Which of the following is used for a chest x-ray?

A CT scan, or computed tomography scan, utilizes a series of X-ray images taken from different angles and processes them using computer technology to create cross-sectional images of bones, blood vessels, and soft tissues. While CT scans can provide detailed images of the chest, they are not the standard method for routine chest x-rays, which are typically performed using simple radiography.

Angiography is a medical imaging technique used specifically to visualize the inside of blood vessels and organs of the body, particularly to identify blockages or abnormalities. It involves injecting a contrast dye into the bloodstream and taking X-ray images. Although it may involve the chest area, it is not used for general chest x-rays, which do not focus solely on blood vessels.

Fluoroscopy is a technique that provides real-time moving images of the interior of the body using X-rays. It is often used for observing the function of organs and systems, such as the gastrointestinal tract. While it has applications in examining the chest, it is not the standard for chest x-rays, which are static images taken for diagnostic purposes.