, and articulates with the head of the humerus.
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