Review of Biomedical Applications of Contactless Imaging of Neonates Using Infrared Thermography and Beyond

AlZubaidi, Abbas K.; Ethawi, Yahya; Schmölzer, Georg M.; Sherif, Sherif M.; Narvey, Michael; Seshia, Molly

doi:10.3390/mps1040039

Cited by 15 publications

(8 citation statements)

References 73 publications

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“…All these data indicate that IRI, including endothelial cell damage and extravascular fluid leakage, occurred in nonsuitable cases at the earliest timing of EVLP, and subsequently, this poor perfusion resulted in significantly lower lung surface temperatures. This is consistent with the common mechanism of thermography as noted in previous reports: poor circulation leads to lower thermography temperatures 10–14 …”

Section: Discussionsupporting

confidence: 92%

“…9 Infrared thermography is a real-time and noninvasive technique to monitor the surface temperature of a body or an organ. This technique has been applied in several medical areas [10][11][12] and is typically utilized to detect poor peripheral circulation in the skin. 13,14 In clinical kidney transplantation, the graft surface temperature at the initial 3-8 min of reperfusion discriminates between poorly functioning kidneys.…”

Section: Introductionmentioning

confidence: 99%

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Lung thermography during the initial reperfusion period to assess pulmonary function in cellular ex vivo lung perfusion

et al. 2022

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Background: Thermography is a noninvasive technology to detect low temperatures in poorly circulated areas. In ex vivo lung perfusion (EVLP), lungs are rewarmed to body temperature during the initial 1 h. Currently, the effect of graft thermal changes during the rewarming phase on pulmonary function is unknown. In this study, we evaluated the correlation of lung surface temperature with physiological parameters, wet/dry ratio, and transplant suitability in Lundtype EVLP.Methods: Fifteen pigs were divided into three groups: control group (no warm ischemia) or donation after circulatory death groups with 60 or 90 min of warm ischemia (n = 5, each). Thermal images of the lower lobes were continuously collected from the bottom of an organ chamber using infrared thermography throughout EVLP.Results: At 8 min, lung surface temperatures of nonsuitable cases were significantly lower than in suitable cases (25.1 ± 0.6 vs. 27.8 ± 1.2°C, p < 0.001), while there was no difference in lung surface temperatures between the two groups at 0-4 min and 12-120 min. There was a significant negative correlation between lung surface temperatures at 8 min and wet/dry ratio at 2 h in the lower lobes

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Lung thermography during the initial reperfusion period to assess pulmonary function in cellular ex vivo lung perfusion

et al. 2022

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“…38 To ensure measurement accuracy and to reduce sensor-to-sensor variation, thermal imaging devices require calibration against temperature-controlled reference sources or industrial black body systems. 39,40…”

Section: Introductionmentioning

confidence: 99%

Non-contact physiological monitoring of preterm infants in the Neonatal Intensive Care Unit

et al. 2019

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The implementation of video-based non-contact technologies to monitor the vital signs of preterm infants in the hospital presents several challenges, such as the detection of the presence or the absence of a patient in the video frame, robustness to changes in lighting conditions, automated identification of suitable time periods and regions of interest from which vital signs can be estimated. We carried out a clinical study to evaluate the accuracy and the proportion of time that heart rate and respiratory rate can be estimated from preterm infants using only a video camera in a clinical environment, without interfering with regular patient care. A total of 426.6 h of video and reference vital signs were recorded for 90 sessions from 30 preterm infants in the Neonatal Intensive Care Unit (NICU) of the John Radcliffe Hospital in Oxford. Each preterm infant was recorded under regular ambient light during daytime for up to four consecutive days. We developed multi-task deep learning algorithms to automatically segment skin areas and to estimate vital signs only when the infant was present in the field of view of the video camera and no clinical interventions were undertaken. We propose signal quality assessment algorithms for both heart rate and respiratory rate to discriminate between clinically acceptable and noisy signals. The mean absolute error between the reference and camera-derived heart rates was 2.3 beats/min for over 76% of the time for which the reference and camera data were valid. The mean absolute error between the reference and camera-derived respiratory rate was 3.5 breaths/min for over 82% of the time. Accurate estimates of heart rate and respiratory rate could be derived for at least 90% of the time, if gaps of up to 30 seconds with no estimates were allowed.

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“…Neonatal state classification is characterized by PSG 15 and Brazelton’s descriptive definition 9 . However, PSG is not commonly used in neonatal medicine as it is highly invasive, with many electrodes attached to the body.…”

Section: Discussionmentioning

confidence: 99%

Video‐based neonatal state assessment method for timing of procedures

Okamoto

Imai

et al. 2021

Pediatrics International

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Background Procedures should be performed when an infant is most receptive to disruptions in order to reduce the stress on the infant. However, frequent direct observations place a heavy burden on medical staff. There is therefore a need for a method for quantitatively and automatically evaluating the neonatal state. Methods Ten infants in our hospital were enrolled in this study. The states of the infants were assessed by medical staff using the Brazelton Neonatal Behavioral Assessment Scale and were recorded on video at the same time. The recorded states were reclassified as activity levels, a new state classification method that includes middle activity, which is the appropriate time for a procedure. Using image analysis, motions of the infant were quantified as two indices: activity and pause time. Activity and pause time were compared for each activity level. The cutoff values of the indices were calculated, and the sensitivity and specificity of the middle activity were calculated. Results There was a significant difference between all groups of activity level (P < 0.01). The maximum sensitivity and specificity of middle activity were 71.7% and 51.2%, respectively. Conclusions The neonatal state of infants can be quantitatively and automatically evaluated using video cameras, and the activity level can be used to determine an appropriate time for procedures in infants. This will reduce the burden on medical staff and lead to less stressful procedures for infants.

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Review of Biomedical Applications of Contactless Imaging of Neonates Using Infrared Thermography and Beyond

Cited by 15 publications

References 73 publications

Lung thermography during the initial reperfusion period to assess pulmonary function in cellular ex vivo lung perfusion

Lung thermography during the initial reperfusion period to assess pulmonary function in cellular ex vivo lung perfusion

Non-contact physiological monitoring of preterm infants in the Neonatal Intensive Care Unit

Video‐based neonatal state assessment method for timing of procedures

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