What does capsule endoscopy involve?

Capsule endoscopy involves swallowing a small capsule that contains a camera. This non-invasive procedure allows for the imaging of the gastrointestinal tract, particularly the small intestine, which is often difficult to reach with traditional endoscopic methods. Once ingested, the capsule travels through the digestive system, capturing thousands of high-resolution images that are later transmitted to an external device for analysis. This technique is especially useful for diagnosing conditions such as Crohn's disease, small bowel tumors, and unexplained gastrointestinal bleeding.

The other options do not accurately describe capsule endoscopy. Injecting a camera or using a rigid scope involves more invasive procedures, such as endoscopy or colonoscopy, which require physical insertion of instruments into the body. Injecting dye for imaging pertains to techniques like fluoroscopy or CT scans, neither of which is representative of the capsule endoscopy process.