High-precision diameter detector and three-dimensional reconstruction method for oil and gas pipelines

2018 ◽  
Vol 165 ◽  
pp. 842-849 ◽  
Author(s):  
Yan Shi ◽  
Liming Hao ◽  
Maolin Cai ◽  
Yixuan Wang ◽  
Jing Yao ◽  
...  
1995 ◽  
Vol 39 (6) ◽  
pp. 995-1003 ◽  
Author(s):  
Naotsugu Kawahata ◽  
Hideki Ono ◽  
Akihiko Otsuka ◽  
Tomomi Fukunaga ◽  
Yuji Kamashita ◽  
...  

2013 ◽  
Vol 1 (5) ◽  
pp. 321-327 ◽  
Author(s):  
Aurélien Courvoisier ◽  
Brice Ilharreborde ◽  
Barbara Constantinou ◽  
Benjamin Aubert ◽  
Raphael Vialle ◽  
...  

1989 ◽  
Vol 101 (5) ◽  
pp. 517-521 ◽  
Author(s):  
Haruo Takahashi ◽  
Akira Takagi ◽  
Isamu Sando

This study was performed to clarify the complex three-dimensional shape of the round window and its membrane, and to measure these structures by using the computer-aided three-dimensional reconstruction method we developed. The equipment used included a personal computer, a high-resolution, 14-Inch color monitor, and a digitizer. Materials consisted of five normal temporal bones obtained from five individuals with negative otologic histories who had been 5 months and 14, 15, 18, and 59 years old at death. Round window membranes were found to be convex to the middle ear side when viewed in the coronal plane, but to be concave when viewed in the sagittal plane; thus the membrane in most cases seemed to be shaped like a saddle, tapered toward the vestibular end. The average maximal diameter, sagittal length, horizontal width, and surface area of the round window were 2.32 ± 0.19 mm, 2.08 ± 0.22 mm, 1.76 ± 0.10 mm, and 2.70 ± 0.43 mm2, respectively. The average surface area of the round window membrane was 2.98 ± 0.43 mm2.


1998 ◽  
Vol 107 (7) ◽  
pp. 547-554 ◽  
Author(s):  
Masaharu Sudo ◽  
Isamu Sando ◽  
Chiaki Suzuki

Histologic sections from nine temporal bones with eustachian tubes (ETs) attached were analyzed with a computer-aided three-dimensional reconstruction method to determine the curvature and tilt of the ET and the anatomic relationships between the medial lamina of the ET cartilage, the levator veli palatini muscle (LVPM), and Rosenmüller's fossa. It was found that the ET is convex superomedially and is tilted medially. The LVPM is located inferolateral to the inferior margin of the medial lamina of the anterior ET cartilage. The LVPM is inferior to the medial lamina of the posterior ET cartilage. These findings suggest that the LVPM opens the anterior cartilaginous portion of the ET by rotating the medial lamina with increased dimension of the muscle body when it contracts. Rosenmüller's fossa extends along the ET with rich lymphoid tissues as far as approximately one half the total length of the ET and very close to the skull base.


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