Liquid-based detectors are widely used in particle and nuclear physics experiments.Because fixed method is used to construct the geometry in detector simulations such as Geant4,it is usually difficult to describe the ...Liquid-based detectors are widely used in particle and nuclear physics experiments.Because fixed method is used to construct the geometry in detector simulations such as Geant4,it is usually difficult to describe the non-uniformity of the liquid in a detector.We propose a method based on geometry description markup language and a tessellated detector description to share the detector geometry information between computational fluid dynamics simulation software and detector simulation software.This method makes it possible to study the impact of a liquid flow and non-uniformity on the key performance of a liquid-based detector,such as the event vertex reconstruction resolution.This will also be helpful in the detector design and performance optimization.展开更多
Objeotive To examine and follow up cervical cytology of pregnant and postpartum women and study their cytopathologie characteristics, so as to determine screening and managing programs for abnormal cervical cytology. ...Objeotive To examine and follow up cervical cytology of pregnant and postpartum women and study their cytopathologie characteristics, so as to determine screening and managing programs for abnormal cervical cytology. Mothods Totally 5296 patients in pregnancy and postpartum, in which 3729 by computer-assisted cytology test and 1567 by liquid-based monolayers cytology test, were examined and diagnosed by the Bethesda System made in 2001. Those proven epithelial abnormalities patients were followed up until the lesions regressed to normal. The remaining patients, who exhibited persistent abnormalities or progression, were given further examinations. Results The positive rate of cervical cytological test was 8.72% （462/5296）, including squamous carcinoma （SCA） 1 case （ 0.02% ）, high grade squamous intraepithelial lesion （HSIL） 34 cases （ 0.64% ）, low grade squamous intraepithelial lesion （LSIL） 145 cases （ 2.74% ）, atypical glandular cells （AGC） 5 cases （ 0.09% ）, atypical squamous cells cannot exclude HSIL （ASC-H） 14 cases （0.26%）, atypical squamous cells of undetermined significance （ASC-US） 263 cases （4.97%）. The 419 proven cytological abnormality cases were followed up successfully. The total transnegative rate in three months was 73.74% （309/419）, in which 303 cases （72.32%） persisted normal status for more than six months after regression. And the transnegative rate of ASC-US, ASC-H, AGC, LSIL, and HSIL were 79.56%, 64.29%, 100%, 72.14% and 44.12%, respectively. Forty-six cases received biopsy directed by colposcopy. The distribution of coincidence of cytopathologic and histopathologic diagnosis was： SCA 1 case （100%）, HSIL 10 cases （76.92%）, LSIL 13 cases （65%）, ASC-H 2 cases （50%）, ASC-US 3 cases （37.50%）, total 29 cases （63.04%）. Conclusions We should cast more attention to screening cervix lesions in pregnant and postpartum women. Their cytopathologic characteristics are liable to make the clinician give a false positive diagnosis. So we propose to follow up them closely and to lower the indication of biopsy.展开更多
Preoperative cytologic brushing and biopsy under direct Vision withfiberoptic colonoscopy(FC)and postoperative histopathologic examination wereperformed in 147 patients who were suspected of suffering from carcinoma o...Preoperative cytologic brushing and biopsy under direct Vision withfiberoptic colonoscopy(FC)and postoperative histopathologic examination wereperformed in 147 patients who were suspected of suffering from carcinoma of co-lon.In FC cytologic brushing,128 cases were positive for malignancy(87.1percent),18 false-negative(12.2 percent)and only one false-positive(0.7 percent).In the 146 FC biopsy specimens,124 were positive for malignancy(84 4 percent)and 22 false-negative and no false-positive.Combination of FC cytologic brushingwith FC biopsy could raise the diagnostic rate of colonic carcinoma to 95.2% anddecrease false-negative and false-positive because the two methods may replenisheach other in sampling and observation.Cytologic brushing is most valuable tothe early diagnosis of colonic carcinoma.When colonic stricture and obstructionprevent the colonoscope from reaching the lesion and FC biopsy cannot bedone,FC cytologic brushing is an effective method for diagnosis.The positiverate and false-negative rate of the cytologic brushing did not correlate to grosstyping,histopathologic typing and Dukes staging(P】0.05).The factorsinfluencing the correct diagnosis of colonic carcinoma by FC cytologic brushingare discussed in this paper.展开更多
For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which be...For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which belong to different climate ecotype （early, medium and late） of indica and japonica were onboard ＂Shenzhou 4＂ spaceship for 162 h. After recovered the total number of mitosis cells and chromosomal aberration were observed. In all the lines the mitotic index （MIs） of space flight are much higher than control, which indicates the stimulate effect of space environment. The cell rate of chromosomal aberration （CRCA） of space flight is also much higher than control, but varies from line to line. It indicates that biological effect of space environment on rice seed dependents not only on flight duration but also on rice genotype. The radiosensitivities of different lines were also discussed according to CRCAs.展开更多
目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞...目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞学标本,采用华为云ModelArts平台开发的人工智能(artifical intelligence,AI)辅助诊断系统与初级、中级、高级医师进行诊断比对,计算灵敏度、特异度、精确率、符合率、曲线下面积(area under the curve,AUC)等指标,评估AI系统的诊断效能及其对不同年资医师的辅助诊断效果。采用McNemar检验比较AI系统与人工诊断的差异。结果在1044例宫颈脱落细胞学标本中,AI系统在非典型细胞检出的灵敏度和特异度分别为98.96%和89.15%,均高于初级医师(81.95%和91.81%)。AI系统的总体诊断精确率为93.68%,显著高于初级医师(87.26%,P<0.001)。AI辅助可显著提高初级医师的诊断性能,灵敏度从80.1%提升至96.5%,特异度从85.6%提升至92.3%。结论本研究构建的AI辅助宫颈细胞学诊断系统性能优越,尤其能显著提高初级医师的诊断水平,具有良好的临床应用前景。展开更多
基金the National Natural Science Foundation of China(Nos.11675275,11975021 and U1932101)the Strategic Priority Research Program of Chinese Academy of Sciences(XDA10010900).
文摘Liquid-based detectors are widely used in particle and nuclear physics experiments.Because fixed method is used to construct the geometry in detector simulations such as Geant4,it is usually difficult to describe the non-uniformity of the liquid in a detector.We propose a method based on geometry description markup language and a tessellated detector description to share the detector geometry information between computational fluid dynamics simulation software and detector simulation software.This method makes it possible to study the impact of a liquid flow and non-uniformity on the key performance of a liquid-based detector,such as the event vertex reconstruction resolution.This will also be helpful in the detector design and performance optimization.
文摘Objeotive To examine and follow up cervical cytology of pregnant and postpartum women and study their cytopathologie characteristics, so as to determine screening and managing programs for abnormal cervical cytology. Mothods Totally 5296 patients in pregnancy and postpartum, in which 3729 by computer-assisted cytology test and 1567 by liquid-based monolayers cytology test, were examined and diagnosed by the Bethesda System made in 2001. Those proven epithelial abnormalities patients were followed up until the lesions regressed to normal. The remaining patients, who exhibited persistent abnormalities or progression, were given further examinations. Results The positive rate of cervical cytological test was 8.72% （462/5296）, including squamous carcinoma （SCA） 1 case （ 0.02% ）, high grade squamous intraepithelial lesion （HSIL） 34 cases （ 0.64% ）, low grade squamous intraepithelial lesion （LSIL） 145 cases （ 2.74% ）, atypical glandular cells （AGC） 5 cases （ 0.09% ）, atypical squamous cells cannot exclude HSIL （ASC-H） 14 cases （0.26%）, atypical squamous cells of undetermined significance （ASC-US） 263 cases （4.97%）. The 419 proven cytological abnormality cases were followed up successfully. The total transnegative rate in three months was 73.74% （309/419）, in which 303 cases （72.32%） persisted normal status for more than six months after regression. And the transnegative rate of ASC-US, ASC-H, AGC, LSIL, and HSIL were 79.56%, 64.29%, 100%, 72.14% and 44.12%, respectively. Forty-six cases received biopsy directed by colposcopy. The distribution of coincidence of cytopathologic and histopathologic diagnosis was： SCA 1 case （100%）, HSIL 10 cases （76.92%）, LSIL 13 cases （65%）, ASC-H 2 cases （50%）, ASC-US 3 cases （37.50%）, total 29 cases （63.04%）. Conclusions We should cast more attention to screening cervix lesions in pregnant and postpartum women. Their cytopathologic characteristics are liable to make the clinician give a false positive diagnosis. So we propose to follow up them closely and to lower the indication of biopsy.
文摘Preoperative cytologic brushing and biopsy under direct Vision withfiberoptic colonoscopy(FC)and postoperative histopathologic examination wereperformed in 147 patients who were suspected of suffering from carcinoma of co-lon.In FC cytologic brushing,128 cases were positive for malignancy(87.1percent),18 false-negative(12.2 percent)and only one false-positive(0.7 percent).In the 146 FC biopsy specimens,124 were positive for malignancy(84 4 percent)and 22 false-negative and no false-positive.Combination of FC cytologic brushingwith FC biopsy could raise the diagnostic rate of colonic carcinoma to 95.2% anddecrease false-negative and false-positive because the two methods may replenisheach other in sampling and observation.Cytologic brushing is most valuable tothe early diagnosis of colonic carcinoma.When colonic stricture and obstructionprevent the colonoscope from reaching the lesion and FC biopsy cannot bedone,FC cytologic brushing is an effective method for diagnosis.The positiverate and false-negative rate of the cytologic brushing did not correlate to grosstyping,histopathologic typing and Dukes staging(P】0.05).The factorsinfluencing the correct diagnosis of colonic carcinoma by FC cytologic brushingare discussed in this paper.
基金Sponsored by the National"863"Program Project (2004AA231071) the Ministerial Level Foundation
文摘For exploring the biological effect of space environment on different genotype of rice seeds, the cytological effects of M1 generation after space flight were studied. Twelve different genotypes of rice seeds which belong to different climate ecotype （early, medium and late） of indica and japonica were onboard ＂Shenzhou 4＂ spaceship for 162 h. After recovered the total number of mitosis cells and chromosomal aberration were observed. In all the lines the mitotic index （MIs） of space flight are much higher than control, which indicates the stimulate effect of space environment. The cell rate of chromosomal aberration （CRCA） of space flight is also much higher than control, but varies from line to line. It indicates that biological effect of space environment on rice seed dependents not only on flight duration but also on rice genotype. The radiosensitivities of different lines were also discussed according to CRCAs.
文摘目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞学标本,采用华为云ModelArts平台开发的人工智能(artifical intelligence,AI)辅助诊断系统与初级、中级、高级医师进行诊断比对,计算灵敏度、特异度、精确率、符合率、曲线下面积(area under the curve,AUC)等指标,评估AI系统的诊断效能及其对不同年资医师的辅助诊断效果。采用McNemar检验比较AI系统与人工诊断的差异。结果在1044例宫颈脱落细胞学标本中,AI系统在非典型细胞检出的灵敏度和特异度分别为98.96%和89.15%,均高于初级医师(81.95%和91.81%)。AI系统的总体诊断精确率为93.68%,显著高于初级医师(87.26%,P<0.001)。AI辅助可显著提高初级医师的诊断性能,灵敏度从80.1%提升至96.5%,特异度从85.6%提升至92.3%。结论本研究构建的AI辅助宫颈细胞学诊断系统性能优越,尤其能显著提高初级医师的诊断水平,具有良好的临床应用前景。
