scholarly journals Web-based psychometric evaluation of image quality

2009 ◽  
Author(s):  
Iris Sprow ◽  
Zofia Baranczuk ◽  
Tobias Stamm ◽  
Peter Zolliker
Keyword(s):  
Image Quality ◽  
Psychometric Evaluation ◽  
Web Based

Inexpensive, realtime tele-ultrasound using a commercial, web-based video streaming device

2012 ◽  
Vol 18 (4) ◽  
pp. 185-188 ◽  
Author(s):  
Yannis M Paulus ◽  
Noel P Thompson
Keyword(s):  
Image Quality ◽  
Video Streaming ◽  
Delay Time ◽  
Qualitative Assessment ◽  
Web Based ◽  
Grey Scale ◽  
Standard Resolution ◽  
Ultrasound System

We have devised an inexpensive, web-based tele-ultrasound system using commercially-available video streaming equipment. We examined the spatial and grey scale resolution, and the delay time of the system. The receiving PC was tested at various distances from the transmitting site, from 3.2 km to 4828 km. Standard resolution targets and echocardiography movie strips recorded on DVDs were used to assess the image quality. A qualitative assessment was made by an expert sonographer. As the distance between the transmitter and the receiver increased, the scan smoothness decreased and the delay increased. At a distance of 3.2 km the delay was 2–3 s, and at 4828 km it was 10–15 s. The delay was short enough to allow realtime guidance of the scanning technician by telephone. The system allows inexpensive, readily available, realtime tele-ultrasonography.

Using a Web-Based Image Quality Assurance Reporting System to Improve Image Quality

2013 ◽  
Vol 201 (2) ◽  
pp. 361-368 ◽  
Author(s):  
Gregory J. Czuczman ◽  
Stuart R. Pomerantz ◽  
Tarik K. Alkasab ◽  
Ambrose J. Huang
Keyword(s):  
Quality Assurance ◽  
Image Quality ◽  
Reporting System ◽  
Web Based ◽  
Improve Image Quality

scholarly journals Instrument translation and initial psychometric evaluation of the Danish Body Image Quality of Life Inventory

2016 ◽  
Vol 30 (4) ◽  
pp. 830-844 ◽  
Author(s):  
Trine Bernholdt Rasmussen ◽  
Selina Kikkenborg Berg ◽  
Jane Dixon ◽  
Philip Moons ◽  
Hanne Konradsen
Keyword(s):  
Quality Of Life ◽  
Body Image ◽  
Image Quality ◽  
Psychometric Evaluation ◽  
Instrument Translation ◽  
Quality Of Life Inventory ◽  
Life Inventory

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.

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