检索结果-南通市图书馆

In vivo assessment of structural changes of the urethra in lower urinary tract disease using cross-polarization optical coherence tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2020年第6期3卷 55-70页

作者： Elena B.Kiseleva Alexander A.Moiseev Anton S.Kuyarov Muhammat A.Molvi Grigory V.Gelikonov Anna V.Maslennikova Olga S.Streltsova Privolzhsky Research Medical University 10/1 Minin and Pozharsky Square 603005 Nizhny NovgorodRussia Institute of Applied Physics Russian Academy of Sciences Ulyanova Street 46603950Nizhny NovgorodRussia

The paper presents the results of a study of the female urethra in cases of urethral pain syndrome(UPS)and inflammatory diseases of the lower urinary tract using cross-polarization optical coherence tomography(CP OCT).Urethral wall structure was studied in 86 patients;233 CP OCT images were collected.A comparative qualitative analysis of three groups of CP OCT images—"norm","Inflammation"and"UPS"—identified that despite the absence of a clear inflammatory factor in the patient's examination,the urethral tissues in UPS were in an altered *** changes in the urethral wall with UPS and in cases of inflammation were *** a point scale,three experts independently performed visual scoring of the CP OCT *** parameters:epithelial contrast,cavities and the minimum signal depth in the co-channel were *** was found that,individually,the parameters correlate only weakly with the *** under the receiver operating characteristic(ROC)curve was from 0.51 to *** joint use of a number of visual signs has a greater diagnostic value than the use of the criteria *** under the ROC curve using the developed cumulative criterion reached up to *** study could form the basis of a scoring system for assessing the state of the urethral tract using CP OCT images in real *** CP OCT method provides information on the state of urethral tissues that cannot be obtained with traditional cystoscopy.

关键词： Cross-polarization optical coherence tomography urethral pain syndrome connective tissue visual analysis of images automatic classification of images

Layers of interstitial fluid flow along a“slit-shaped”vascular adventitia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2021年第8期22卷 647-663页

作者： Hongyi LI You LYU Xiaoliang CHEN Bei LI Qi HUA Fusui JI Yajun YIN Hua LI Cardiology Department Xuanwu HospitalCapital Medical UniversityBeijing 100053China Cardiology Department Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Radiology Department China-Japan Friendship HospitalBeijing 100029China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China

Interstitial fluid(ISF)flow through vascular adventitia has been discovered ***,its kinetic pattern was *** used histological and topographical identification to observe ISF flow along venous vessels in *** magnetic resonance imaging(MRI)in live subjects,the inherent pathways of ISF flow from the ankle dermis through the legs,abdomen,and thorax were enhanced by paramagnetic *** fluorescence stereomicroscopy and layer-by-layer dissection after the rabbits were sacrificed,the perivascular and adventitial connective tissues(PACTs)along the saphenous veins and inferior vena cava were found to be stained by sodium fluorescein from the ankle dermis,which coincided with the findings by *** direction of ISF transport in a venous PACT pathway was the same as that of venous blood *** confocal microscopy and histological analysis,the stained PACT pathways were verified to be the fibrous connective tissues,consisting of longitudinally assembled ***-time observations by fluorescence stereomicroscopy revealed at least two types of spaces for ISF flow:one along adventitial fibers and another one between the vascular adventitia and its covering *** nanoparticles and surfactants,a PACT pathway was found to be accessible by a nanoparticle of<100 nm and contained two parts:a transport channel and an absorptive *** calculated velocity of continuous ISF flow along fibers of the PACT pathway was 3.6-15.6 mm/*** data revealed that a PACT pathway was a"slit-shaped"porous biomaterial,comprising a longitudinal transport channel and an absorptive part for *** use of surfactants suggested that interfacial tension might play an essential role in layers of continuous ISF flow along vascular vessels.A hypothetical"gel pump"is proposed based on interfacial tension and interactions to regulate ISF *** experimental findings may inspire future studies to explore the physiological and pathophysiological functions of

关键词： Vascular adventitia Interstitial fluid connective tissue Interfacial zone

Quantitative T2＊-Mapping of the Knee Using a Spoiled Gradient Echo Sequence at 3 Tesla： Preliminary Results

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmacy and Pharmacology 2014年第1期2卷 59-69页

作者： Georg Riegler Xeni Deligianni Vladimir Juras Stefan Zbjgfi Sebastian Apprich Pavol Szomolanyi Michael Weber Oliver Bieri Siegfried Trattnig Department of Biomedical Imaging and Image-guided Therapy MR Center of Excellence for High Field MR Medical Universityof Vienna Vienna 1090 Austria Department of Radiology Division of Radiological Physics University of Basel Hospital Basel 4031 Switzerland Department of Imaging Methods Institute of Measurement Science Slovak Academy of Sciences Bratislava 84104 Slovakia

Purpose： To evaluate a me-vTE-SPGR （multi echo variable TE Spoiled Gradient Echo Sequence） approach for quantitative T2＊ mapping of the ME （menisci）, the PT （patellar tendon）, the ACL （anterior cruciate ligament）, the PCL （posterior cruciate ligament） and to compare the results between normal and pathological tissue of the ME in the knee joint at 3T （3 Tesla）. Methods： Eighteen consecutive knee patients （35.7± 11.6 years） were examined on 3T. In addition to standard morphological MRI, T2＊-maps were derived from a 0.7 mm isotropic me-vTE-SPGR scan. T2＊-values were assessed by two independent observers using an ROI analysis for the ME （4 different regions： posterior and anterior horn of the medial and lateral meniscus）, PT, ACL and PCL. Intra-class correlation between readers was calculated. Results： On morphological MRI, the PT, ACL and PCL were diagnosed as normal in all cases. Degenerative meniscus and meniscal tears were diagnosed in 13 cases and 9 cases, respectively. T2＊-values of the menisci on me-vTE-SPGR scans, in relation to morphological imaging, were normal （N = 50; 6.0 ±0.9 ms）; degenerative meniscus （N = 13; 8.0± 1.6 ms）; meniscal tears （N = 9; 12.9 ±3.9 ms）, with significant differences between all groups （P 〈 0.05）/ significantly higher T2＊-values in degenerative meniscus and meniscal tears. Mean T2＊ relaxation times for the PT, ACL and PCL were 2.9± 0.8 ms, 8.4 ± 1.6 ms and 8.9 ＋ 1.3 ms respectively. Intra-class correlation values between readers for the ME, PT, ACL and PCL were R2 = 0.962, R2 = 0.927, R2 = 0.594 and R2= 0.648, respectively. Conclusion： Isotropic 3D （three-dimensional） me vTE-SPGR imaging is able to quantify T2＊ values of multiple tissues in the knee joint with short T2 relaxation times.

关键词： Magnetic resonance imaging quantitative imaging T2* imaging connective tissue knee.

The role of mechanoreceptors in acupuncture

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Medicine in Novel Technology and Devices 2023年第1期17卷 81-85页

作者： Shu Han Beihang University School of Engineering MedicineBeijing100191China

Acupuncture has been used for centuries to heal the body;it is essential to comprehend the mechanism of acupuncture within the modern medical *** far much research provided a modern scientific understanding of how acupuncture works,most of them indicated that nervous system is ***,few studies have been conducted on how acupuncture trigger the nervous *** the thin needle inserts the acupoint,the mechanical stress generated by acupuncture is the key factor of acupuncture *** first peripheral receptors activated in this process are mechanoreceptors,which are sensitive to mechanical *** purpose of this review is to explore the connection between the mechanoreceptors located in the skin and subcutaneous tissues and the acupuncture *** also attempts to clue the possible roles of mechanoreceptors in the skin surface and subcutaneous tissue during the acupuncture manipulation and electroacupuncture.

关键词： Mechanoreceptors Acupuncture Needle manipulation Electroacupuncture connective tissue