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Ultrasound Scanning Competencies in Midwifery Education in Zambia: Findings from a Desk Review and Needs Assessment
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作者 Mutinke Zulu Sebean Mayimbo Patricia Katowa-Mukwato 《Health》 2024年第6期535-552,共18页
Introduction: Ultrasound is an essential component of antenatal care. Midwives provide most of the antenatal care but they do not perform ultrasound as it has been beyond their scope of practice. This leaves many wome... Introduction: Ultrasound is an essential component of antenatal care. Midwives provide most of the antenatal care but they do not perform ultrasound as it has been beyond their scope of practice. This leaves many women in Low and Middle-Income Countries without access to ultrasound scanning. The aim of this study was to identify competencies in ultrasound scanning in midwifery education. Methods: A desk review and needs assessment were conducted between July and October 2023. Articles and curricula on the internet, Google scholar and PubMed were searched for content on ultrasound scanning competencies. A Google form consisting of 20 questions was administered via email and WhatsApp to 135 participants. Descriptive statistics were used to analyse data. Results: The desk review showed that it is feasible to train midwives in ultrasound scanning. The training programs for midwives in obstetric ultrasound were conducted for 1 week to 3 months with most of them running for 4 weeks. Content included introduction to general principles of ultrasound, physics, basic knowledge in embryology, obstetrics, anatomy, measuring foetal biometry, estimating amniotic fluid and gestational age. Experts like sonographers trained midwives. Theory and hands on were the teaching methods used. Written and practical assessments were conducted. Needs assessment revealed that majority of participants 71 (53%) knew about basic ultrasound training for midwives. All participants (100%) said it is necessary to train midwives in basic ultrasound scan in Zambia. Some content should include, anatomy, measuring foetal biometry, assessing amniotic fluid level, and gestational age determination. Most participants 91 (67%) suggested that the appropriate duration of training is 4 - 6 weeks. Conclusion: Empowering every midwife with ultrasound scanning skills will enable early detection of any abnormality among pregnant women and prompt intervention to save lives. 展开更多
关键词 ultrasound scanning Midwifery Education Competencies
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Cubic spline interpolation based ultrasound scan conversion algorithm 被引量:1
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作者 MA Li-yong SUN Yu-de SHEN Yi 《通讯和计算机(中英文版)》 2008年第5期7-11,共5页
关键词 朝声扫描 转换算法 三次样条 内插技术
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Assessing gestational age of babies: Performance of obstetric ultrasound scan compared to that from the combination of Naegle’s rule and Dubowitz score in the 21st century
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作者 Baba Usman Ahmadu 《Natural Science》 2013年第8期32-35,共4页
Background: Some researchers have suggested that when Naegle’s rule (NR) and Dubowitz score (DS) are combined, it could out-perform obstetric ultrasound scan (USS). Others still believe that obstetric USS alone is st... Background: Some researchers have suggested that when Naegle’s rule (NR) and Dubowitz score (DS) are combined, it could out-perform obstetric ultrasound scan (USS). Others still believe that obstetric USS alone is still effective relative to the combination of NR rule and DS in assessing the gestational age (GA) of babies. Objectives: To determine and compare the GA of babies using obstetric USS, NR and DS;and to provide relevant public health information on obstetric USS in the 21st century. Methods: Subjects were selected using systematic random sampling and the GA of babies was determined using obstetric USS, NR, and DS. Statistical package for social science (SPSS) statistical software version 16, Illinois, Chicago USA was used for all data analysis. Results: Eightyfive mother-baby pairs were studied. Forty-four babies (52%) were males and 41 (48%) females. Sixty four (75%) were term with a mean (SD) BW of 3.02 (0.59) at 95%CI (2.89 -?3.14) kg. The overall mean GA of the babies was 38.49 (2.89) at 95%CI (38.14 -?38.85) weeks. The mean GA using obstetric USS, NR and DS were 38.52 (1.98) at 95%CI (38.14 -?38.99), 38.09 (4.13) at 95%CI (37.20-?38.99) and 38.82 (2.02) at 95%CI (38.39 -?39.26), but comparison of these means was not significant (p = 0.256). Combined mean GA by NR and DS was 38.46 (3.26) at 95%CI (37.96 -?38.95). Comparing this mean with mean GA obtained by obstetric USS was also not significant (p = 0.885). Conclusion: The GA assessments by Obstetric USS, NR and DS were all reliable, and Obstetric USS performed effectively relative to combined NR and DS. 展开更多
关键词 GESTATIONAL Age Babies OBSTETRIC ultrasound scan Naegle’s RULE Dubowitz SCORE Maiduguri NIGERIA
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Fazari’s Sign in Ultrasound Scan of Morbid Adherent Placenta/Placenta Accreta Spectrum (MAP/PAS) and Fazari’s Triad during (MAP/PAS) Surgery
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作者 Atif Bashir Eltayeb Fazari Zeinabsadat Tabatabaei Hakim 《Open Journal of Obstetrics and Gynecology》 2020年第4期599-603,共5页
Morbid Adherent Placenta (MAP)/Placenta Accreta Spectrum (PAS) is a serious diagnosis which has a risk of complications. Ultrasound scan helps in early diagnosis and has great value in further confirmation and follow ... Morbid Adherent Placenta (MAP)/Placenta Accreta Spectrum (PAS) is a serious diagnosis which has a risk of complications. Ultrasound scan helps in early diagnosis and has great value in further confirmation and follow up. Observed new clinical sign and associated clinical triad are discussed here. 展开更多
关键词 MORBID Adherent PLACENTA (MAP)/Placenta Accreta Spectrum (PAS) ultrasound scan Stair Step SIGN Fazari’s TRIAD
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Ultrasound Diagnosis of Primary Epiploic Appendagitis: A Case Report
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作者 Sylviane Dongmo Joshua Tambe +3 位作者 Yannick Onana Ngwane Ntongwetape Elroy Weledji Emilienne Guegang 《Open Journal of Medical Imaging》 2023年第1期1-10,共10页
A rare differential diagnosis for severe abdominal pain is acute epiploic appendagitis. Its symptoms resemble those of acute diverticulitis, acute appendicitis, or omental infarction quite a bit. The primary imaging m... A rare differential diagnosis for severe abdominal pain is acute epiploic appendagitis. Its symptoms resemble those of acute diverticulitis, acute appendicitis, or omental infarction quite a bit. The primary imaging method used for diagnosis is computed tomography (CT). We are describing the case of a 27-year-old guy who underwent an abdominal ultrasonography after complaining of severe left lower quadrant abdominal pain. It identified an oval and non-compressible hyperechoic mass in the left iliac fossa. The mass was surrounded by a hypoechoic rim and there was no color Doppler signal. In the absence of CT, radiologists must be able to diagnose acute epiploic appendagitis on ultrasound in order to avoid unnecessary hospital admission, pricey laboratory tests, antibiotic treatment, and unnecessary surgery. In this instance, the patient was spared from ionization exposure from a potential CT scan and other invasive treatments including surgery with associated costs because of the reliable ultrasound diagnosis of epiploic appendagitis. After receiving conservative medical treatment, the patient was placed under surveillance and then discharged. 展开更多
关键词 Acute Abdominal Pain Epiploic Appendagitis ultrasound scan
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B-scan ultrasound and cytology of the vitreous in primary central nervous system lymphoma with vitreoretinal involvement 被引量:5
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作者 Jie Lai Kun Chen +6 位作者 Hui-Min Shi Lin Zhuang Xian Zhou Jian-Jiang Xiao Yi Li Bo-Bin Chen Qing-Ping Wang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2019年第6期1001-1007,共7页
AIM: To evaluate the diagnostic value of B-scan ultrasound and explore the cytological characteristics of patients with vitreoretinal lymphoma(VRL) and primary central nervous system lymphoma(PCNSL).METHODS: The clini... AIM: To evaluate the diagnostic value of B-scan ultrasound and explore the cytological characteristics of patients with vitreoretinal lymphoma(VRL) and primary central nervous system lymphoma(PCNSL).METHODS: The clinical data and pathologic specimens from patients with VRL diagnosed at the North Huashan Hospital from 2016 to 2017 were retrospectively reviewed. The patients were diagnosed by slit lamp ophthalmoscopy, B-scan ultrasound, cytology of the vitreous, which was obtained by vitrectomy, and cytokine measurements of interleukin(IL)-10 and IL-6.RESULTS: Twenty-six eyes(19.4%) out of 134 eyes of 67 patients(47 men and 20 women) with PCNSL were diagnosed with VRL by B-scan ultrasound, and 14 eyes(10.4%) were diagnosed by slit lamp ophthalmoscopy. Twenty-four eyes(17.9%) of 17 patients were confirmed as having VRL with cytology. No difference in the association between intracranial lesion location and ocular involvement was found. VRL patients had higher levels of vitreous IL-10 and IL-10/IL-6 when compared with macular hole cases, but the difference was not statistically significant.CONCLUSION: A total of 25.4% of the PCNSL patients had VRL, B-scan ultrasound examination had characteristic features and is recommended over slit lamp ophthalmoscopy for the screening diagnosis of PCNSL with intraocular involvement. Moreover, the cytological and immunohistochemical analyses performed after 25-gauge diagnostic vitrectomy were accurate diagnostic techniques. 展开更多
关键词 primary central nervous LYMPHOMA INTRAOCULAR LYMPHOMA B-scan ultrasound VITRECTOMY INTERLEUKIN-10
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Development of a High-frequency Ultrasound System for High-speed Image Scanning 被引量:1
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作者 WU Jian-xing CHEN Pei-zhan +2 位作者 WANG Jian-lin CHEN Guan-chun CHEN Tai-song 《Chinese Journal of Biomedical Engineering(English Edition)》 2013年第2期79-85,92,共8页
High-frequency image technique has been widely applied in medical diagnosis recently. For high voltage protection, high speed stage and trigger control circuitry are difficult to implement a high-frequency ultrasound ... High-frequency image technique has been widely applied in medical diagnosis recently. For high voltage protection, high speed stage and trigger control circuitry are difficult to implement a high-frequency ultrasound imaging system. In this study, we utilized a linear servo with high noise tolerance and a novel multi-depth expression method to overcome those issues in developed high-speed image system. B-mode image of the chicken phantom by 25 MHz transducer shows the resolution of lateral and axial resolutions are up to 123 μm and 59 μm respectively. In addition, the experiment demonstrates that the axial resolution and depth of field (DOF) can be improved by time gain compensation(TGC) and multi-depth method. The results indicate that the proposed system could achieve over 24 fps for 1 mm scan distance and 100 lines per frame. In the future, the developed system is potential for other clinical applications such as ophthalmology and dermatology. 展开更多
关键词 high-frequency ultrasound time gain compensation (TGC) multi-focus scan
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浸润式B超引导下的A超分段式声速测量在致密型白内障眼轴测量中的准确性
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作者 张帆 陈彦辰 +1 位作者 巫雷 杨波 《国际眼科杂志》 CAS 2024年第8期1319-1323,共5页
目的:观察浸润式B超引导下的A超分段式声速测量在致密型白内障眼轴测量中的准确性。方法:前瞻性研究。选取成都爱尔眼科医院2020-08/2022-08致密型白内障患者86例90眼,男61例59眼,女25例31眼,平均年龄66.49±14.55岁。术前分别采用... 目的:观察浸润式B超引导下的A超分段式声速测量在致密型白内障眼轴测量中的准确性。方法:前瞻性研究。选取成都爱尔眼科医院2020-08/2022-08致密型白内障患者86例90眼,男61例59眼,女25例31眼,平均年龄66.49±14.55岁。术前分别采用接触式A超,浸润式B超引导下A超分段式声速测量法与IOL Master 700测量眼轴(AL)、前房深度(ACD)(含角膜厚度)、角膜曲率(K)、晶状体厚度(LT)、中央角膜厚度(CCT)、白到白角膜直径(WTW)。术后1 wk,使用IOL Master 700的无晶状体眼模式复测眼轴长度。分析三种设备测量眼轴的一致性与相关性。结果:术前接触式A超与浸润式B超引导下A超分段式声速测量眼轴为23.40(22.63,23.89)、23.70(23.04,24.25)mm,术后1 wk IOL Master 700测量眼轴为23.72(23.01,24.27)mm。接触式A超与浸润式B超引导下A超分段式声速测量法、术后IOL Master 700测量眼轴差异均有统计学意义(P=0.018),而浸润式B超引导下A超分段式声速测量法与术后IOL Master 700测量眼轴差异无统计学意义(P=0.991)。通过Bland-Altman分析,浸润式B超引导下A超分段式声速测量法与IOL Master 700测量眼轴有很好的一致性(P=0.0809)。术前浸润式B超引导下A超分段式声速测量法与术后IOL Master 700眼轴正相关(r s=0.992,P<0.0001),术前接触式A超与术后IOL Master 700眼轴正相关(r s=0.989,P<0.0001)。结论:对于致密型白内障,浸润式B超引导下A超分段式声速测量比接触式A超更接近术后IOL Master 700眼轴测量数据,具有良好的相关性和一致性。 展开更多
关键词 眼轴 致密型白内障 IOL Master 700 A超 浸润式B超引导下的A超
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肝癌的影像学检查研究进展
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作者 陈君 陈常云 +1 位作者 韩冬 李雪梅 《影像研究与医学应用》 2024年第8期18-20,共3页
肝癌是全球范围内的主要癌症之一,其早期筛查和诊断对于提高患者的生存率至关重要。影像学检查在肝癌诊断与治疗中占据核心地位。本文综述了肝癌的影像学检查方法的研究进展。首先介绍了影像学检查的重要性,然后详细阐述了超声、计算机... 肝癌是全球范围内的主要癌症之一,其早期筛查和诊断对于提高患者的生存率至关重要。影像学检查在肝癌诊断与治疗中占据核心地位。本文综述了肝癌的影像学检查方法的研究进展。首先介绍了影像学检查的重要性,然后详细阐述了超声、计算机断层扫描、磁共振成像、放射性核素显像等检查方法的发展现状和趋势,以便更好地为患者提供诊疗方案。 展开更多
关键词 肝癌 影像学检查 超声 核素扫描 计算机断层扫描 磁共振成像
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AL-Scan、IOL-Master和A超测量白内障患者眼轴长度的准确性和一致性分析 被引量:11
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作者 孙飒 郭海科 《眼科新进展》 CAS 北大核心 2016年第9期876-878,共3页
目的比较AL-Scan、IOL-Master和A超测量白内障患者眼轴长度(axial length,AL)的准确性和一致性。方法选取年龄相关性白内障患者95例(142眼),术前分别应用AL-Scan、IOL-Master和A超进行AL测量。根据AL将患者分为AL≤22 mm(20眼)、22mm<... 目的比较AL-Scan、IOL-Master和A超测量白内障患者眼轴长度(axial length,AL)的准确性和一致性。方法选取年龄相关性白内障患者95例(142眼),术前分别应用AL-Scan、IOL-Master和A超进行AL测量。根据AL将患者分为AL≤22 mm(20眼)、22mm<AL≤26 mm(98眼)和AL>26 mm(24眼)3组。应用方差分析对3种方法测量的结果进行比较,应用Bland-Altman法对其一致性进行分析。结果 AL≤22 mm组AL-Scan、IOL-Master和A超测得AL结果分别为(21.53±0.30)mm、(21.54±0.29)mm及(21.51±0.30)mm,差异无统计学意义(P>0.05);22 mm<AL≤26 mm组分别为(23.68±0.76)mm、(23.71±0.77)mm及(23.65±0.75)mm,差异无统计学意义(P>0.05);AL>26 mm组分别为(28.46±1.60)mm、(28.50±1.62)mm及(28.40±1.63)mm,差异无统计学意义(P>0.05)。AL测量的95%一致性界限范围是0.20 mm(AL-Scan和IOL-Master)、1.12 mm(IOLMaster和A超)和1.12 mm(AL-Scan和A超)。结论 AL-Scan、IOL-Master和A超测量白内障患者AL同样准确,但AL-Scan与IOL-Master之间具有良好的一致性。 展开更多
关键词 眼轴长度 AL—scan IOL—Master A超
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基2-FFT输入分级截断算法在频域合成孔径超声成像中的研究
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作者 周英钢 刘振兴 +1 位作者 王善辉 李继冯 《传感技术学报》 CAS CSCD 北大核心 2024年第7期1172-1178,共7页
为提高超声频域成像算法的计算速度,提出一种应用于超声频域成像算法的基2-FFT输入分级截断算法。首先,借助于COMSOL多物理场仿真软件,建立钢件中含有孔缝缺陷的有限元模型进行声场仿真。仿真结果得到关于缺陷的回波信号,并通过PSM算法... 为提高超声频域成像算法的计算速度,提出一种应用于超声频域成像算法的基2-FFT输入分级截断算法。首先,借助于COMSOL多物理场仿真软件,建立钢件中含有孔缝缺陷的有限元模型进行声场仿真。仿真结果得到关于缺陷的回波信号,并通过PSM算法对频域内声场进行重建,得到成像区域的聚焦图像,和原始仿真信号的B扫图像相比效果更加直观且成像质量更好,验证了PSM算法的可行性。然后为了避免超声频域成像算法中二维傅里叶变换的冗余计算,进一步提出了支持任意非0值输入的基2-FFT输入分级截断算法。实验结果证明,基2-FFT输入分级截断算法比标准基2-FFT算法快27%,超声频域算法成像速度提高13%。 展开更多
关键词 超声频域成像 基2-FFT B扫成像 分级截断算法 成像速度
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Sirius、Lenstar及接触式A超测量白内障眼生物参数的比较
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作者 邵颖 黄帅 +1 位作者 李晨 刘高勤 《南通大学学报(医学版)》 2024年第4期301-306,共6页
目的:评估眼前节生物测量仪Sirius、光学低相干反射仪Lenstar与接触式A超测量白内障患者眼生物参数的差异性和一致性。方法:选取2022年7月—2023年5月于苏州大学附属第一医院就诊的拟行白内障手术的患者121例(121眼)为研究对象,同一观... 目的:评估眼前节生物测量仪Sirius、光学低相干反射仪Lenstar与接触式A超测量白内障患者眼生物参数的差异性和一致性。方法:选取2022年7月—2023年5月于苏州大学附属第一医院就诊的拟行白内障手术的患者121例(121眼)为研究对象,同一观察者分别应用Sirius、Lenstar和接触式A超测量眼生物参数,比较角膜中央厚度(central corneal thickness,CCT)、前房深度(anterior chamber depth,ACD)、眼轴(axial length,AL)、角膜平均K值(average corneal K value,Ave K)、晶状体厚度(lens thickness,LT)和白到白距离(white to white distance,WTW)的结果。对3种仪器的测量结果采用重复测量方差分析及Pearson相关性分析,并以Bland-Altman法进行一致性分析。结果:Lenstar、Sirius测得的CCT值分别为(530.83±29.70)、(538.37±30.49)μm(P<0.001),Bland-Altman分析显示两者一致性较差(95%LoA:-33.6~18.5,差值均值:-7.5);Ave K值分别为(44.05±1.55)、(43.97±1.52)D(P<0.001),Bland-Altman分析显示两者一致性较好(95%LoA:-0.49~0.63,差值均值:0.07);WTW值分别为(11.56±0.37)、(11.31±0.36)mm(P<0.001),Bland-Altman分析显示两者一致性较好(95%LoA:-0.29~0.79,差值均值:0.25);接触性A超、Lenstar、Sirius测得的ACD值分别为(3.03±0.42)、(3.19±0.37)、(3.25±0.37)mm,三者差异有统计学意义(P<0.001),Bland-Altman分析显示两两仪器间的一致性较好(95%LoA分别为:-0.34~0.23,-0.49~0.16,-0.65~0.21,差值均值分别为:-0.05、-0.17、-0.22);接触式A超、Lenstar测量的AL分别为(24.31±2.42)、(24.60±2.51)mm,差异有统计学意义(P<0.001),Bland-Altman分析显示两者的一致性较差(95%LoA:-0.64~0.06,差值均值:-0.29);LT值分别为(4.30±0.60)、(4.32±0.40)mm,差异无统计学意义(P>0.05),Bland-Altman分析显示两者一致性较好(95%LoA:-0.75~0.71,差值均值:-0.02)。Pearson相关性分析显示对于上述眼球参数的测量结果,不同测量方法间均呈正相关。结论:Lenstar和Sirius对于白内障患者眼生物参数Ave K、LT和WTW具有较好的一致性,尤其是LT,两者的测量结果可以互相转换,而对于CCT的测量,两者间差异大且一致性差。接触式A超、Lenstar和Sirius 3种仪器对于ACD的测量虽不能互相转换,但具有较好的一致性。接触式A超与Lenstar测量AL,两者间差异大且一致性较差。 展开更多
关键词 白内障 生物测量 LENSTAR Sirius A型超声
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多模态超声校正BI-RADS 4类乳腺肿块的价值
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作者 黄思 肖耀成 +3 位作者 金林原 张敏 李建 张艳芬 《分子影像学杂志》 2024年第1期52-56,共5页
目的 探讨乳腺自动容积成像(ABVS)、超声弹性评分(UES)及两者联合在校正乳腺影像报告和数据系统分级(BI-RADS) 4类乳腺肿块BI-RADS分级中的应用价值。方法 收集我院经常规超声诊断为BI-RADS 4类的乳腺肿块患者109例,共113个肿块。经ABVS... 目的 探讨乳腺自动容积成像(ABVS)、超声弹性评分(UES)及两者联合在校正乳腺影像报告和数据系统分级(BI-RADS) 4类乳腺肿块BI-RADS分级中的应用价值。方法 收集我院经常规超声诊断为BI-RADS 4类的乳腺肿块患者109例,共113个肿块。经ABVS及UES校正BI-RADS分级后,与病理结果对比,绘制ROC曲线,比较常规超声、ABVS、UES、ABVS联合UES诊断BI-RADS 4类乳腺肿块的差异。结果 109例患者113个肿块中包含良性78个,恶性35个,ABVS联合UES校正后的敏感度、特异性、准确性、ROC曲线下面积分别为94.29%、93.59%、93.80%、0.975。结论 ABVS联合UES有助于提高BI-RADS 4类肿块的总体诊断效能。两者联合诊断可以取长补短,提高诊断率。 展开更多
关键词 乳腺自动容积成像 超声弹性评分 常规超声 乳腺影像报告和数据系统分级 乳腺肿块
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油气混输管道在线腐蚀检测及安全评估
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作者 梁峰 《化工管理》 2024年第1期35-37,共3页
针对塔河油田单井管线油气混输介质长期停用存在腐蚀问题,通过腐蚀因素和腐蚀原因初步分析,认为该管道存在内腐蚀风险。通过采用在线腐蚀检测技术,对单井管线开展腐蚀检测及评价,通过现场对管道5个开挖探坑的检测,开挖检测部分的管道安... 针对塔河油田单井管线油气混输介质长期停用存在腐蚀问题,通过腐蚀因素和腐蚀原因初步分析,认为该管道存在内腐蚀风险。通过采用在线腐蚀检测技术,对单井管线开展腐蚀检测及评价,通过现场对管道5个开挖探坑的检测,开挖检测部分的管道安全强度达到继续使用的等级。但是由于仅是局部探坑检测,不排除管道其他部位存在极严重腐蚀,建议对该管线进一步开展试压,通过试压确定管线的承压能力和排查薄弱点,为下一步开展腐蚀治理提供依据。 展开更多
关键词 油气混输管线 超声C扫描 剩余强度评价 在线检测
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岳西小黄姜精油提取优化及成分分析 被引量:1
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作者 马卓云 王洪新 《天然产物研究与开发》 CAS CSCD 北大核心 2024年第4期562-571,共10页
为了确定岳西小黄姜精油最佳提取工艺,探究不同提取方法对小黄姜精油得率和微观结构的影响,建立岳西小黄姜挥发性物质GC-MS检测方法。该研究分别采用水蒸气蒸馏法、超声辅助水蒸气蒸馏法、超声-微波协同辅助水蒸气蒸馏法、超声-酶解协... 为了确定岳西小黄姜精油最佳提取工艺,探究不同提取方法对小黄姜精油得率和微观结构的影响,建立岳西小黄姜挥发性物质GC-MS检测方法。该研究分别采用水蒸气蒸馏法、超声辅助水蒸气蒸馏法、超声-微波协同辅助水蒸气蒸馏法、超声-酶解协同辅助水蒸气蒸馏法提取小黄姜精油。比较各方法的精油得率,选择得率最高的方法进行单因素试验和正交优化确定最佳提取工艺。结果表明,超声-酶解协同辅助水蒸气蒸馏法的精油得率最高,最佳提取工艺为:料液比1∶3.5(g/mL)、超声温度50℃、超声功率400 W、超声时间20 min、复合酶用量(半纤维素酶∶β-葡萄糖苷酶=1∶1)40 U/g、酶解温度40℃、酶解pH值5.5、酶解时间2 h、提取时间45 min。在此条件下精油得率为3.28%。对精油提取后的姜渣进行扫描电镜观察,经超声-酶解协同辅助水蒸气蒸馏法得到的姜渣细胞完整性破坏最为严重,说明该方法对精油的提取更为彻底。采用顶空固相微萃取(headspace solid-phase microextraction, HS-SPME)提取法和超声-酶解协同辅助水蒸气蒸馏法从鲜姜中共提取鉴定出75种挥发性物质,其中HS-SPME提取法鉴定出49种,超声-酶解协同辅助水蒸气蒸馏法提取鉴定出60种。本研究为小黄姜精油提取提供了新思路,并为生姜深加工利用提供了参考依据。 展开更多
关键词 小黄姜精油 超声-酶解协同辅助水蒸气蒸馏法 扫描电镜 气相色谱-质谱法
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超声造影与增强CT检查诊断小肝癌效能比较
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作者 郝永欣 孟祥安 +4 位作者 骆允 高美丽 刘欢 刘磊 沈荣 《实用肝脏病杂志》 CAS 2024年第1期88-91,共4页
目的分析比较超声造影(CEUS)与增强CT诊断对小肝细胞癌(HCC)的效能。方法2020年1月~2022年6月我院诊治的104肝脏小结节患者,病灶直径≤3.0 cm。均接受CEUS和增强CT检查,以穿刺活检或手术组织病理学检查诊断。应用2018年版肝脏影像报告... 目的分析比较超声造影(CEUS)与增强CT诊断对小肝细胞癌(HCC)的效能。方法2020年1月~2022年6月我院诊治的104肝脏小结节患者,病灶直径≤3.0 cm。均接受CEUS和增强CT检查,以穿刺活检或手术组织病理学检查诊断。应用2018年版肝脏影像报告和数据系统(LI-RADS)对肝脏小结节分类,分析CEUS与增强CT诊断小肝癌的效能。结果CEUS与增强CT对肝脏小结节分类有93例(89.4%)一致,一致性良好(Kappa系数=0.749,P<0.05);在104肝脏小结节患者中,经病理学检查明确诊断为HCC者42例(高分化29例,低分化13例),肝脏良性结节62例;Kappa一致性检验显示,CEUS与增强CT诊断小肝癌均有较高的效能(P均<0.05),CEUS与增强CT以LR-4/LR-5为判断HCC的标准,与金标准诊断的一致性较高(Kappa=0.861和Kappa=0.803),显示CEUS的诊断效能稍优于增强CT诊断;高分化HCC患者CEUS检查达峰时间和开始廓清时间分别为(29.4±4.8)s和(62.4±5.7)s,均显著长于低分化者【分别为(25.0±4.3)s和(51.8±5.2)s,P均<0.05】。结论CEUS和增强CT检查诊断小肝癌均有较高的效能,在某些情况下,CEUS检查可能更具优越性,对评估肿瘤细胞分化程度可能有帮助。 展开更多
关键词 肝细胞癌 超声造影 增强CT 诊断
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The ultrasound diagnosis of fetal gastric teratoma
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作者 Lixue Zhou Ruike Pan Xin Zhang Lirong He 《The Chinese-German Journal of Clinical Oncology》 CAS 2010年第11期666-668,共3页
Objective: The aim of the study was to discuss the value of ultrasound examination in the diagnosis of fetal gastric teratoma. Methods: We retrospectively analyzed 2 cases with fetal gastric teratoma in our hospital (... Objective: The aim of the study was to discuss the value of ultrasound examination in the diagnosis of fetal gastric teratoma. Methods: We retrospectively analyzed 2 cases with fetal gastric teratoma in our hospital (Department of Gynecology and Obstetrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China). It involved clinical, ultrasonic, X-ray, CT and MRI, biochemical, pathological, karyotype and immunohistochemical data. Results: There both were hybrid echo masses in the abdominal of the fetus with the sonography and the ultrasound features which mostly like the teratomas. Two cases were dead after induced abortion. The pathological results of the mass were gastric immature teratoma in one, and stomach mature teratoma in another. Conclusion: Fetal gastric teratoma is rarely seen and easily be misdiagnosed in clinic. The diagnosis depends finally on pathological examination. Ultrasound scan as the easy and direct method is helpful to clew the diagnosis of fetal gastric teratoma. 展开更多
关键词 fetal gastric teratoma ultrasound scan PATHOLOGY
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在体全眼微血流超声超分辨成像
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作者 张昌露 雷爽 +2 位作者 刘佳妹 商东庆 马腾 《集成技术》 2024年第1期106-116,共11页
多类眼科疾病的早期阶段一般伴有血管的形态学和血流动力学改变,因此,全眼微血管评估对眼科疾病的综合诊断具有重要作用。由于光学成像技术的穿透深度有限,特别是在介质透光率低的情况下,现有的光学成像技术难以对整个眼睛的微血管进行... 多类眼科疾病的早期阶段一般伴有血管的形态学和血流动力学改变,因此,全眼微血管评估对眼科疾病的综合诊断具有重要作用。由于光学成像技术的穿透深度有限,特别是在介质透光率低的情况下,现有的光学成像技术难以对整个眼睛的微血管进行可视化。为此,该文开发了一种超声超分辨成像技术,可以微米级分辨率可视化全眼三维微血管系统。首先,用中心频率为10 MHz的线性阵列快速采集多帧序列;其次,经过微泡信号提取,中心点定位,追踪和中心点叠加得到一个剖面的超分辨率图像;最后,将机械扫描的所有剖面重建为兔全眼三维超分辨率微血管图像。实验结果证明,超声定位显微镜可以显示整个眼睛的微血管系统,这对眼科疾病的早期诊断具有重要意义。 展开更多
关键词 眼睛微血流 超分辨成像 机械扫描 微泡 超声
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超声雷达综合法检测钢筋混凝土构件内部缺陷研究
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作者 杨君奕 《四川建材》 2024年第8期51-53,共3页
设计了一块内置不同人工缺陷的钢筋混凝土试块,结合探地雷达扫描成像法和相控阵超声成像法对试块内置缺陷进行检测,并通过钻芯取样法对结果进行验证。结果表明,探地雷达成像法和相控阵超声成像法均能准确反映混凝土内部缺陷,探地雷达具... 设计了一块内置不同人工缺陷的钢筋混凝土试块,结合探地雷达扫描成像法和相控阵超声成像法对试块内置缺陷进行检测,并通过钻芯取样法对结果进行验证。结果表明,探地雷达成像法和相控阵超声成像法均能准确反映混凝土内部缺陷,探地雷达具有更高的灵敏度,相控阵超声成像法成像更直观。 展开更多
关键词 相控阵超声成像 探地雷达扫描成像 缺陷检测 钻芯取样 空鼓
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冠脉联合头颈血管CTA诊断技术在头颈部血管疾病中的应用研究
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作者 杨杨 《智慧健康》 2024年第15期6-9,13,共5页
目的浅析冠脉超声联合头颈血管造影(CTA)诊断技术在头颈部血管疾病中的应用价值。方法选取2018年9月—2019年9月本院收治的160例头颈部血管疾病患者为研究对象,给予冠脉超声联合头颈血管CTA扫描检查,检测患者头颈部血管病变血管管腔的... 目的浅析冠脉超声联合头颈血管造影(CTA)诊断技术在头颈部血管疾病中的应用价值。方法选取2018年9月—2019年9月本院收治的160例头颈部血管疾病患者为研究对象,给予冠脉超声联合头颈血管CTA扫描检查,检测患者头颈部血管病变血管管腔的特点以及脑部血流相关指标,采用超声三分位统计,同时分析单独冠脉超声与联合冠脉超声的异质性差异。结果在患者头颈部血管管腔面积在超声三分位统计中的第3分位与第1、第2分位存在统计学差异(P<0.05),第1分位与第2分位不存在统计学差异(P>0.05);管腔最大径则第2分位与第1、第3分位存在统计学差异(P<0.05),第1和第3分位不存在统计学差异(P>0.05);管腔最小径在超声三分位统计中的3个分位均存在统计学差异(P<0.05);管腔平均径第3分位与第1、第2分位存在统计学差异(P<0.05),第1分位与第2分位不存在统计学差异(P>0.05);和管腔偏心指数在3个分位均存在统计学差异(P<0.05)。患者血管平均血流量(Q_(mean),Q_(m))第3分位与第1、第2分位存在统计学差异(P<0.05),第1分位与第2分位不存在统计学差异(P>0.05);脉搏速度(P_(WV),W_(V))第2分位与第1、第3分位存在统计学差异(P<0.05),第1和第3分位不存在统计学差异(P>0.05);血管特性阻抗(Z_(C),Z_(CV))在3个分位均存在显著差异(P<0.01);外周阻力(TPR,R_(V))第3分位与第1、第2分位存在统计学差异(P<0.05),第1分位与第2分位不存在统计学差异(P>0.05)。两种诊断检测方法的各异质性检测指标值之间均存在差异(P<0.05),冠脉超声联合头颈血管CTA检查诊断异质性指标值中的敏感度、特异度和诊断比值比分别为0.95、0.86和56.12,而仅采用冠脉超声的敏感度、特异度和诊断比值比仅为0.83、0.81和23.65。结论冠脉联合头颈血管CTA扫描检查在头颈部血管疾病的诊断效果较仅采用冠脉超声的效果更好,值得临床广泛推广使用。 展开更多
关键词 冠脉超声 CTA扫描 头颈部血管疾病 应用研究
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