They are particularly useful in looking at the brain, spine, and abdomen. Invasive procedures This is where doctors use scopes to look directly at the inside of organs. Scopes are also used in surgery. Invasive procedures can be used to inject medication to specific areas of the body. Specialists almost always perform these tests.
Patients require preparation for the procedures.
Biopsies often are taken, and it can be several days before the final results are known. Testing is an important part of your doctor's care. Diagnostic testing helps your doctor to pinpoint a current problem. Screening testing helps to avoid new problems. So it is important that the tests be done accurately and under the proper conditions.