目的:为轻便型视屏神经外科配备便携式显微镜/远视镜实时观察和记录系统。方法:系统由显像设备、成像设备和支架组成。显像设备为Dell便携式计算机;成像设备包括DFK-21AU04 USB CCD摄像头、Computar MLH-10×macro镜头和COPL-40-W...目的:为轻便型视屏神经外科配备便携式显微镜/远视镜实时观察和记录系统。方法:系统由显像设备、成像设备和支架组成。显像设备为Dell便携式计算机;成像设备包括DFK-21AU04 USB CCD摄像头、Computar MLH-10×macro镜头和COPL-40-W同轴光灯头复合体;支架为改造的MA241102便携式气动弹簧摇臂式支架。通过视屏观察(15 cm)深瓶中的干豆、切开的新鲜石榴及成年SD大鼠活体颈总动脉分叉部;在视屏图像引导下阻断成年SD大鼠大脑中动脉。结果:Qy/Fx-0810-Mi/Ma便携式实时观察和记录系统小巧轻便、廉价实用,能够从不同角度观察手术野,工作距离超过54 cm,视屏图像清晰、逼真、有立体感且与实际操作同步。结论:可低成本组建适合轻便型视屏神经外科的便携式显微镜/远视镜实时观察和记录系统。展开更多
AIM:To validate the sleep-disordered breathing components of a portable electrocardiography and hemodynamic monitor to be used for sleep apnea screening.METHODS:Sleep-disordered breathing(SDB) is associated with card... AIM:To validate the sleep-disordered breathing components of a portable electrocardiography and hemodynamic monitor to be used for sleep apnea screening.METHODS:Sleep-disordered breathing(SDB) is associated with cardiovascular disease.Patients with existing cardiovascular disease may have unrecognized SDB or may develop SDB while under the care of a cardiologist.A screening device for SDB,easy to use and appealing to cardiologists,would assist in referral of appropriate patients for full polysomnography(PSG).A cardiac and respiratory monitor(CPAM) was attached to patients undergoing PSG and an apnea/hypopnea index(AHI) generated.The CPAM device produced respiration rate,snoring rate,individual apnea/hypopnea events and an SDB severity score(SDBSS).In addition to AHI,an expert over-reader annotated individual breaths,snores and SDB breathing events to which the automated algorithms were compared.RESULTS:The test set consisted of data from 85 patients(age:50.5 ± 12.4 years).Of these,57 had a positive PSG defined as AHI ≥ 5.0(mean:30.0 ± 29.8,negative group mean:1.5 ± 1.2).The sensitivity and specificity of the SDBSS compared to AHI was 57.9% and 89.3%,respectively.The correlation of snoring rate by CPAM compared to the expert overreader was r = 0.58(mean error:1.52 snores/min),while the automated respiration rate had a correlation of r = 0.90(mean error:0.70 breaths/min).CONCLUSION:This performance assessment shows that CPAM can be a useful portable monitor for screening and follow-up of subjects for SDB.展开更多
针对现有两波段光谱仪在实际应用中存在的植被指数单一、生长指标反演精度低等问题,该研究研发了一款便携式三波段作物生长监测仪CGMD303(Crop-Growth Monitoring and Diagnosis,CGMD)并于2018年7-9月开展了水稻田间试验研究。结果表明,...针对现有两波段光谱仪在实际应用中存在的植被指数单一、生长指标反演精度低等问题,该研究研发了一款便携式三波段作物生长监测仪CGMD303(Crop-Growth Monitoring and Diagnosis,CGMD)并于2018年7-9月开展了水稻田间试验研究。结果表明,CGMD303获取的植被指数与商用仪器ASD FieldSpec HandHeld2呈良好的线性相关关系,同时基于CGMD303构建的水稻生长监测模型可以有效预测叶面积指数、叶片干质量、叶片氮质量分数和叶片氮积累量,决定系数分别为0.85、0.72、0.45和0.68,相对均方根误差分别为0.21、0.32、0.13和0.39。CGMD303可以有效获取冠层光谱反射率,构建的水稻指标监测模型可以精确预测叶面积指数、生物量和氮素指标,可为水稻田间栽培工作提供决策依据。展开更多
基金Supported by An equipment grant from Inovise Medical,Inc.,Beaverton OR,United States,for clinical data collection
文摘 AIM:To validate the sleep-disordered breathing components of a portable electrocardiography and hemodynamic monitor to be used for sleep apnea screening.METHODS:Sleep-disordered breathing(SDB) is associated with cardiovascular disease.Patients with existing cardiovascular disease may have unrecognized SDB or may develop SDB while under the care of a cardiologist.A screening device for SDB,easy to use and appealing to cardiologists,would assist in referral of appropriate patients for full polysomnography(PSG).A cardiac and respiratory monitor(CPAM) was attached to patients undergoing PSG and an apnea/hypopnea index(AHI) generated.The CPAM device produced respiration rate,snoring rate,individual apnea/hypopnea events and an SDB severity score(SDBSS).In addition to AHI,an expert over-reader annotated individual breaths,snores and SDB breathing events to which the automated algorithms were compared.RESULTS:The test set consisted of data from 85 patients(age:50.5 ± 12.4 years).Of these,57 had a positive PSG defined as AHI ≥ 5.0(mean:30.0 ± 29.8,negative group mean:1.5 ± 1.2).The sensitivity and specificity of the SDBSS compared to AHI was 57.9% and 89.3%,respectively.The correlation of snoring rate by CPAM compared to the expert overreader was r = 0.58(mean error:1.52 snores/min),while the automated respiration rate had a correlation of r = 0.90(mean error:0.70 breaths/min).CONCLUSION:This performance assessment shows that CPAM can be a useful portable monitor for screening and follow-up of subjects for SDB.
