Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Aug 2008
[Lossless compression of high sampling rate ECG data based on BW algorithm].
Now researches of ECG data compression mainly focus on compressing the ECG data of low sampling rate. A BW-based high sampling rate ECG data lossless compression algorithm is proposed in this paper. We apply difference operation to the original ECG data first and take part of the 16-bit binary differential value as 8-bit binary. ⋯ Our experimental results indicate that this is an efficient lossless compression method suitable for body surface ECG data as well as for heart ECG data. The average compression ratios come up to 3.547 and 3.608, respectively. By comparison with current ECG compression algorithms, our algorithm has gained much improvement in terms of the compression ratio, especially when applied to the high sampling rate ECG data.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Jun 2008
[Development and validation of head finite element model for traffic injury analysis].
A finite element (FE) model of human body head (HBM-head) was developed in accordance with human head anatomy. The model consists of scalp, skull, dura mater, cerebro-spinal fluid (CSF), pia mater, cerebrum, cerebellum, ventricle, brain stem, falx, tentorium, etc. ⋯ The kinematic and kinetic responses as well as the intracranial pressure distribution of the head model were compared with experimental data. It is proved that the head FE model has good biofidelity and can be used to study head-brain injuries and injury mechanisms in vehicle traffic accidents.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Apr 2008
[Application of integer lifting wavelet transform and subblock coding to medical image compression].
The method of subblock coding for medical image compression is presented by means of the integer lifting wavelet transform. The integer lifting wavelet transform has better effects on improving the processing speed; it can achieve wavelet transform for arbitrary size image and accomplish the transform at current position; furthermore, it can save memory space. The lifting algorithm can deal with the lossless compression and loss compression of image simultaneously, so it is adapted to telemedicine system and medical image compression system. The compression method based on image subblock coding can not only realize controlling BR (bit ratio), but also realize SNR (signal noise ratio) and suit for progressive transform.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Apr 2008
[Detecting sleep apnea/hypopnea events with a wearable respiratory inductive plethysmograph system].
The wearable respiratory inductive plethysmograph(RIP) system is a non-intrusive respiratory monitoring system. Sleep monitoring was performed on 9 human subjects suspected of having sleep apnea hypersomnolence syndrome (SAHS) and 7 healthy volunteers using both the wearable RIP system and the conventional polysomnography(PSG), and the sensitivity and specificity of the wearable RIP system were analyzed by comparison with the PSG results. ⋯ The wearable RIP system can be used reliably in detecting sleep apnea/hypopnea events. This system can be used at home for detecting the sleep apnea/hypopnea events non-intrusively.
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Sheng Wu Yi Xue Gong Cheng Xue Za Zhi · Feb 2008
Comparative Study[Comparison between automatic and handwritten anesthetic records: influence of total duration of anesthesia].
The records of 58 children's general anesthesia children (ASA I) were investigated. The handwritten records and the automatic anesthetic records were applied simultaneously to collect data from each patient. The total duration of anesthesia (T), the time for handwritten record (H), and the time for automatic record (A) were recorded by 3 timers respectively. ⋯ Furthermore, in group I, automatic record kept more vital sign notes (P < 0.001), but had no more event notes (P = 0.407); In group II, automatic record kept more event notes (P = 0.015), but had no more vital signs notes (P = 0.374). In general, automatic anesthetic record is suitable for all kinds of duration of anesthesia. When the time extends, it can provide a better platform for the anesthesiologist to improve the quality of management.