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Problems of Active Dynamic Thermography Measurement Standardization in Medicine

Nowakowski Antoni

Pomiary Automatyka Robotyka

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2021

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R. 25, nr 3

51--56

EN

Reliability of thermographic diagnostics in medicine is an important practical problem. In the field of static thermography, a great deal of effort has been made to define the conditions for thermographic measurements, which is now the golden standard for such research. In recent years, there are more and more reports on dynamic tests with external stimulation, such as Active Dynamic Thermography, Thermographic Signal Reconstruction or Thermal Tomography. The subject of this report is a discussion of the problems of standardization of dynamic tests, the choice of the method of thermal stimulation and the conditions determining the credibility of such tests in medical diagnostics. Typical methods of thermal stimulation are discussed, problems concerning accuracy and control of resulting distributions of temperature are commented. The best practices to get reliable conditions of measurements are summarized.

PL

Wiarygodność diagnostyki termograficznej w medycynie stanowi ważny problem praktyczny. W zakresie statycznej termografii w podczerwieni włożono sporo wysiłku, by zdefiniować warunki pomiarów termograficznych, co stanowi obecnie złoty standard takich badań. W ostatnich latach pojawia się coraz więcej doniesień dotyczących badań dynamicznych z pobudzeniem zewnętrznym, takich jak ADT, TSR czy tomografia termiczna. Przedmiotem niniejszego doniesienia jest dyskusja problemów standaryzacji badań dynamicznych, wyboru sposobu pobudzenia termicznego i warunków decydujących o wiarygodności takich badań w diagnostyce medycznej.

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Thermal sequences database of the skin flaps in breast reconstruction and burns

Moderhak Mateusz, Kaczmarek Mariusz

Measurement Automation Monitoring

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2019

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Vol. 65, No. 1

26--29

EN

This paper presents a database of Active Dynamic Thermography (ADT) thermal sequences gathered throughout 6 year study on ADT application in skin flap blood perfusion monitoring and burn wounds diagnosis. For skin flap monitoring the database comprises of data collected during three different breast reconstruction procedures. The patients were monitored pre, intra and post surgically within 90 days period. The sequences were used in skin flap parametric imaging aimed at reducing complications and improving flap perfusion. For burns investigation patients were monitored following an accident, at the 3-rd day and 21 days after.

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Thermal modelling and screening method for skin pathologies using active thermography

Strąkowska M., Strąkowski R., Strzelecki M., De Mey G., Więcek B.

Biocybernetics and Biomedical Engineering

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2018

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Vol. 38, no. 3

602--610

EN

This paper presents a novel screening approach of human skin pathologies using Active IR Thermography. The inputs of the proposed algorithm are the values of the physical parameters of the skin. Parameters are estimated based on dynamic thermographic measurements of human skin and the developed thermal model of the tissue. The calculations were based on the inverse thermal modelling. Classification was done using Support Vector Machine, Linear Discriminant Analysis and k-Nearest Neighbours classifiers. As an example, one presented the results of screening for psoriasis.

4

Infrared thermography as a new method for quality control of sheet metal parts in the press shop

An Q., Hortig D., Merklein M.

Archives of Civil and Mechanical Engineering

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2012

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Vol. 12, no. 2

148--155

EN

Active dynamic thermography was proved to be a new alternative for crack detection. To achieve zero failure sheet metal production in the press shop, this method was investigated for different steel components, which were directly collected from series production. And the cracks in the presented specimens differ in length and in depth, and a series study on these surface cracks is executed. The crack detection capabilities of active thermography with two different excitation sources were compared: optical and inductive excited thermography. Results of experiments obtained by these two techniques are showed and compared with each other. Opportunities of applying these methods in press shop are discussed.

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Dopasowanie obrazów podczerwieni przy pomocy sekwencji obrazów widzialnych

Suchowirski M., Nowakowski A.

Pomiary Automatyka Kontrola

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2009

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R. 55, nr 11

927-930

PL

W pracy przedstawiono algorytm stabilizacji obrazów badanego obiektu poprzez transformacje sekwencji obrazów zarejestrowanych w świetle widzialnym. Zaprezentowano koncepcję, w jaki sposób wykorzystać uzyskane dane transformacji do korekty i stabilizacji rejestrowanych synchronicznie sekwencji obrazów podczerwieni, w celu poprawy dokładności i efektywności metody aktywnej termografii dynamicznej (ADT). Procedura ta jest szczególnie istotna w badaniach termograficznych przy obserwacji bijącego serca w trakcie interwencji kardiochirurgicznych, ale generalnie pozwala na wyraźną poprawę jakości danych ADT w diagnostyce medycznej.

EN

Algorithm of tested object visual image stabilization via transformation of image sequences is shown with the aim of image matching. A concept how to use the transformation data for correction and matching of IR-thermal images in active dynamic thermography (ADT) is presented. The procedure improves significantly accuracy and efficiency of ADT measurements. The method is especially important for observation of the beating heart during cardiosurgery interventions, but is of general use in ADT medical diagnostics.