Dispersion and exaggeration : Infrared Thermograph before and after carotid stenting(International Forum on Medical Imaging in Asia 2009 (IFMIA 2009))

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Carotid artery stenosis (CAS) is a major risk factor of ischemic stroke, and carotid stenting, which could restore cerebral flow, is one of its treatments of choice. Iwatani and Pavlidis et al proposed the blood heat flow estimation analysis, which could be applied successfully with thermograph to approximate the facial blood flow. Therefore, we conduct a study to compare the infrared thermographic parameters of those patients having carotid stenting. We enrolled 6 patients undergoing carotid stenting. Of them, 3 had bilateral stenting. Patency quantification was performed with the on-line software (Simens Quancor) before and after the stenting. The maximal patency rate (100%- smallest lumen diameter/normal reference diameter%) of common carotid artery (CCA), adjacent internal carotid artery (ICA), and external carotid artery (ECA)) had been measured. Facial thermograph was conducted in constant room temperature was kept (20〜25 degree Celsius). For all the pixels obtained, mean (Pmean), and standard deviation (Psd) of them were calculated. All the selected ICA lesions were stented successfully (patency rate changing from (36.89+/-29.89%) to (81.11+/16.91)%). There was no significant change of the ECA or CCA patency. Pmean increased from 31.99 degree to 32.81 degree Celsius without statistical significance (p=0.162), but Psd dispersion exaggerated apparently (from 2.6+/-0.41 to 3.2+/-0.66℃, p=0.003). We conclude temperature dispersion of facial infrared thermograph of CAS patients was exaggerated after stenting. Such a method could be developed further for follow-up of those patients.
社団法人電子情報通信学会の論文
2009-01-12

Dispersion and exaggeration : Infrared Thermograph before and after carotid stenting(International Forum on Medical Imaging in Asia 2009 (IFMIA 2009))

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