Sometimes, dyspepsia is a more sudden, noticeable (acute) sensation. Depending on the cause of the dyspepsia, people may have other symptoms such as a poor appetite, nausea, constipation, diarrhea, flatulence, and belching. For some people, eating makes symptoms worse. For others, eating relieves symptoms.
An X-ray machine is essentially a camera. Instead of visible light, however, it uses X-rays to expose the film. X-rays are like light in that they are electromagnetic waves, but they are more energetic so they can penetrate many materials to varying degrees.
X-rays allow doctors to look at a patient's internal structure from one, two-dimensional angle. CT scans, on the other hand, use a computer to compile X-rays and create a multidimensional view. Computer programs are used to assemble the X-rays in a way that reflects the structure within a patient's body.