Robert Wood Johnson University Hospital
 

Diagnostic Imaging

Cancer Diagnosis - Diagnostic Imaging

How is cancer diagnosed?

There is no single test that can accurately diagnose cancer. The complete evaluation of a patient usually requires a thorough history and physical examination along with diagnostic testing. Many tests are needed to determine whether a person has cancer, or if another condition (such as an infection) is mimicking the symptoms of cancer. Effective diagnostic testing is used to confirm or eliminate the presence of disease, monitor the disease process, and plan for and evaluate the effectiveness of treatment. Tests may be for staging, to determine the extent of cancer and if it has spread, or they may be done to assess prognosis or select specific therapies. In some cases, it is necessary to repeat testing when a person’s condition has changed, or if a sample collected was not of good quality, or an abnormal test result needs to be confirmed. Diagnostic procedures for cancer may include imaging, laboratory tests (including tests for tumor markers), tumor biopsy, endoscopic examination, surgery, or genetic testing. Tests are often repeated regularly thoughout treatment to re-stage, that is, to determine the effectiveness of treatment and the cancer's response to it.

What are the different types of diagnostic imaging?

Imaging is the process of producing valuable pictures of body structures and organs. It is used to detect tumors and other abnormalities, determine the extent of disease, and evaluate the effectiveness of treatment. Imaging may also be used when performing biopsies and other surgical procedures. There are three types of imaging used for diagnosing cancer: transmission imaging, reflection imaging, and emission imaging. Each uses a different process:

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