What Is Thermography


Overview of  Digital Infrared Thermal Imaging


Medical DITI 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 visualised   in colour on a monitor. This visual image graphically maps   the body temperature and is referred to as a thermogram. The   spectrum of colours indicate an increase or decrease in the   amount of infrared radiation being emitted from the body surface.   Since there is a high degree of thermal symmetry in the normal   body, subtle abnormal temperature asymetry's can be easily   identified.
 

Medical DITI'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 DITI has been used extensively   in human medicine in the U.S.A., Europe and Asia for the past   20 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 DITI include;
 

1. To define the extent of a lesion   of which a diagnosis has previously been made;
   2. To localise 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 0.1??C by DITI.
 

The neuro-thermography application of   DITI 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 DITI 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's   (RSD / SMP / CRPS) temperature differentials ranging from   1?? C to 10?? C depending on severity are not uncommon. 
 

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. Also, vascular conditions   are readily demonstrated by DITI including Raynauds disease,   Vasculitis, Limb Ischemia, DVT, etc.
   Medical DITI is filling the gap in clinical diagnosis ... 
 

X ray, C.T. Ultrasound and M.R.I. etc.,   are tests of anatomy. E.M.G. is a test of motor physiology.   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 DITI   is non invasive. It is a very sensitive and reliable means   of graphically mapping and displaying skin surface temperature.   With DITI you can diagnosis, evaluate, monitor and document   a large number of injuries and conditions, including soft   tissue injuries and sensory/autonomic nerve fibre dysfunction.
 

Medical DITI can offer considerable   financial savings by avoiding the need for more expensive   investigation for many patients.
 

Medical DITI can graphically display   the very subjective feeling of pain by objectively displaying   the changes in skin surface temperature that accompany pain   states.
 

Medical DITI 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.
 
 
Results obtained with medical DITI systems   are totally objective and show excellent correlation with   other diagnostic tests.