P-76: A Novel Overdriving Compression System with Low Cost and High Image Quality

2009 ◽  
Vol 40 (1) ◽  
pp. 1403
Author(s):  
Yue-Li Chao ◽  
Chien-Hung Chen
Keyword(s):  
Image Quality ◽  
Low Cost ◽  
High Image Quality ◽  
Compression System

scholarly journals Is a thin diameter ureteroscope feasible for image guided intravascular procedures?

2020 ◽  
Vol 6 (3) ◽  
pp. 591-594
Author(s):  
Axel Boese ◽  
Michael Friebe
Keyword(s):  
Blood Flow ◽  
Image Quality ◽  
Imaging System ◽  
Low Cost ◽  
Clinical Routine ◽  
High Image Quality ◽  
Image Guided ◽  
The Past ◽  
Long Time ◽  
Feasibility Test

AbstractVascular endoscopic imaging is known for a long time but has never made its way into clinical routine. Reasons for that are the complexity, lack of low-cost portable systems, and the lack of suitable endoscopes providing high image quality with small dimensions. In addition, an interruption of the blood flow caused by the device and the opacity of blood are difficult to manage. In the past we have already developed ideas to overcome these difficulties and now we present a feasibility test of a thin diameter ureteroscope for observation of vascular procedures. The imaging system was tested in a phantom where side branches were explored, a stent was placed and a simulated aneurysm coiled.

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Improving a DWT-based compression algorithm for high image-quality requirement of satellite images

2011 ◽  
Author(s):  
Carole Thiebaut ◽  
Christophe Latry ◽  
Roberto Camarero ◽  
Grégory Cazanave
Keyword(s):  
Image Quality ◽  
Satellite Images ◽  
Compression Algorithm ◽  
Quality Requirement ◽  
High Image Quality

Low Order Modeling for Fan and Outlet Guide Vanes in Aero-Engines

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Jiahuan Cui ◽  
Rob Watson ◽  
Yunfei Ma ◽  
Paul Tucker
Keyword(s):  
Detailed Analysis ◽  
Immersed Boundary Method ◽  
Low Cost ◽  
Immersed Boundary ◽  
Test Case ◽  
Guide Vanes ◽  
Compression System ◽  
Aero Engine ◽  
Aero Engines ◽  
Low Order

Intakes of reduced length have been proposed with the aim of producing aero-engines with higher efficiency and reduced weight. As the intake length decreases, it is expected that stronger effects of the fan on the flow over the intake lip will be seen. If the effects of the fan cannot be ignored, a low-cost but still accurate fan model is of great importance for designing a short-intake. In this paper, a low order rotor/stator model, the immersed boundary method with smeared geometry (IBMSG), has been further developed and validated on a rig test case. The improved IBMSG is more robust than the original. The rig test case used for validation features a low-pressure compression system with a nonaxisymmetric inflow, which is representative of the inlet condition of an aero-engine at its cruise condition. Both the fan and the outlet guide vanes (OGVs) are modeled using IBMSG. A detailed analysis is carried out on the flow both upstream and downstream of the fan. After validating the IBMSG method against the rig test case, a short-intake case, coupled with a fan designed for the next generation of aero-engines, is further investigated. It is found that compared with the intake-alone case, the inflow distortion at the fan face is significantly reduced by the presence of fan. Due to this increased interaction between the fan and the flow over the intake lip, accounting for the effects of the downstream fan is shown to be essential when designing a short intake.

High image quality type-II superlattice detector for 3.3 μm detection of volatile organic compounds

2015 ◽  
Vol 70 ◽  
pp. 34-39 ◽  
Author(s):  
Hedda Malm ◽  
Anders Gamfeldt ◽  
Rickard Marcks von Würtemberg ◽  
Dan Lantz ◽  
Carl Asplund ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Image Quality ◽  
Organic Compounds ◽  
Type Ii ◽  
High Image Quality ◽  
Type Ii Superlattice ◽  
Volatile Organic ◽  
Quality Type

scholarly journals Improving Fractal Image Compression Scheme through Quantization Operation

2007 ◽  
Vol 4 (2) ◽  
pp. 330-337
Author(s):  
Baghdad Science Journal
Keyword(s):  
Image Quality ◽  
Image Compression ◽  
New Method ◽  
Compression Scheme ◽  
Fractal Image Compression ◽  
High Image Quality ◽  
Fractal Image ◽  
Separate Step ◽  
Transform Coefficients

We explore the transform coefficients of fractal and exploit new method to improve the compression capabilities of these schemes. In most of the standard encoder/ decoder systems the quantization/ de-quantization managed as a separate step, here we introduce new way (method) to work (managed) simultaneously. Additional compression is achieved by this method with high image quality as you will see later.

scholarly journals Use of artisanal simulators in the ultrasound training for invasive procedures in nephrology: venous access and renal biopsy

2019 ◽  
Vol 41 (3) ◽  
pp. 423-426
Author(s):  
Marcus Gomes Bastos ◽  
Ramon de Oliveira Dalamura ◽  
Ana Luisa Silveira Vieira ◽  
José Pazeli Jr.
Keyword(s):  
Image Quality ◽  
Renal Biopsy ◽  
Low Cost ◽  
Venous Access ◽  
Chicken Breast ◽  
Invasive Procedures ◽  
Anatomical Structures ◽  
Pig Kidney ◽  
Hand Eye Coordination ◽  
Biopsy Methods

ABSTRACT Introduction: Vascular access and renal biopsy are common procedures in nephrology. In this study, two artisanal simulators of very low cost and excelent image quality are (prented) presented to guide, by ultrasound, the venous access and renal biopsy. Methods: The simulators are constructed using chicken breast slices, Penrose drain, plastic milk shake straw and pig kidney. Results: Both simulators enable immediate identification of the anatomical structures of interest, vessels and kidney, and enable spatial orientation and hand-eye coordination, essential for the development of the necessary skills to safely carry out invasive procedures. Conclusion: The simulators described, were extremely useful for simulating venous access and renal biopsy guided by ultrasonography, enabling training to reduce the failure rate in punctures and the potential complications associated with the described procedures.

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