This is a selected image from the coronal sequence. In the coronal sequence, images are perpendicular to the line of sight when viewing the supine patient from directly above. The coronal sequence displays this patient's narrow fascial planes, and the close proximity of the clavicles (C) with subclavius muscles (SUB) to the external jugular vein (XJ, only right side labeled) and the bicuspid valves within the subclavian veins (SV). This image clearly displays costoclavicular compression of the axillary veins (AXV), lateral to the bulbous expanded subclavian veins, on the first rib (FR). Note: The bulbous expansion of the subclavian veins is clearly visible above the first ribs in this image (large dark tubule structures identified by the labels SV). To fully understand this image, it is necessary to cross-reference the transverse and sagittal images.

A few labels have been placed on the image to assist with identification of landmark anatomy. The clavicles (C), subclavius muscles (SUB), external jugular vein (XJ), internal jugular vein (J), subclavian veins (SV), axillary veins (AXV), coracoid processes (CP), brachiocephalic artery (BR), first ribs (FR), trachea (T), right lung (RL), and left lung (LL) are labeled for reference. The aorta (A) and pulmonary artery (P) are labeled to identify the heart.

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