Advanced Patient Assessment Practice Exam

Which of the following studies is gradually replacing scanning for the diagnosis of pulmonary embolus?

1. CT angiography

2. MRI

3. Lung scanning

4. CT scanning

The correct answer is: CT angiography

The gradual replacement of traditional lung scanning for the diagnosis of pulmonary embolism is largely due to the advancements and increased use of CT angiography. This imaging technique provides a detailed view of the blood vessels in the lungs and allows for the direct visualization of clots within the pulmonary arteries. CT angiography has several advantages over lung scanning, including higher sensitivity and specificity rates, which enhances the ability to accurately diagnose pulmonary embolism. It also allows for a quick and non-invasive examination, making it particularly useful in emergency settings where timely diagnosis is crucial. By using iodine-based contrast agents, CT angiography highlights the blood vessels, enabling clinicians to see the flow of blood and identify any obstructions caused by emboli. This immediacy and clarity often make CT angiography the preferred choice compared to other modalities, contributing to its status as the standard in diagnosing pulmonary embolism.