Calibration of 3D imaging system based on multi-line structured-light

Author(s):  
lihong Niu ◽  
binghua Su ◽  
yushun Sun ◽  
jinyuan Liu ◽  
yi Zou
2002 ◽  
Author(s):  
Yuan-Hao Yeh ◽  
I-Cheng Chang ◽  
Ching-Long Huang ◽  
Wen-Jean Hsueh ◽  
Hsien-Chang Lin ◽  
...  

Author(s):  
D.V. Chernykh ◽  

The purpose of the study was to evaluate the effectiveness of bimanual surgery with anti-VEGF preparation of patients with severe forms of PDR complicated by traction retinal detachment, with intraoperative use of 3D visualization. Material and methods. Operated on 18 patients with a diagnosis of PDR complicated by traction retinal detachment. Of these, there were 7 patients with type 1 diabetes, type 2 diabetes. There were 5 men and 13 women. The average age was 58 + -2 years. All patients underwent a three-port vitrectomy, using an additional light source, with preoperative preparation with anti-VEGF drugs, using bimanual technique and 3D visualization, using air tamponade. Results and its discussion. As a result of the study, it was found that the visual acuity before the treatment was 0.03 [0.01; 0.1], and 4-6 months after the surgical treatment, 0.3 [0.15; 0.5]. The performed statistical analysis made it possible to establish a statistically significant increase in visual acuity 4-6 months after the treatment. (p = 0.001) Achieved complete anatomical retinal fit. With increased visual acuity. There were 5 complications in the postoperative period. Recurrent hemophthalmos was diagnosed in 3 people, which required repeated surgical intervention. In 2 patients in the postoperative period, DMO developed, which required IVI biodegradable dexamethasone implant. Conclusion. Bimanual, surgical treatment of traction retinal detachments, in severe forms of PDLP, with preoperative preparation with anti-VEGF drugs, and the use of the Ngenuity ALCON 3D imaging system, is one of the effective methods of treatment in this group of patients, and is aimed at reducing both intra and postoperative complications. Key words: рroliferative diabetic retinopathy, vitrectomy, 3D imaging, bimanual surgery, anti-VEGF drugs.


Author(s):  
S. Kolokytha ◽  
R. Speller ◽  
S. Robson

This study describes a cost-effective check-in baggage screening system, based on "on-belt tomosynthesis" (ObT) and close-range photogrammetry, that is designed to address the limitations of the most common system used, conventional projection radiography. The latter's limitations can lead to loss of information and an increase in baggage handling time, as baggage is manually searched or screened with more advanced systems. This project proposes a system that overcomes such limitations creating a cost-effective automated pseudo-3D imaging system, by combining x-ray and optical imaging to form digital tomograms. Tomographic reconstruction requires a knowledge of the change in geometry between multiple x-ray views of a common object. This is uniquely achieved using a close range photogrammetric system based on a small network of web-cameras. This paper presents the recent developments of the ObT system and describes recent findings of the photogrammetric system implementation. Based on these positive results, future work on the advancement of the ObT system as a cost-effective pseudo-3D imaging of hold baggage for airport security is proposed.


2001 ◽  
Vol 15 (1) ◽  
pp. 35-40
Author(s):  
Toshiaki Kodera ◽  
Toshihiko Kubota ◽  
Masanori Kabuto ◽  
Yuji Handa ◽  
Hisamasa Ishii ◽  
...  

2014 ◽  
Vol 28 (S1) ◽  
Author(s):  
Kang Zhang ◽  
Jolene Zheng ◽  
Chenfei Gao ◽  
Diana Thomas ◽  
Xin Li ◽  
...  

Author(s):  
M. J. Chae ◽  
H. S. Yoo ◽  
J. R. Kim ◽  
M. Y. Cho ◽  
J. H. Jang ◽  
...  
Keyword(s):  

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