Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Comparative StudyK-space and image space combination for motion artifact correction in multicoil multishot diffusion weighted imaging.
Motion during diffusion encodings leads to phase errors in different shots of a multishot acquisition. Phase differences in k-space data among shots result in phase cancellation artifacts in the reconstructed image. ⋯ We introduce a new k-space and image-space combination (KICT) method for motion artifacts cancellation that avoids incomplete phase error correction. Further, the method preserves the phase of the object, which is important for parallel imaging applications.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Comparative StudyPerformance evaluation of three methods for respiratory signal estimation from the electrocardiogram.
A comparative study of three methods for estimating respiratory signal through electrocardiogram (ECG) was carried out. The three methods analyzed were based on R wave area, R peak amplitude and heart rate variability (HRV). For each method, cross-correlation coefficient and spectral coherence in a range of frequencies up to 0.5 Hz were computed between the ECG derived respiratory signals (EDR) and the three real respiratory signals: oronasal, and two inductance plethysmographies recordings (chest and abdominal). Results indicate that EDR methods based on R wave area and HRV are better correlated and show a wider spectral coherence with real respiratory signals than the other EDR method based on R peak amplitude.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Interpolation of the subjective score of visually-induced motion sickness by using physiological parameters.
In order to investigate the effect of visually-induced motion sickness in actual video images, this study proposes a method of interpolation for the subjective score, which has low time and quantitative resolutions, by using physiological parameters. The model which represents the change in subjective score of VIMS was expressed as multiple regression equations in which input parameters are cardiovascular indices such as heart rate variability. The estimation results indicated that the model can represent, in higher resolution, the change in the subjective score of the subjects who have induced nausea.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Clinical TrialPersonalized neuromuscular blockade through control: clinical and technical evaluation.
This paper presents a statistical analysis of clinical data collected in surgeries under automatic closed-loop control of neuromuscular blockade. Four different control strategies have been applied in patients undergoing elective surgeries and clinical and technical evaluations of the control system were performed. Both transient and steady-state behaviour were analysed in detail and clearly suggest an automatic control approach relying on the information about the patient dynamics. The results can be a valuable start point to design personalized drug infusion control in anaesthesia.
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Conf Proc IEEE Eng Med Biol Soc · Jan 2008
Respiratory rate detection algorithms by photoplethysmography signal processing.
Photoplethysmography (PPG) offers the clinically meaningful parameters, such as, heart rate, and respiratory rate. In this study, we presented three respiratory signal detection algorithms using photoplethysmography raw data generated from commercial PPG sensor: (1)Min-Max (2)Peak-to-Peak (3)Pulse Shape. As reference signal, nasal sensor signal was acquired simultaneously and compared and analyzed. ⋯ They can be used to detect respiratory rate. But, Pulse Shape algorithm was accurate for subject 4 only. More experimental data is necessary to improve the accuracy and reliability.