Sports Medicine Thermography

Using Digital Infrared Thermal Imaging, DITI

Thermography1DITI has been shown to be useful as a diagnostic tool in the differential diagnosis of neuromusculoskeletal injuries and their prognosis for return to participation and/or competition.

Since DITI is noninvasive, risk-free, and relatively portable, it is a very practical tool in the clinical setting and may be used in the sports medicine clinic or chiropractic practice to assess injury and assists in our clinical decision making process.

How is DITI used for sport medicine injuries?

DITI not only helps confirm a diagnosis, but can be used as a gauge to clinically assess progress and treatment response, as well as a prognostic indicator.

What conditions is DITI (thermography) useful in diagnosing?

DITI is useful for, but not limited to, the diagnosis and evolution of:

  • Epicondylitis (painful inflammation of tendons, such as tennis elbow
  • Patellofemoral syndromes (pain in front of the knees)
  • Ankle injuries
  • shin splints
  • Stress fractures
  • Myofascial pain syndromes (pain on sensitive points in your muscles)
  • Spinal pain syndromes
  • Shoulder injuries
  • foot pain syndromes,
  • Vascular disorders.

One of DITI’s biggest contributions to sports medicine is in the detection of the post traumatic pain syndromes of reflex sympathetic dystrophy (complex regional pain syndrome) and sympathetic maintained pain syndromes, which can occur after minimal injury.  These have traditionally been difficult to diagnose.

DITI provides an invaluable window into the autonomic/sympathetic nervous system, which records via somato- cutaneous reflex, the sympathetic response to pain and injury.

Thermography2The controlling mechanism for thermal emission and dermal microcirculation is the sympathetic nervous system. There is a persistent vasomotor tone in the peripheral arterioles and precapillary sphincters. This tone allows the dermal vessels to stay in a partially constricted state so as to inhibit excess heat loss from a higher core temperature. The autonomic regulation involves synapse of preganglionic sympathetic fibers to postganglionic. The postganglionic fibers travel to vascular structures and modulate alpha receptor function in the dermal microcirculation.

When there is increased sympathetic function vasospasm will occur due to further vessel constriction and there will be decreased thermal emission at the cutaneous level. This may occur due to either increased postganglionic fibers function/irritation or hypersensitization of the alpha receptors in the dermal microcirculation allowing increased binding of catecholamines. Increased thermal emission will conversely be seen due to situations of decreased postganglionic function (such as seen in denervation) or alpha receptor blockade (receptor fatigue due to release of vasoactive substances such as substance P) .

The Pain Process and Management by DITI

Muscle, joint, osseous, ligament and nerve injuries all cause the patient to perceive pain. Pain sensation is carried by afferent stimulation of C-nociceptors. These unmyelinated fibers do have a percentage of sympathetics. Pain is then processed centrally and up to the brain via the spinothalamic tracts.

The patient may feel pain at the area of injury and at sites distant to the area of injury. This is called referred pain. Much research has been done documenting referred pain in myofascial syndromes and somatic visceral conditions. These referred pain zones are believed to be a somatocutaneous sympathetic response. They work via a common autonomic neural network. The somatosympathetic response can be imaged by DITI.

Pain is believed to be a neurogenic and autonomic response to injury and DITI findings have been found to correlate well to the patient’s report of painful areas and is well suited for diagnostic purposes in athletic injuries. DITI is not a picture of pain, however it is a picture of autonomic dysfunction which seems to correlate well with regions of pain.

Pain felt at the area of injury is generally seen to be hyperthermic (increased thermal emission) due to decreased sympathetic function and alpha receptor blockade from posttraumatic metabolic by-products.

Areas of referred pain are generally seen to be hypothermic (decreased thermal emission) due to increased sympathetic function.

Is DITI recognized by diagnostic agencies?

DITI has been recognized as a viable diagnostic tool since 1987. Recognizing agencies include:

  •  AMA council on scientific affairs
  •  ACA council on Diagnostic Imaging
  • Congress of Neurosurgeons in 1988
  •  American Academy of Physical Medicine and Rehabilitation in 1990.

A number of studies have been done to determine DITI’s examiner reliability and validity.

The National Institutes of Health (NIH) National Pain Consortium estimates that pain affects one third of the American’s population. Take action today to diagnosis and relieve your pain.

Call Serenity Health Care Center at 262-522-8640 to schedule an appointment.  DITI imaging is performed at Midwest Thermal Imaging.

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