IR-thermal monitoring of cardiosurgery interventions

A method to produce high contrast vein visualization in active dynamic thermography (ADT)

“…At last, the duration of external cooling stimulation was fixed at 30s in this study. In medical ADT applications, external stimulation can be applied for a time duration varying from 5s to 60s [20]. With the change in the duration of cooling, the effect on the quality of Dynamic SI will be a subject of future work in this field.…”

Single image reconstruction in active dynamic thermography: A novel approach

“…To statistically analyze the results, in each subject, 3 repetitions are performed. For medical ADT, external heating/cooling excitation can be applied for a time duration varying from 5s to 60s [12]. In the present study, the cooling is applied for 30s and the thermal images (rows x columns: 240 x 320 pixels as shown around the vertical and horizontal axis of the images in the following sections) are captured (at a rate of 2 frames per second) for another 90s, using VarioCAM IR thermal camera by InfraTec (Fig.…”

“…Artificially inducing the ischemia by clamping the left descending artery (LAD) of a pig, compared to normal heart functioning, a higher Tau value over the left ventricle is observed. Such a diagnostic tool is well suited for determination of vascularization, necrosis and other pathological conditions [12]. Taking the reciprocal of Tau parameter in the same exponential equation, Jankovic et al [13] evaluated the rewarming rate (𝑘) at each pixel, which produces 𝑘 map of the ADT sequence.…”

Carotid artery stenosis (CAS) disease detection by passive and active medical infrared (IR) thermal imaging

“…This method is applied to monitor the cardiosurgery [245][246][247], evaluation of burn wound healing [248][249][250], vascular disease diagnosis [251], etc. Recently, Moderhak et al [252] described a dynamic thermography method, wherein 60 seconds of thermal excitation and 180 seconds of recovery time is used, to quantitively determine the success of breast reconstruction procedure by skin flap perfusion assessment.…”

“…In this study, the cold air flow was set to 1000 lit/min. This device was earlier used in other ADT related research studies on monitoring cardiosurgery interventions, reported in the work of Kaczmarek et al[245] and Nowakowski et al[246]. Thermal images were captured for the whole duration (250s) of the experiment using a FLIR E8 IR thermal camera.…”