Abstract:While the medical thermography industry continues to grow, manufacturers
and sales representatives continually misrepresent facts about medical
thermography systems and thermography protocols in order to make sales to
unknowing buyers. This results in division within the field and must end.
Misrepresentation has become a more prevalent occurrence
in the medical thermal imaging field, especially among some makers of thermal
imaging equipment and their user groups.These misrepresentations, often made innocently by clinicians and
technicians who use certain types of thermal imaging systems, create industry
wide confusion and in some cases, contempt between various user groups at a
time when cooperation and sharing of data is critical to the continued growth
and development of our industry.
This derogatory and divisive activity must
stop.This purpose of this paper is to alert
all clinical thermographers, clinical thermography technicians and others
interested in the advancement of the industry to be aware of this problem in an
attempt to thwart future corruption of the thermal imaging industry.The fostering of communication and a fairness
doctrine within medical thermography is of the utmost importance to the continued
advancement of our industry and indeed to the safety and accurate diagnosis of
our patients.
As a senior educator in the field of medical
thermography, I have the opportunity to teach specialists from nearly all aspects
of the medical community. Questions from student thermographers and requests
for second opinion consultations coupled with specific inquiries from patients
themselves have brought this matter into critical focus.
It is now abundantly clear that the dissemination
of misinformation, often in order to sell a thermographic system to an end
user, has created confusion, doubt, and ill feelings between thermographers and
thermography patients as well.
We will now take a look at the most common
misrepresentations currently being made and examine not only the inaccuracy of
the statements themselves, but moreover, the impact that this might have on the
clinician and the patient. These misrepresentations are not presented in any
particular hierarchy of importance as all are weighted issues which confuse and
separate us.
Myth #1: “Our camera is specifically built for the
human temperature range and is not like military or industrial
cameras that other companies
sell.”
Fact:The U.S. FDA has approved approximately 20 infrared cameras
for medical use which are manufactured by
a
number of corporations.Some of these
cameras have the ability to measure a specific range of
temperature
which includes the human range, but can also exceed that range.An example would be the
ability
to measure the exhaust from a fighter aircraft.It is thus implied that one should not consider the
purchase
or use of a camera not built specifically for human range.Nothing could be further from the
truth.This “spin doctoring” technique is a crude
and simple “con” tactic designed to prevent potential
customers
from thoroughly investigating other devices.
With
the exception of certain specifically designed military infrared cameras, all
FDA approved medical
systems
can be set to measure only the human range.The reality is that cameras which are claimed to be
built
specifically for human range are typically very low cost cameras with very low
resolution detectors
that
just happen to “fit” the human temperature span.Higher resolution cameras are superior to
these
cameras.
The mere fact that they have passed FDA clearance is in itself a testament that
they are indeed
suitable
for human medical imaging.
Unfortunately, because many doctors and independent
technicians have unwittingly bought into such a sales pitch and marketing spinthey believe this statement to be true
and use these human range only cameras. They have been conditioned by the sales
pitch to have contempt for clinicians who may actually be using far superior
and more accurate infrared detector.
To summarize, this myth implies that only cameras
specifically designed for human range imaging are capable of doing so properly,
when in fact there are numerous systems on the market most of which are
superior and have been FDA approved specifically for this purpose. Furthermore, belief in this myth can create contempt
and disharmony within the thermographic community between different user
groups, especially when false claims and uninformed comparisons are made.
Myth #2: Cameras built specifically for the human
range negates the need to follow the “harsh” protocols of
outdated equipment.
Fact:Firstly,
the protocol for medical thermal imaging is not harsh. This is an extreme exaggeration.
Secondly,
there
are a number of very important thermal protocols that are required of both the
thermographic lab, and
the
patient. The lab protocols include but are not limited to such controls as:
a) Having
a properly designed thermal laboratory
b) Having
a draft-free environment
c) Maintaining
a specific room temperature (also known as stable ambient temperature)
d) Following
a specific preset thermographic analysis procedure
(A full discussion of lab protocols can be found on any responsible
medical thermography website,
many of which are listed at the end of this paper.)
These protocols are very easy to meet. However, I
have been informed by doctors of their skepticism in purchasing a certain camera
because they were led to believe that possible expensive office modifications
were needed to meet protocol. The reality is that most conventional office
environments today already meet the standard of care for thermal imaging.
In an effort to ease the system sale, this myth
implies that because the manufacturer’s camera is superior there is no need to
follow proper industry set protocols. Again, this is a false statement. The purpose
of laboratory protocol is to create an environment conducive to excellent image
capture of a patient who is neither trying to gain heat from or lose heat to
the environment. The camera, while sensitive to ambient change, has nothing to
do with the “thermal steady state of the patient” (i.e. human physiology).
Myth #3: Cameras built specifically for the human
range negates the need for patients to follow pre-
examination protocol.
Fact:There
are a number of important protocols for the patient to observe prior to their
examination.Some of
these
protocols are:
a)
Not smoking four hours prior to the examination
b)
Not consuming hot or cold beverages (especially those containing alcohol or
caffeine)
c) Not being sunburned
d)
Not shaving the area to be examined the morning of the exam, etc
(A full discussion of patient protocols can be found on any responsible
medical thermography website,
many of which are listed at the end of this paper.)
Depending on the experience of the sales associate,
this myth in particular seems to have been modified, in a variety of ways to
close the sale. Once again, the spin technique is designed to cause the client
to erroneously believe they are purchasing a superior system and can therefore
omit proper protocols.
Because of the statement, “our camera is built specifically
for the human range”, the assumption is made that the camera is so accurate the
protocols are outdated and unnecessary. Many thermographers assume the camera
is capable of overcoming the need for established and acceptable protocol.
Nothing can be further from the truth. Again, the function of a camera system cannot
affect human physiology.
The patient must be prepared and examined in
a thermal “steady-state” so that all possibilities of thermal artifact are
removed or limited.For example, if a
patient were sun burned it would be difficult to obtain temperatures of all
parts examined in the proper temperature ratio as the sunburned area would be
very hot and the surrounding normal tissue would appear excessively cold.
Another example would be the patient who wears
restrictive clothing such as a very tight brassiere, which can create
artifact.If a patient is not acclimated
to the room environment for the required amount of time, areas may appear
warmer or cooler than actual due to being artificially created by the restrictive
clothing. False analysis of the thermal image is then probable.
This spin is designed not only to make the camera
product seem superior, but can also very subtly and deceitfully imply that the
camera has a higher income generating capability. The inference is that by
speeding up the pre-exam requirements it facilitates more patients being seen
in the same length of time as those clinicians following acceptable protocol
techniques. This unethical implication builds false value into the camera
system’s sale price.
Myth #4: Other
cameras have the ability to measure extraneous heat.
Fact:As
mentioned above, thermal imaging cameras which have been approved by the U.S. FDA, have the ability
to
be set by the operator for specific ranges of temperature measurement.For example, the minimum
and
maximum temperature to be measured can be independently set.Also, the sensitivity of
temperature
measurement between various colors within the image can also be specifically
set. On the
On
the more advanced camera systems, the camera operator has the capabilities of setting
the temperature
range
and sensitivity not only specifically for the human range but also for each
individual patient if and
when
necessary.
This myth infers that the capability of measuring
heat from motors and hot gases such as from jet engines etc. when not used for
human physiology can confuse the thermal image data and in turn give false
information.
Myth #5:That
older thermographers ruined thermography due to the lack of understanding the
physics
of the technology and are responsible for the current inability to file
for insurance reimbursement due
to the revocation of CPT codes.
Fact:Thermography
exists today because of the continued and concerted efforts of those pioneers who
have
committed
themselves to the science and application of a very sound medical device.
Although the
technology has advanced, the science
remains unchanged. These advanced clinicians, who have obtained
legitimate
board certifications and Diplomate level credentials, certainly understand the
physics and are
capable of providing appropriate data to potential purchasers of thermal
imaging equipment. Of course,
since there is no vested interest, this independently sought information
would be provided without bias.
Unfortunately
as in many fields, thermography has had fraudulent practitioners who performed
the
procedure
improperly in order to further the cause of an automobile accident case or a
worker’s
compensation
injury. These unethical practices certainly damaged the credibility of the field;
however,
they
represent a small percentage of the thermographic industry.
Discussion:
These myths are among the most common andimportant of the complaints I routinely hear from current
thermography users, potential buyers and patients.No doubt, government inquiries into these
claims will follow.
One must realize, that with the exception of the
FDA 510K process for approval of medical thermal imaging systems, this industry
is virtually unregulated.Some would
argue that less regulation is desirous, but as in these circumstances it would
help protect against rogue thermography.
There are currently Doctors and Health Care
Practitioners who are interpreting thermograms with very little training. Often
this brief training is provided by the very manufacturer who wishes to maintaincontrol of the buyer and conceal the obvious flaws
in their paradigm and equipment. The same applies to some physicians involved
with interpretation services.
Physicians are unwittingly being pitted against one
another and creating distrust and confusion rather than being unified in a
technology that has multiple applications and tremendous possibilities, all for
the sake of sales and control of the industry. When physicians and technicians
do not communicate with one another about truths, dissention arises and growth
stops. False paradigms are perpetuated and in the end the patient is the one
who suffers.
Finally, there are many training programs in
medical thermal imaging.Some are
obviously more comprehensive and thorough than others. To my knowledge, with the exception of one program, all are open
to users of many different systems. These training programs emphasize
education, not sales, or stirring up dissention within the thermographic field.
I would like to make a call to all members of the
thermographic community to make every effort to unify our industry.
For
information on thermographic training and certification;
Academy of Medical Infrared Training
InternationalAcademy of Clinical Thermology
International Thermographic Society
AmericanAcademy of Thermology
American Academy of Medical Infrared Imaging (formerly the Hershel Society)