Mingwu Wang

University of Southern California, Los Angeles, CA, United States

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Publications (5)21.87 Total impact

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    ABSTRACT: PURPOSE:: To improve the diagnosis of glaucoma by combining time-domain optical coherence tomography (TD-OCT) measurements of the optic disc, circumpapillary retinal nerve fiber layer (RNFL), and macular retinal thickness. PATIENTS AND METHODS:: Ninety-six age-matched normal and 96 perimetric glaucoma participants were included in this observational, cross-sectional study. Or-logic, support vector machine, relevance vector machine, and linear discrimination function were used to analyze the performances of combined TD-OCT diagnostic variables. RESULTS:: The area under the receiver-operating curve (AROC) was used to evaluate the diagnostic accuracy and to compare the diagnostic performance of single and combined anatomic variables. The best RNFL thickness variables were the inferior (AROC=0.900), overall (AROC=0.892), and superior quadrants (AROC=0.850). The best optic disc variables were horizontal integrated rim width (AROC=0.909), vertical integrated rim area (AROC=0.908), and cup/disc vertical ratio (AROC=0.890). All macular retinal thickness variables had AROCs of 0.829 or less. Combining the top 3 RNFL and optic disc variables in optimizing glaucoma diagnosis, support vector machine had the highest AROC, 0.954, followed by or-logic (AROC=0.946), linear discrimination function (AROC=0.946), and relevance vector machine (AROC=0.943). All combination diagnostic variables had significantly larger AROCs than any single diagnostic variable. There are no significant differences among the combination diagnostic indices. CONCLUSIONS:: With TD-OCT, RNFL and optic disc variables had better diagnostic accuracy than macular retinal variables. Combining top RNFL and optic disc variables significantly improved diagnostic performance. Clinically, or-logic classification was the most practical analytical tool with sufficient accuracy to diagnose early glaucoma.
    Journal of glaucoma 07/2012; · 1.74 Impact Factor
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    ABSTRACT: To investigate the relationship between optical coherence tomography (OCT)-derived measurements of retinal morphology and visual acuity in patients with neovascular age-related macular degeneration (AMD). Retrospective cross-sectional study. A total of 216 consecutive patients (216 eyes) newly diagnosed with neovascular AMD who underwent StratusOCT imaging at the time of diagnosis. Best-corrected Snellen visual acuity was recorded for each patient. Raw exported StratusOCT images for each patient were analyzed using publicly available custom software entitled "OCTOR," which allows the precise positioning of prespecified boundaries on individual B-scans. Thickness and volume were calculated for morphologic parameters of interest: neurosensory retina, subretinal fluid, subretinal tissue (SRT), and pigment epithelial detachment. OCT-derived measurements of retinal morphology and visual acuity. An increased total volume of SRT was correlated with decreased visual acuity (r = 0.370, P<0.0001). Decreased visual acuity was also modestly correlated with increased thickness of the neurosensory retina at the foveal center point (r = 0.245, P = 0.0004). No statistically significant association was detected between visual acuity and the total volume of subretinal fluid or pigment epithelial detachment. The association between visual acuity and both the neurosensory retina and the SRT was stronger for lesions classified as minimally classic or occult on fluorescein angiography. For occult lesions, 20% of the variation in visual acuity could be predicted by a multiple regression model that incorporated age and SRT volume, whereas, for minimally classic lesions, 62% of the variation in visual acuity could be predicted by a multiple regression model that incorporated age, total neurosensory retinal volume, and total SRT volume. The presence of increased SRT thickness and volume on OCT, and to a lesser extent increased neurosensory retinal thickness and volume, is associated with decreased visual acuity in neovascular AMD. However, because of the complex pathophysiology of neovascular AMD and, in part, the limitations of StratusOCT, these factors only account for a small degree of the variation in visual acuity that these patients exhibit. The detection of stronger correlations between retinal anatomy and visual acuity is likely to require the use of more advanced imaging modalities. Proprietary or commercial disclosure may be found after the references.
    Ophthalmology 10/2008; 115(12):2206-14. · 5.56 Impact Factor
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    ABSTRACT: To describe the clinicopathologic and immunohistochemical features of a rare case of myxofibrosarcoma (MFS) involving the orbit. Retrospective interventional case report and review of literature. The clinical history, systemic imaging studies, and histopathologic results of the orbital biopsy are reviewed. Clinical, radiologic, and histologic features of MFS. A 63-year-old Chinese male sought treatment for a history of rapidly progressive proptosis associated with decreased vision in the left eye over 10 days. Magnetic resonance imaging of the orbit revealed a homogenous mass extending to the optic canal. The mass was excised partially and was submitted for histologic and ultrastructural examination. Histologic testing revealed features of MFS with characteristic diffuse proliferation of atypical, spindle-shaped fibroblasts with prominent myxoid stroma. Tumor cells were reactive for vimentin. Ultrastructural examination revealed spindle-shaped tumor cells, rich in dilated rough endoplasmic reticulum and prominent vacuoles. For historical reasons, MFS involving the orbit is likely to be underrecognized and categorized erroneously as malignant fibrous histiocytoma or other soft tissue sarcoma. Although orbital MFS is an extremely rare diagnosis, ophthalmologists should be aware of the possibility and consider a diagnosis of MFS when an adult seeks treatment for an orbital tumor with aggressive growth.
    Ophthalmology 08/2008; 115(7):1237-1240.e2. · 5.56 Impact Factor
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    ABSTRACT: To identify the best combination of Stratus optical coherence tomography (OCT) retinal nerve fiber layer (RNFL) thickness parameters for the detection of glaucoma. Observational cross-sectional study. Eighty-nine age-matched normal and perimetric glaucoma participants enrolled in the Advanced Imaging for Glaucoma Study. The Zeiss Stratus OCT system was used to obtain the circumpapillary RNFL thickness in both eyes of each participant. Right and left eye clock-hour data are analyzed together, assuming mirror-image symmetry. The RNFL diagnostic parameters were combined using either or-logic or and-logic approaches. Area under the receiver operating characteristic curve (AROC), sensitivity, and specificity are used to evaluate diagnostic performance. Overall average RNFL thickness has the highest AROC value (0.89) of all single parameters evaluated, followed by the inferior and superior quadrants (0.88 and 0.86, respectively). The clock hours with the best AROC values are in the inferior and superior quadrants. The highest AROC (0.92) was achieved by the or-logic combination of overall, inferior, and superior quadrant RNFL thicknesses. The 3-parameter combination was significantly better than the overall average alone (P = 0.01). The addition of more quadrants or clock hours to the combination reduced diagnostic performance. The best stand-alone diagnostic strategy for Stratus OCT RNFL data is to classify an eye as glaucomatous if the overall, inferior quadrant, or superior quadrant RNFL thickness average is below normal.
    Ophthalmology 06/2008; 115(8):1352-7, 1357.e1-2. · 5.56 Impact Factor
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    ABSTRACT: The host inflammatory response to ocular infection with herpes simplex virus (HSV) can be either protective, with disease-free survival, or it can promote diseases such as HSV corneal disease (or herpes stromal keratitis [HSK] in humans) and encephalitis (HSE), depending on mouse strain. The role of CXCR3 chemokine signaling in HSV-induced central nervous system (CNS) inflammation and corneal disease was evaluated, and responses in genetically susceptible and resistant strains of mice were contrasted. Resistant C57BL/6J (B6) and susceptible 129S6 (129) mice were given monoclonal antibodies (mAbs) to neutralize the CXCR3 ligands monokine induced by interferon-gamma (MIG, CXCL9) and interferon inducible protein-10 (IP-10, CXCL10) during HSV infection. In addition, the development of HSV disease was monitored in CXCR3-null mutant mice derived from resistant (B6) and susceptible (BALB/c) strains. Inflammatory cells infiltrating the cornea and brain stem were isolated and stained for flow cytometric analysis. MIG and IP-10 were induced in nervous system tissue after HSV inoculation by the corneal route. HSV-infected 129 mice treated with MIG- or IP-10-neutralizing mAbs showed significantly enhanced survival compared with mice treated with control isotype antibody, whereas survival of the B6 mice was unaltered. Similarly, greater survival was observed for BALB.CXCR3(-/-) mice compared with control BALB/c mice. Reduced CNS inflammation was documented that extended to the cornea, such that HSV corneal disease severity was reduced in susceptible BALB.CXCR3(-/-). In contrast, although survival of B6 and B6.CXCR3(-/-) mice was indistinguishable, B6.CXCR3(-/-) mice developed more severe corneal and periocular skin disease. The effects of CXCR3 signaling in HSV infection are strongly dependent on mouse strain.
    Investigative Ophthalmology &amp Visual Science 10/2007; 48(9):4162-70. · 3.44 Impact Factor

Publication Stats

80 Citations
21.87 Total Impact Points

Institutions

  • 2008
    • University of Southern California
      • Doheny Eye Institute
      Los Angeles, CA, United States
  • 2007
    • University of California, Los Angeles
      • Department of Ophthalmology
      Los Angeles, California, United States