Dr. Hans N. Roehrig
Research Professor Emeritus of Radiology at Univ of Arizona
SPIE Involvement:
Fellow status | Conference Chair | Editor | Author | Instructor
Publications (119)

SPIE Conference Volume | September 22, 2015

SPIE Conference Volume | September 18, 2014

PROCEEDINGS ARTICLE | September 12, 2014
Proc. SPIE. 9214, Medical Applications of Radiation Detectors IV
KEYWORDS: Optical filters, Edge detection, Visualization, Image segmentation, Image processing, Image quality, Gaussian filters, Telemedicine, Data communications, Fuzzy logic

PROCEEDINGS ARTICLE | September 5, 2014
Proc. SPIE. 9186, Fifty Years of Optical Sciences at The University of Arizona
KEYWORDS: Medicine, Radio optics, Optics, Video, X-rays, Computing systems, Diagnostics, Angiography, Spatial resolution, Radiology

SPIE Conference Volume | October 8, 2013

PROCEEDINGS ARTICLE | September 26, 2013
Proc. SPIE. 8853, Medical Applications of Radiation Detectors III
KEYWORDS: Infrared imaging, Digital signal processing, Image compression, Image restoration, Image acquisition, Medical imaging, Digital imaging, Mammography, High dynamic range imaging, Compressed sensing

Showing 5 of 119 publications
Conference Committee Involvement (17)
Medical Applications of Radiation Detectors V
13 August 2015 | San Diego, California, United States
Medical Applications of Radiation Detectors IV
19 August 2014 | San Diego, California, United States
Medical Applications of Radiation Detectors III
29 August 2013 | San Diego, California, United States
Medical Applications of Radiation Detectors II
16 August 2012 | San Diego, California, United States
Medical Applications of Radiation Detectors
25 August 2011 | San Diego, California, United States
Showing 5 of 17 published special sections
Course Instructor
SC883: Consistent Color and Grayscale Presentation for Medical Color Displays
This course provides you with a basic working knowledge of color and color calibration. The course concentrates on consistent color and consistent grayscale presentation for the increasingly used color displays in medical imaging replacing the traditional monochrome displays. There will be four main subject areas: • The science of color and color measurements. Here you will learn about the tri-chromatic theory, the color-matching functions, the tristimulus values, the chromaticity coordinates and the various color spaces. Of particular importance for the measurement of color are the colorimeter and the spectro-photometer. • Computational tools for calibration and color reproduction. In this section you will be exposed to a typical system consisting of a colorimeter and a color display with an image for measuring color coordinates of that image, or a color camera for capturing the image of a color display like a color LCD. You learn that you need to do an input calibration, processing and an output calibration. • Assessment of display performance for medical imaging systems. In this section you will be reminded of the AAPM Task Group 18 and its efforts to establish performance criteria recommending minimum performance requirements for safe utilization of electronic monochrome displays in medical applications. You will learn that such efforts will also be required for color displays. • Visual thresholds and the effect of color on the correct diagnosis. In this section you will hear about some of the areas in medical imaging in which the importance of color images and color displays have been explored. Emphasis will be on radiologic imaging, but examples from other areas such as pathology and dermatology where true color images are used will also be referenced. Ultimately the objective of this course is to familiarize you with the elements of consistent color presentation as well as consistent grayscale presentation of medical images on digital color displays for medical image interpretation.
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