Why Thermography?

What is Thermography?

Thermography is the measurement of temperature variations at the body surface. When used in a clinical setting, it is an imaging procedure that detects, records, and produces an image (thermogram) of a patient’s skin surface temperatures and/or thermal patterns. The procedure uses equipment that can provide both qualitative and quantitative representations of these temperature patterns. Thermography does not entail the use of ionizing radiation, venous access, or other invasive procedures; therefore, the examination poses no harm to the patient and is completely safe. Clinical thermography is a physiologic imaging technology that provides information on the normal and abnormal functioning of the sensory and sympathetic nervous systems, vascular system, musculoskeletal system, and local inflammatory processes. The procedure also provides valuable diagnostic information regarding dermatologic, endocrine, and breast conditions.

What exactly is the difference between mammography, ultrasound, and thermography?

There seems to be some confusion on this subject by thinking that one test replaces the other. Nothing could be further from the truth. Both mammography and ultrasounds are structural (anatomical) tests, while thermography is a functional (physiological) test. None of these tests are truly diagnostic technologies. Thermography images the breast and surrounding area and provides us with a risk assessment, while mammography and ultrasound detect structural abnormalities. If a breast abnormality is found that could possibly be malignant, a biopsy is performed. A biopsy removes a tissue sample for examination under a microscope.
Many women utilize thermography as a first step in breast health care, as it is non-invasive, radiation free and safe. After their initial assessment with thermography, if there seems to be a medium to high risk assessed, a woman may be asked to follow up either with an ultrasound or mammogram or both to rule out any existing pathology.
Frequently, some will be relieved that their mammogram or ultrasound test results show no abnormal findings, however this does not necessarily mean that nothing is going on with their breasts. Several other factors may be contributing to a high risk (abnormal) thermogram, such as: hormonal imbalance, early angiogenesis (proliferation of blood vessels), lymphatic swellings and poor function and other contributing factors – all these are important contributors to breast disease and malignancy and are not detected by mammography or ultrasound as these factors do not appear as structural changes.
The following is a list comparing all three types of tests with their pros and cons:

Mammography:

  • Structural test: can pinpoint the location of suspicious area.
  • Compresses the breast.
  • X-ray radiation produces an image; the area of concern must have greater density to stand out against regular tissue.
  • Can detect tumors in mainly slow growing stage or pre-invasive stage.
  • Cannot detect fast growing tumors in the pre-invasive stage.
  • Large, dense, and fibrocystic breasts are difficult to read.
  • The upper portions of the breast including the tail of the breast and the Axillary region cannot be visualized.
  • Can detect tumors 1-2 years earlier than physical examination.
  • Average Specificity 75% (25% false-positive) 9 out of 10 biopsies initiated by mammography are negative.
  • Average Sensitivity 80% with 20% of cancers missed in women over age 50; in women under age 50 Sensitivity is 60% or 40% of cancers missed.

Ultrasound:

  • Structural test that can pinpoint the location of suspicious area.
  • Uses sound waves with moderate contact.
  • High frequency sound waves are bounced off the breast tissue and collected as an echo to produce an image.
  • Able to detect some tumors missed by mammography.
  • No data available on detecting pre-invasive tumors.
  • May be affected by the hormonal influence due to the menstrual cycle, (i.e., cystic changes)
  • All areas of the breast and Axillary region can be analyzed.
  • Good for distinguishing between solid and fluid masses, helpful in investigating an area of concern due to mammography, thermography or physical examination findings.
  • Average Specificity 66% (34% false positive)
  • Average Sensitivity 83% (17% of cancers missed)

Thermography:

  • Functional testing, able to detect physiological changes, cannot pinpoint the exact location of suspicious area.
  • No radiation, non-invasive, no risk, can be used as often as necessary to observe the effectiveness of treatment over time.
  • Uses infrared detectors to detect heat and increased vascularity that may be related to angiogenesis.
  • Can detect physiological changes many years prior to any other method of screening.
  • Very sensitive to fast growing aggressive tumors.
  • Hormonal activity in the breast will affect thermographic imaging but not to the point of abnormality.
  • All breast shapes, conditions and areas are within the scope of imaging.
  • Earliest warning system with breast tissue and physiological changes that usually precedes tumor formation years prior to its occurrence.
  • Average Specificity 90% (10% false positive)
  • Average Sensitivity 90% (10% cancers missed) most of these are slow growing tumors with low metabolic rate in the area with a high rate of survival.