Final answer:
The lab test often performed with CT pulmonary angiography to rule out pulmonary emboli is D-dimer.
Step-by-step explanation:
The lab test often performed in conjunction with CT pulmonary angiography to rule out pulmonary emboli is D-dimer.
D-dimer is a protein fragment that is produced when a blood clot breaks down. Elevated D-dimer levels can indicate the presence of a blood clot in the body. CT pulmonary angiography is used to visualize the blood vessels in the lungs and detect any blockages caused by pulmonary emboli. By combining both tests, doctors can assess the likelihood of pulmonary embolism with greater accuracy.