Results 251 to 260 of about 65,854 (286)
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Illuminator for Subtraction Technique
Radiology, 1971The authors describe a simple, inexpensive illuminator for use with the subtraction technique and in film duplication.
Tom A. Kendig, Albert. Hood
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Image Subtraction Techniques in Immunoscintigraphy [PDF]
International Journal of Radiation Applications and Instrumentation. Part B. Nuclear Medicine and Biology, 1986 This paper is devoted to the application of the Image Subtraction Technique to immunoscintigraphy. It is technical, because, although based on simple principles, this method raises problems which are not always satisfactorily solved. It is divided into three parts.
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Modified Subtraction Technique for Neuroradiology
Radiology, 1973The authors suggest modifying the standard subtraction technique for use in neuroradiology by using the most informative film in the venous phase as the mask. The anatomical relationships between arteries and veins are shown on one film, while the effect of space-occupying lesions is accentuated using this technique.
Tim B. Hunter, Inkyu Lee
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Improved Contrast in Subtraction Technique
Radiology, 1970The authors describe a rapid, reliable method of second-order subtraction in which contrast is improved by the addition of a final exposure on high-contrast photographic film. Such films readily lend themselves to copying for slides and publications, with negligible cost of materials.
Perry D. Scott +4 more
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Subtraction Radiography: Techniques and Limitations
Radiology, 1977Subtraction radiography permits the use of 7-10 times less contrast material than is required without subtraction techniques. The first-order, second-order, and composite mask techniques are described and evaluated. While the second-order technique gives more complete cancellation of common structures, the more commonly used first-order technique was ...
Earle C. Gregg +2 more
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A subtraction technique in conventional angiography.
Radiology, 1984A subtraction technique is described for conventional angiography by which a superimposed vessel can be removed, allowing exact visualization of the area in question. The method is easy, requires only standard subtraction apparatus, and obviates the need for additional contrast material injections.
Ryvicker Mj +3 more
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Contact screen image subtraction technique
Applied Optics, 1981Experimental results have clearly demonstrated that the newly proposed optical contact screen pulse-width modulation image subtraction technique can be used for the evaluation both qualitative and quantitative of the subtle differences between two similar images.
Hua-Kuang Liu +2 more
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Newer Subtraction and Filtration Techniques
Radiologic Clinics of North America, 1985This article attempts to describe and superficially evaluate the present and future application of a number of newer subtraction techniques, including recursive temporal filtration, matched filtration, hybrid subtraction, tomography and tomosynthesis, and parametric imaging and image processing.
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A digital subtraction technique for dental radiography
Oral Surgery, Oral Medicine, Oral Pathology, 1983The relative accessibility and stability of the teeth facilitate generation of geometrically identical radiographs over a period of time. When such radiographs are digitized with the aid of a TV camera coupled to an analog to digital converter and a computer, it is possible to conveniently produce subtraction images of high diagnostic value.
Richard L. Webber +2 more
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