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Dongwhan Suh,지종훈,Kirtan Tankshali,Eung-Sic Kim 대한견주관절학회 2019 대한견주관절학회지 Vol.22 No.4
Background: This retrospective study was undertaken to evaluate mid-term clinical and radiological outcomes of lattisimus dorsi (LD) tendon transfer in patients with irreparable massive rotator cuff tears (MRCT). We hypothesize that LD tendon transfer would provide safe and satisfactory clinical outcomes at mid-term follow-up. Methods: From November 2008 to December 2016, 23 patients (57.5 ± 4.4 years; 20 male, 3 female) who underwent LD tendon transfer for massive tears, were enrolled. Inclusion criteria were irreparable MRCT. Exclusion criteria included full thickness subscapularis tear, rotator cuff arthropathy, anterosuperior rotator cuff tear, and osteoarthritis. Mean follow-up period was 4.7 ± 4.0 years (range, 2–12 years). Clinical assessment (American Shoulder and Elbow Surgeons [ASES], University of California, Los Angeles [UCLA], Simple Shoulder Test [SST]) and radiographic assessment (osteoarthritis [OA], acromiohumeral distance [AHI]) were evaluated. Results: ASES, UCLA and SST scores, and range of motion (ROM), except internal rotation, improved significantly at the last follow-up (p<0.05). Also, AHI was significantly improved at the last follow-up, from 6.6 mm to 8.2 mm (p=0.008). At the final follow-up, the radiologic stages of the glenohumeral osteoarthritis were determined as stage 1 in 9 patients, stage 2 in 10 patients, stage 3 in 2 patients, and stage 4 in 2 patients. Complications were observed in 21.7% cases: 3 re-tears and 2 infections were noted in our study. Conclusions: LD tendon transfer for irreparable MRCT provides satisfactory clinical outcomes at mid-term follow-up. Mild degenerative osteoarthritis (stage 1, 2) of the shoulder joint are common at the mid-term follow-up. Also, complications such as tear, infection should be considered.
Dot Grid와 카메라 영상 오차 보정 알고리즘을 이용한 이차 전지 전극 Alignment 정밀 검사
배일진(Il-Jin Bae),박현종(Hyeon-Jong Park),황보원(Bo-Won Hwang),김민식(Min-Sic Kim),지범수(Bum-Soo Ji),이응석(Eung-Suk Lee) 한국생산제조학회 2021 한국생산제조학회지 Vol.30 No.3
Industrial cameras used in traditional machine vision are subject to errors because of the distortions induced in the images due to the camera lenses and various external factors. To calibrate these errors, a picture of the dot grid was taken and the center of the circle was calculated using the least squares circle-fitting method and the centroid method. In addition, an error map was generated using these methods, which can be used for generating a first-order equation with the least squares method. It is possible to calibrate the object point. In this work, an equation that can correct this error and perform an accurate measurement. It was applied to the stacking equipment of secondary batteries for automobiles to an algorithm that accurately measures the alignment of the cathode and the anode.