Which imaging study is sensitive for small pulmonary embolisms and may reveal other chest abnormalities?

Helical chest CT, also known as CT pulmonary angiography, is the most sensitive imaging study for detecting small pulmonary embolisms. This imaging modality is particularly advantageous because it allows for rapid acquisition of high-resolution images of the pulmonary vasculature. The three-dimensional images produced by helical CT can visualize the pulmonary arteries in detail, making it easier to identify emboli that may be missed with other imaging techniques.

In addition to assessing for pulmonary embolism, helical chest CT can also reveal other chest abnormalities, such as lung nodules, masses, and pleural effusions. This comprehensive diagnostic capability provides a broader clinical picture of the patient's thoracic pathology.

The other imaging modalities mentioned have their own specific uses but do not offer the same level of sensitivity for small pulmonary embolisms. For instance, a V/Q scan provides information about ventilation and perfusion in the lungs but is generally less sensitive than CT for the detection of small emboli and may not provide other diagnostic information about the lungs. Chest X-rays can show indirect signs of pulmonary embolism but are often unremarkable in early cases and cannot confirm the diagnosis. MRI, while useful in selected scenarios (such as evaluating cardiac or soft tissue problems), is not the standard imaging modality for pulmonary