¿Es posible incrementar la sensibilidad diagnóstica de una radiografía?
Introduction. The qualities that digital x-rays possess, and which analog x-ray lack, are unquestionable. In an effort to obtain analogic x-rays that have the same qualities, wehave implemented a technique that uses the photographic process and digital processing of images. Using them individually o...
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | español |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/2126 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2126 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Radiografías planas/Flat x-rays info:eu-repo/classification/Fotografía/Photography info:eu-repo/classification/Procesado digital de imágenes/Digital image processing info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2209 |
| Sumario: | Introduction. The qualities that digital x-rays possess, and which analog x-ray lack, are unquestionable. In an effort to obtain analogic x-rays that have the same qualities, wehave implemented a technique that uses the photographic process and digital processing of images. Using them individually or simultaneously, depending on the problem, we have found that sensitivity can be increased to the point where it is possible to view details that would be difficult to see otherwise. At times high resolution is also needed, and thus far we have achieved 10 microns; however, that value can be improved in the near future usingh igher resolution detectors. We show theresults of applying the technique in four cases. Material and methods. The x-rays were photographed using a CCD (charge coupled device) camera and a fixed focal distance lens. Controlling the diameter of the diaphragm, we obtained contrasted images even when the x-ray is dark or bright. Changing the distance between the camera and the x-ray we controlled the size of the photographed area. The pixel size of the CCD camera is 3 microns and the size of the digitalized images is 3000 × 2200 pixels. The maximum resolution obtained is 10 microns for an x-ray area of 30 × 25 mm. To show some of the advantages of the technique, four cases were analyzed: rheumatoid arthritis, osteopenia, breast cancer, and calcifications. |
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