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Fig. 1B —58-year-old man who presented to emergency department with
acute chest pain. Righted-sided pulmonary arterial circulation (A) and
left-sided pulmonary arterial circulation (B) coronary CT scans show
mean contrast enhancement (HU) of pulmonary arterial segments. Mean vessel
opacification decreases in craniocaudal direction as contrast agent passes
from pulmonary to systemic circulation during dedicated cardiac MDCT
acquisition. apic = apical; seg = segment; ant = anterior; post = posterior;
rul = right upper lobe; rpa = right pulmonary artery; rll = right lower lobe;
rml = right middle lobe; sup = superior; med = medial; lat = lateral; lul =
left upper lobe; lpa = left pulmonary artery; lll = left lower lobe; ling =
lingula; inf = inferior.
