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RISS 인기검색어
- 검색키워드
- 저자 : Gwon O-Hyeon (검색결과 49 건)
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O-Hyeon Gwon,Tae Hoon Kong,Jaehong Key,Sejung Yang,Young Joon Seo 대한평형의학회 2022 Research in Vestibular Science Vol.21 No.1
Objectives: The aim of this study was to develop a filtering algorithm for raw nystagmus images and a diagnostic assistive algorithm using a principal component analysis (PCA) to distinguish the different types of benign paroxysmal positional vertigo (BPPV). Methods: Fifteen video clips of clinical data with typical nystagmus patterns of BPPV (13 cases) and with normal nystamgmus (two cases) were preprocessed when applied the thresholding, morphology operation, residual noise filtering, and center point extraction stages. We analyzed multiple data clusters in a single frame via a PCA; in addition, we statistically analyzed the horizontal and vertical com-ponents of the main vector among the multiple data clusters in the canalolithiasis of the lateral semicircular canal (LSCC) and the posterior semicircular canal (PSCC). Results: We obtained a clear imaginary pupil and data on the fast phases and slow phases after preprocessing the images. For a normal patient, a round shape of clustered dots was observed. Patients with LSCC showed an elongated hori-zontal shape, whereas patients with PSCC showed an oval shape at the (x, y) coordinates. The scalar values (mm) of the horizontal component of the main vector when performing a PCA between the LSCC- and PSCC-BPPV were sub-stantially different (102.08±20.11 vs. 32.36±12.52 mm, respectively; p=0.0012). Additionally, the salar ratio of horizontal to vertical components in LSCC and PSCC exhibited a significant difference (16.11±10.74 mm vs. 2.61±1.07 mm, respectively; p=0.0023). Conclusions: The data of a white simulated imaginary pupil without any back-ground noise can be a separate monitoring option, which can aid clinicians in determining the types of BPPV exhibited. Therefore, this analysis algorithm will provide assistive information for diagnosis of BPPV to clinicians.
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신현찬 ( Sin Hyeon Chan ),정철권 ( Jeong Cheol Gwon ),주장오 ( Ju Jang O ),김창운 ( Kim Chang Un ),엄상탁 ( Eom Sang Tag ),박경도 ( Park Gyeong Do ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.10
Primary carcinoma of the fallopian tube is the rarest cancer of the female genital tract with an incidence of 1% all gynecologic tumors Moreover, adenocarcinoma in situ of fallopian tube accounts for approximately 1% of primary fallopian tube cancer. Ovar
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