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This is a selected image from the transverse sequence.
In the transverse sequence, images are perpendicular to the line of
sight when viewing the supine patient from the soles of the feet
toward the head.
The transverse sequence displays this patient's narrow fascial
planes, costoclavicular compression of the axillary veins
lateral to the subclavian veins (SV) on the first ribs, acute
backward displaced subclavian arteries with binding nerve roots,
the first division of the right subclavian artery effacing the bicuspid
valve within the internal jugular vein as it acutely angles posterior
to the right anterior scalene muscle, and the anterior rotated clavicle
compressing the bicuspid valve within the left internal jugular vein.
This image clearly displays the close proximity of the clavicles (C,
only right one labeled) with subclavius muscles (SUB, only left one labeled)
to the axillary veins (lateral to the subclavian veins, SV),
compressing the external jugular veins (XJ) against the bulbous expanded
subclavian veins (SV), on the first ribs, against the anterior scalene
muscles. Note: The bulbous expansion of the subclavian veins is
clearly visible in the image (large dark tubule structures identified by the
labels SV). To fully understand this image, it is necessary to
cross-reference with the coronal and sagittal images.
A few labels have been placed on the image to assist with
identification of landmark anatomy. The clavicle (C), subclavius
muscle (SUB), subclavian veins (SV), brachiocephalic artery (BR),
brachiocephalic vein (BRV), trachea (T),
right lung (RL), and left lung (LL) are labeled for reference.
The first division of the right subclavian artery is not
visible in this image, but it lies between the brachiocephalic
vein (BRV) and the trachea (T) in an adjacent image in this sequence.