Fig. 2
From: Thermography as a non-ionizing quantitative tool for diagnosing periapical inflammatory lesions
a Thermal image for AAP related to the upper left first molar. The heat detector is pointing to the highest temperature (36.7 °C). b Periapical radiograph showing widening of the lamina dura around the mesial root of the same tooth. c Thermal image for AA related to the upper left first molar with the highest temperature (37.8 °C) detected using Flir Tools software. d Periapical radiograph showing widening of the lamina dura around the roots of the same tooth with radiolucency related to the apex of the roots. e Thermal image for CA related to the upper right second premolar. f Periapical radiograph showing radiolucency surrounding the apex of the upper right second premolar. A sinus tract related to the same tooth was detected on clinical examination