Doug Forsyth

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A system is described which automatically identifies cephalometric landmarks on digital cephalometric radiographs. The accuracy of the automated system in identifying nineteen cephalometric landmarks is assessed. The accuracy obtained with the automated system is less than that of manual tracing. The automated system has particular difficulty in identifying(More)
In modern orthodontic practice great reliance is placed on systematic and objective methods of characterizing craniofacial forms, using measurements based on both hard and soft tissue landmarks. Lateral skull X-ray images are routinely used in cephalometric analysis to provide quantitative measurements useful to clinical orthodontists. It is argued that a(More)
The aim of this study was to compare the diagnostic quality of conventional cephalometric radiographs with that of digital image counterparts. The random error associated with angular and linear measurements recorded on the digital images was greater than on the conventional radiographs. In addition, there was a systematic error producing statistically(More)
The U.S. government operates seven radar networks providing weather and aircraft surveillance for public weather services, air traffic control, and homeland defense. A next-generation, multifunction-phased-arrayradar (MPAR) concept has been proposed that could provide enhanced weather and aircraft surveillance services with potentially lower life-cycle(More)
Digital imaging has several potential advantages over traditional cephalometry. These include storage, transmission, and enhancement of images, reduced exposure to radiation for patients, and the possibility of automated cephalometric analysis. This paper outlines some of these advantages, discusses the limitations of digital imaging and suggests possible(More)
Absolute Standards, Inc. 245A 6/95 3 Air Instruments & Measurements 379A 8/95 103 Air Products 277A 6/95 109 Bomem 277A 6/95 101 Bruker 336A 7/95 106 Cambridge Isotope Laboratories 276A 6/95 7 CEA Instruments 336A 7/95 108 CETAC Technologies 336A 7/95 105 CETAC Technologies 379A 8/95 104 Chromatography Research Supplies 379A 8/95 109 Deutsche Messe(More)
Absolute Standards, Inc. 245A 6/95 3 203-281-2917 203-281-2922 Jack Criscio Air Products 277A 6/95 109 800-752-1597 Jennifer Castello ATI Orion 228A 5/95 118,119, 123 800-225-1480 617-242-8594 David Ingalls Applied Separations 228A 5/95 116 610-770-0900 610-740-5520 Carolyn Katwan Bomem 277A 6/95 101 203-668-7226 Dana Kelley Bruker 228A 5/95 111(More)
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