1. Capital Medical University

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    1. Mentioned In 51 Articles

    2. Optical Coherence Tomography Angiography Vessel Density Changes after Acute Intraocular Pressure Elevation

      Optical Coherence Tomography Angiography Vessel Density Changes after Acute Intraocular Pressure Elevation
      To investigate changes in retinal vessel density in optic nerve head (ONH) and macula after acute intraocular pressure (IOP) elevation, we conducted a prospective observational study. Eyes with IOP rise 5mmHg after 2-hour dark room prone provocative test (DRPPT) were included. Vasculature of ONH and macula was examined by optical coherence tomography angiography (OCTA) at baseline and after DRPPT. Among the 65 eyes of 42 individuals, 40 eyes with qualified ...
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    3. Application of Excimer Laser Coronary Atherectomy Guided by Optical Coherence Tomography in the Treatment of a Severe Calcified Coronary Lesion

      Application of Excimer Laser Coronary Atherectomy Guided by Optical Coherence Tomography in the Treatment of a Severe Calcified Coronary Lesion
      To the Editor: A 73-year-old female was referred to our hospital for evaluation of unstable angina pectoris. She had a greater than 10-year history of hypertension. Coronary angiography (CAG) was performed in another hospital in March 2017, which showed diffuse calcific stenosis (about 90%) in the proximal and mid-left anterior descending (LAD) artery, 70% stenosis in the ostial obtuse marginal branch, and no apparent stenosis in the right coronary artery ...
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    4. Evaluation of marginal gap of lithium disilicate glass ceramic crowns with optical coherence tomography

      Evaluation of marginal gap of lithium disilicate glass ceramic crowns with optical coherence tomography
      arginal gap (MG) was the most important factor to evaluate the success of crowns. The study was to assess the MG of lithium disilicate glass ceramic crowns with spectral domain optical coherence tomography (OCT) and stereomicroscopy in vitro , and to provide evidence to measure the MG with OCT. Consistency was observed between OCT and stereomicroscopy to measure the MG after cementation. There was no significant difference between the MG of ...
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    5. Assessment of Corneal Biomechanical Properties with Inflation Test Using Optical Coherence Tomography

      Assessment of Corneal Biomechanical Properties with Inflation Test Using Optical Coherence Tomography
      Biomechanical properties are important for the cornea to maintain its normal shape and function. There is still a need to develop better methods for accurate measurement of corneal mechanical properties. In this study, we propose to introduce the optical coherence tomography (OCT) in inflation test for the imaging of corneal deformation in order to measure its biomechanical properties. Ten cornea-mimicking silicone phantoms with different stiffness and five fresh porcine corneas ...
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    6. The impact of acute coronary syndrome on late drug-eluting stents restenosis: Insights from optical coherence tomography

      The impact of acute coronary syndrome on late drug-eluting stents restenosis: Insights from optical coherence tomography
      The aim of the study was to investigate the optical coherence tomography (OCT)-identified difference of in-stent restenosis (ISR) tissue characteristics between patients with and without acute coronary syndrome (ACS) at index intervention. The retrospective study included 80 patients with 85 drug-eluting stent (DES) restenosis lesions. Subjects were classified according to clinical presentation at the time of de-novo lesion intervention, namely ACS and non-ACS. OCT was performed at 5 years ...
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    7. Measurement of the absolute velocity of blood flow in early-stage chick embryos using spectral domain optical coherence tomography

      Measurement of the absolute velocity of blood flow in early-stage chick embryos using spectral domain optical coherence tomography
      Doppler optical coherence tomography (OCT) is a noninvasive imaging modality that provides quantitative flow information with high spatial and temporal resolution. However, it is only sensitive to the flow velocity vector parallel to the incident beam. To calculate the absolute velocity, it is necessary to obtain the angle between the incident beam and flow field. In this paper, we describe a practical method to measure the Doppler angle based on ...
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    8. Subfoveal Choroidal and Macular Thickness Changes after Phacoemulsification Using Enhanced Depth Imaging Optical Coherence Tomography

      Subfoveal Choroidal and Macular Thickness Changes after Phacoemulsification Using Enhanced Depth Imaging Optical Coherence Tomography
      Purpose: To assess changes in the thickness of the subfoveal retina and choroid after phacoemulsification using enhanced depth imaging optical coherence tomography (EDI-OCT). Methods: A prospective study was conducted on 100 patients. The subfoveal choroidal thickness (SFCT) was measured at 7 points and the retinal thickness was measured at 5 points (before surgery, and 1 day, 1 week, 1 month, and 3 months after surgery). Results: The foveal choroidal thickness ...
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    9. Serial Assessment of Tissue Precursors and Progression of Coronary Calcification Analyzed by Fusion of IVUS and OCT

      Serial Assessment of Tissue Precursors and Progression of Coronary Calcification Analyzed by Fusion of IVUS and OCT
      Objectives The aim of this study was to assess calcium growth with fused grayscale intravascular ultrasound (IVUS), IVUSvirtual histology, and optical coherence tomography (OCT) from baseline to 5-year follow-up in patients treated with bioresorbable vascular scaffolds. Background IVUS and OCT have individual strengths in assessing plaque composition and volume. Fusion of images obtained using these methods could potentially aid in coronary plaque assessment. Methods Anatomic landmarks and endoluminal radiopaque markers ...
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    10. In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography

      In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography
      Objectives The aim of this study was to evaluate optical coherence tomography (OCT) and intravascular ultrasound (IVUS) versus coronary angiography in the assessment of target lesion calcification and its effect on stent expansion. Background IVUS is more sensitive than angiography in the detection of coronary artery calcium, but the relationship among IVUS, OCT, and angiography has not been studied. Methods Overall, 440 lesions (440 patients with stable angina) underwent OCT- ...
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    11. Optical Coherence Tomography Assessment of Glucose Fluctuation Impact on the Neointimal Proliferation After Stent Implantation in a Diabetic/Hypercholesterolemic Swine Model

      Optical Coherence Tomography Assessment of Glucose Fluctuation Impact on the Neointimal Proliferation After Stent Implantation in a Diabetic/Hypercholesterolemic Swine Model
      The aim of the present study was to investigate the effects of glucose fluctuation on neointimal proliferation after stent implantation by optical coherence tomography (OCT) in a diabetic/hypercholesterolemic (DM/HC) swine model. A total of 24 everolimus-eluting stents (EES) were implanted in the right coronary artery (RCA) of the animals using a 20% overstretch ratio. The 24 swines were divided into a DM-high glucose fluctuation (HGF) group (n = 8 ...
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    12. POLYPOIDAL CHOROIDAL VASCULOPATHY UPON OPTICAL COHERENCE TOMOGRAPHIC ANGIOGRAPHY

      POLYPOIDAL CHOROIDAL VASCULOPATHY UPON OPTICAL COHERENCE TOMOGRAPHIC ANGIOGRAPHY
      Purpose: To study polypoidal lesions and branching choroidal vascular networks in eyes with polypoidal choroidal vasculopathy by optical coherence tomography (OCT)-based angiography (OCTA). Methods: In the observational cross-sectional study, patients with polypoidal choroidal vasculopathy, as diagnosed by indocyanine green angiography, underwent OCTA. Results: Thirty-two eyes of 31 patients with an age of 61.1 +/- 7.6 years were included. Branching choroidal vascular networks were detected by indocyanine green angiography ...
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    13. Vascular flow density in pathological myopia: an optical coherence tomography angiography study

      Vascular flow density in pathological myopia: an optical coherence tomography angiography study
      Objectives To investigate vascular flow density in pathological myopia with optical coherence tomography (OCT) angiography. Design A prospective comparative study was conducted from December 2015 to March 2016. Setting Participants were recruited in Beijing Tongren Hospital. Participants A total of 131 eyes were enrolled, which were divided into three groups: 45 eyes with emmetropia (EM; mean spherical equivalent (MSE) 0.50D to 0.50D), 41 eyes with high myopia (HM ...
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    14. Retinal segmented layers with strong aquaporin-4 expression suffered more injuries in neuromyelitis optica spectrum disorders compared with optic neuritis with aquaporin-4 antibody seronegativity detected by optical coherence tomography

      Retinal segmented layers with strong aquaporin-4 expression suffered more injuries in neuromyelitis optica spectrum disorders compared with optic neuritis with aquaporin-4 antibody seronegativity detected by optical coherence tomography
      Purpose To evaluate retinal segmented layer alterations in optic neuritis (ON) in an AQP4-Ab seropositive (AQP4-Ab+/ON) cohort and in neuromyelitis optica (NMO) with ON eyes (NMO-ON) compared with an AQP4-Ab seronegative ON (AQP4-Ab/ON) cohort using optical coherence tomography (OCT). Methods We recruited 109 patients with ON (161 eyes) and 47 healthy controls. All patients with ON were subdivided into three subcohorts: 37 patients (54 eyes) with AQP4-Ab+/ON ...
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    15. Application of optical coherence tomography angiography in assessment of posterior scleral reinforcement for pathologic myopia

      Application of optical coherence tomography angiography in assessment of posterior scleral reinforcement for pathologic myopia
      AIM : To investigate the effect of posterior scleral reinforcement (PSR) on circulation of pathologic myopia eyes with posterior staphyloma by optical coherence tomography angiography (OCTA). METHODS : The study included 30 pathologic myopia eyes with posterior staphyloma which underwent PSR (PSR group) for 6 to 18mo ago, and 30 age and myopia matched eyes without PSR surgery as control group. Macular, choriocapillaris and radial peripapillary capillary (RPC) flow density were measured ...
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    16. Hemodynamic changes in a rat parietal cortex after endothelin-1-induced middle cerebral artery occlusion monitored by optical coherence tomography

      Hemodynamic changes in a rat parietal cortex after endothelin-1-induced middle cerebral artery occlusion monitored by optical coherence tomography
      A blockage of the middle cerebral artery (MCA) on the cortical branch will seriously affect the blood supply of the cerebral cortex. Real-time monitoring of MCA hemodynamic parameters is critical for therapy and rehabilitation. Optical coherence tomography (OCT) is a powerful imaging modality that can produce not only structural images but also functional information on the tissue. We use OCT to detect hemodynamic changes after MCA branch occlusion. We injected ...
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  2. About Capital Medical University

    Capital Medical University

    Capital Medical University (CMU) was founded in 1960. It ranks among the top academic medical institutions in Chin and is considered as one of the key municipal universities in Beijing. The founding President, Professor Wu Jieping, was a world-renowned urologist, member of both the Chinese Academy of Sciences and the Chinese Academy of Engineering. The current President is Professor Lu Zhaofeng.