SAFE Imaging of Emitted Energy to Detect Pathology & Monitor Healing
Medical Infrared Imaging is a noninvasive diagnostic technique that allows the examiner to visualise and quantify changes in skin surface temperature. An infrared scanning device is used to convert infrared radiation emitted from the skin surface into electrical impulses that are visualized on a monitor. This visual image graphically maps the body temperature and is referred to as a thermogram. Since there is a high degree of thermal symmetry in the normal body, subtle abnormal temperature asymmetry's can be easily identified.
Medical thermography’s major clinical value is in its high sensitivity to pathology in the vascular, muscular, neural and skeletal systems and as such can contribute to the pathogenesis and diagnosis made by the clinician.
Medical thermal imaging has been used extensively in human medicine in the U.S.A., Europe and Asia for the past 40 years. Until now, cumbersome equipment has hampered its diagnostic and economic viability. Current state-of-the-art PC-based infrared technology designed specifically for clinical application has changed all this.
Clinical uses for thermal scanning include:
1. To define the extent of a lesion of which a diagnosis has previously been made;
2. To localize an abnormal area not previously identified, so further diagnostic tests can be performed;
3. To detect early lesions before they are clinically evident;
4. To monitor the healing process before the patient is returned to work or training.
Skin blood flow is under the control of the sympathetic nervous system. In normal people there is a symmetrical dermal pattern which is consistent and reproducible for any individual. This is recorded in precise detail with a temperature sensitivity of 1/100th of a degree.
The neuro-thermography application measures the somatic component of the sympathetic nervous system by assessing dermal blood flow. The sympathetic nervous system is stimulated at the same anatomical location as its sensory counterpart and produces a 'somato sympathetic response'. The somato sympathetic response appears on a thermogram as a localised area of altered temperature with specific features for each anatomical lesion.
The mean temperature differential in peripheral nerve injury is 1.5 C. In sympathetic dysfunction (RSD / SMP / CRPS), temperature differentials range from 1 C to 10 C depending on severity.
Rheumatological processes generally appear as 'hot' areas with increased temperature patterns. The pathology is generally an inflammatory process, i.e. synovitis of joints and tendon sheaths, epicondylitis, capsular and muscle injuries, etc.
Both hot and cold responses may coexist if the pain associated with an inflammatory focus excites an increase in sympathetic activity. Vascular conditions are readily demonstrated by DITI including Raynauds disease, Vasculitis, Limb Ischemia, DVT, etc.
X ray, C.T., Ultrasound and M.R.I. etc., are tests of anatomy. E.M.G. is a test of motor physiology. Thermography (Digital Infrared Thermal Imaging - DITI) is unique in its capability to show physiological change and metabolic processes. It has also proven to be a very useful complementary procedure to other diagnostic modalities.
Unlike most diagnostic modalities thermography is non invasive. It is a very sensitive and reliable means of graphically mapping and displaying skin surface temperature. With thermography you can evaluate, monitor and document a large number of injuries and conditions, including soft tissue injuries and sensory/autonomic nerve fiber dysfunction.
Medical infrared can offer considerable financial savings by avoiding the need for more expensive investigation for many patients. However, we will not hesitate to refer you to further testing if we see cause and we always encourage you to address any issues with your healthcare provider.
Medical Infrared can show a combined effect of the autonomic nervous system and the vascular system, down to capillary dysfunctions. The effects of these changes show as asymmetry's in temperature distribution on the surface of the body.
Medical Infrared is a monitor of thermal abnormalities present in a number of diseases and physical injuries. It is used as an aid for diagnosis and prognosis, as well as therapy follow up and rehabilitation monitoring, within clinical fields that include rheumatology, neurology, physiotherapy, sports medicine, oncology, pediatrics, orthopedics and many others.
Results obtained with medical infrared systems are totally objective and show excellent correlation with other diagnostic tests.
(reprinted from site of The American College of Clinical Thermology)