Capsule for detection of gastrointestinal motility and method for preparing the same

A capsule, comprises

• a capsule enclosure and a present quantity of radiopaque markers filled in the capsule, wherein each radiopaque marker comprises
• a solid X-ray contrast agent selected from the group consisting of barium sulfate or bismuth salts and—present at least 10% by weight,
• a medical grade plastic with a density less than 1.4 g/cm3 present at least 35% by weight,
• and an auxiliary agent between 25%-35% by weight,
• wherein the capsule is configured to
• detect the motility of stomach, small intestine and colon by examining quantity and location of residual radiopaque markers, and wherein the radiopaque markers feature same appearances but different shapes under the X-ray medical images, by having the solid X-ray contrast agents in the radiopaque markers with different shapes or being placed in different locations;
• and the density of the radiopaque markers is between 1.0-1.7 g/cm3.