Swallowable camera pill provides imaging of esophageal lining

The video tutorial explains the process of capturing cross-sectional and 3D images of the upper gastrointestinal tract using a pill-sized device. The patient swallows the device, which is then moved through the esophagus to capture images. The device employs a laser to scan its surroundings, and the imaging equipment tracks the laser's reflectance. This process results in a 3D image and a reconstruction of the esophagus.

What role does the reflectance of the laser beam play in the imaging process?

Explain how the 3D images of the esophagus are created from the scans.