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Use of infrared thermography in detection of subclinical mastitis in dairy cows
Date Issued |
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2017-09-28 |
ISBN 978-609-473-057-3.
Leidinys išleistas Lietuvos sveikatos mokslų universiteto Veterinarijos akademijos ir Lietuvos Respublikos žemės ūkio ministerijos (projekto sutartis 2017-05-05 Nr. ŠR-17-12/PRM17-39) lėšomis.
The use of infrared thermography has proved to be an interesting and non-invasive tool in veterinary reserach. The aim of this study was to investigate the capability thermography and to evaluate it's application in diagnostics of subclinical mastitis in dairy cows. Materials and methods. Thermal images of 624 teats were taken before the milking using an infrared thermographic camera (Flir Systems E4), positioned 1 m from the lateral side of the udder. Assessment of the teats was carried out at an angle of 90°. All the cows (n=156) before thermal test had more than 10 minutes at a time to acclimatize to the environment temperature. The temperature was measured at the teat sinus. After, in a colorimetric thermal mapping program, the elements (pixels) were interpreted resulting in the surface temperatures (°C). The reading of pixels consists in a complex set of algorithms, designated by colors that exactly match the value of a temperature specified in the coordinates. Emission coefficient 0.98 was used as the most consistent with the parameters of measured object. Thermographic images were analyzed using the software Flir Tool version 2.1. The temperature were rated on four points (point 1 -left front teat of the udder, point 2 - right front teat, point 3 - left tear teat, point 4 - right rear teat), at the sinuse. [...].