There are over 110 diagnostic tests and procedures currently in use. They are used to detect diseases and to monitor their progression. In addition, diagnostic tools and equipment are also used to guide treatment and evaluate its effectiveness.
Diagnostic tests are invasive and non-invasive. Invasive diagnostic tests involve piercing the skin or entering the body. Examples are taking a blood sample, biopsies, and colonoscopies. Non-invasive diagnostic tests do not involve a break in the skin.
Imaging procedures are prime examples of non-invasive diagnostic test procedures. Non-invasive diagnostic tests generally involve the use of highly advanced diagnostic equipment that creates images of organs, soft tissues, and bones within the body without having to make an incision. Non-invasive diagnostic test tools are often used to determine if more invasive procedures are needed to make a diagnosis.