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FTV (Free-viewpoint Television) and its International Standardization
Masayuki Tanimoto 대한전자공학회 2017 IEIE Transactions on Smart Processing & Computing Vol.6 No.6
Free-viewpoint television (FTV) is the ultimate three-dimensional TV (3DTV) with an infinite number of views, and it ranks at the top of visual media. FTV enables users to view a 3D scene by freely changing the viewpoint, as we do naturally in the real world. FTV is a natural interface between humans and the environment. It is also an immersive medium that enables a realistic virtual reality (VR) experience and revolutionizes 3D viewing. FTV was realized by developing novel ray capture, processing, and display technologies and is based on ray-space representation. The international standardization of FTV has been conducted by the Moving Picture Experts Group (MPEG). The first phase of FTV is multiview video coding (MVC), and the second phase is 3D video (3DV). The third phase of FTV is MPEG-FTV, which targets revolutionized viewing of 3D scenes via super multiview, free navigation, and 360-degree 3D. After the success of Exploration Experiments and Call for Evidence, MPEG-FTV moved MPEG Immersive project (MPEG-I), and has been in charge of its video part as MPEG-I Visual. MPEG-I will create standards for immersive services based on the stages of immersion. In this paper, FTV and its international standardization are reviewed.
Clinical investigation of patients with jaw deformity with comorbidities
Kiyohiro Kasahara,Teruhide Hoshino,Kei Sugiura,Yuki Tanimoto,Masahide Koyachi,Masae Yamamoto,Keisuke Sugahara,Masayuki Takano,Akira Katakura 대한악안면성형재건외과학회 2022 Maxillofacial Plastic Reconstructive Surgery Vol.44 No.-
Background: With improvements in the safety and stability of surgeries, the number of orthognathic surgeries isincreasing. Most patients who undergo orthognathic surgeries are younger, and the number of orthognathic surgeriesfor patients with comorbidities is also increasing. We report a survey and clinical investigation of patients withcomorbidities who underwent orthognathic surgeries at our department to improve the safety of orthognathicsurgery. Results: The participants included 296 men and 712 women, with a mean age of 28 years (13?19 years, n=144;20?29 years, n=483; 30?39 years, n=236; 40?49 years, n=102; 50?59 years, n=39; ≥60 years, n=4). In total, 347patients underwent one-stage Le Fort type I osteotomy and sagittal split ramus osteotomy (SSRO), 243 underwentSSRO, 287 underwent plate removal, 126 underwent genioplasty and plate removal, and five underwent othersurgeries. In total, 529 patients had comorbidities (52%), including allergic diseases (n=220, 33%), respiratory diseases(n=107, 16%), neurologic and psychiatric diseases (n=69, 10%), gynecologic diseases (n=28, 4%), hematologicdiseases (n=27, 4%), cardiovascular diseases (n=24, 4%), digestive diseases (n=22, 3%), metabolic and endocrinediseases (n=18, 3%), spinal diseases (n=11, 2%), ophthalmologic diseases (n=11, 2%), renal and urological diseases(n=9, 1%), and other diseases (n=117, 18%). Among the patients with comorbidities, 11 with hemorrhagic diatheses(hemophilia and von Willebrand disease), arrhythmia (atrioventricular block), psychiatric disease (adjustment disorder),and metabolic disease (diabetes) required cautious perioperative management. The patient with hemophilia wasmanaged with regular low-dose recombinant factor VIII replacement therapy, and the patient with type I diabetesmellitus was administered continuous insulin infusion and sliding-scale insulin therapy; both patients had an uneventfulcourse. Conclusions: The study findings suggest that with the increase in orthognathic surgeries, oral and maxillofacialsurgeons should adequately manage cases requiring cautious perioperative control and highlight the importance ofpreoperative screening. Despite the well-established safety and postoperative stability of orthognathic surgeries, oralsurgeons should adopt appropriate additional preventive measures for patients with comorbidities.