Non-contact imaging of venous compliance in humans using an RGB camera

Visualization of Venous Compliance of Superficial Veins Using Non-Contact Plethysmography Based on Digital Red-Green-Blue Images

“…Figure 4 shows the proposed VC imaging process [17]. The spatial distribution of VC could not be observed because no visualization of VC was presented.…”

“…To address these problems, we propose a non-contact plethysmography (NCPG) system that uses a red-green-blue (RGB) camera to measure VC [17]. We consider that there are two important differences between NCPG and SPG that may affect the resulting VC measurements.…”

Cardiovascular assessment by imaging photoplethysmography – a review

“…Nishidate et al [156] also assessed the vasomotor activity, but they used the total blood concentration by combining oxygenated and deoxygenated blood concentrations. Similarly, Nakano et al [159] used this technique to estimate venous compliance. Moço et al [160] recently proposed to derive signals from the neck in order to determine arterial stiffness and other vascular parameters by waveform analysis.…”

“…Basic research Signal origin, impact factors and contained information 17 [19-24, 27, 28, 31, 61, 65, 66, 76, 161, 169, 178-181] (Mean) HR HR extraction or signal improvements relevant for HR extraction 83 [6, 29, 34-36, 39, 40, 42-45, 47, 51-53, 55, 59, 64, 67, 68, 70, 75, 79, 82, 83, 85, 86, 88, 89, 98, 100, 103, 104, 109, 110, 115-119, 122-134, 139, 141, 144, 176, 182-208] HRV HRV parameter extraction or beat-to-beat HR extraction 20 [32,33,37,41,56,72,84,93,97,99,114,137,138,140,143,146,147,149,209,210] Oximetry Oxygen saturation/tissue metabolism (typically pulse oximetry) 11 [18,30,69,78,96,105,154,155,[211][212][213] Vasculature Effects related to vasculature (most often morphology behavior) 9 [63,73,77,113,156,157,159,160,214] PTT PTT extraction and usage 9 [74, 101, 162, 164-167, 209, 215] 2d Two-dimensional analyses 6 …”