Which of the following technologies is primarily used for viewing lung diseases?

The primary technology used for viewing lung diseases is the CT scan. This imaging technique provides detailed cross-sectional images of the body and is particularly useful for assessing lung structures. CT scans are highly effective for detecting various lung conditions, including tumors, pulmonary embolisms, and interstitial lung disease, due to their ability to produce highly detailed images that reveal the fine details of lung anatomy and pathology.

While X-rays are often used for initial evaluation of lung diseases, they offer less detail compared to a CT scan and can miss smaller lesions or subtle changes in lung condition. An MRI is generally not the first choice for lung imaging, as it is less effective in visualizing the lungs compared to CT scans. Ultrasound has limited use in assessing lung diseases, primarily used for evaluating pleural effusions or guiding procedures but not for detailed visualizations of lung tissue itself.

Overall, the versatility and detail offered by CT scans make them the preferred modality for in-depth examination of lung diseases, thus confirming their appropriateness for this purpose.