Search results for "digital imaging"

showing 3 items of 23 documents

Requirements on resolution of digital imaging equipment in the cardiac catheterization laboratory.

1988

We evaluated the requirements on spatial resolution of digital imaging equipment in the cardiac catheterization laboratory. Fifty cinefilms of the heart as the biological object and one film of a lead-ladder-pattern as an objective test were used. The patient films were examined for the visibility of the left ventricular angiogram, coronary arterial tree, coronary artery lesions, branching of septal arteries and the number of septal arteries. All films were viewed three times: with a 625 line TV-system, with a 1249 line TV-system and with a cineprojector. It was found that two application areas with different demands on the spatial and temporal resolution can be distinguished: 1) low spatia…

medicine.medical_specialtyCardiac CatheterizationCoronary arterial treebusiness.industrymedicine.medical_treatmentDigital imagingAngiographyCoronary AngiographyRadiographic Image Enhancementmedicine.anatomical_structureApplication areasTemporal resolutionmedicineCineangiographyHumansRadiology Nuclear Medicine and imagingTelevisionRadiologyCardiology and Cardiovascular MedicinebusinessImage resolutionCardiac imagingCardiac catheterizationArteryInternational journal of cardiac imaging
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Skin chromophore mapping by modified video-microscope

2013

Possibilities to map skin chromophores using a modified low-cost digital video-microscope is discussed. The device comprises CMOS digital imaging sensor, four-colour LED illumination system and image acquisition optics. The main goal is to obtain a set of spectral images of the skin area of interest for further conversion into maps of the main skin chromophores

medicine.medical_specialtyMicroscopeComputer sciencebusiness.industryMultispectral imageComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONDigital imagingImage processingPolarizerlaw.inventionSpectral imagingLED lampOpticslawmedicinebusinessCMYK color model
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Skin chromphore mapping by means of a modified video-microscope for skin malformation diagnosis

2013

Many spectral imaging devices are commercially available and used to detect certain skin pathology; however an alternative cost-efficient device can provide an advanced spectral analisys of skin. Multispectral device for diagnosis of pigmented skin lesions was developed and tested. Possibilities to map skin chromophores using a modified low-cost digital video-microscope is discussed. It was adapted for an advanced skin microscopy and used for detailed spectral analysis of skin. The device comprises CMOS digital imaging sensor, four-colour LED illumination system and image acquisition optics. The main goal is to obtain a set of spectral images of the skin area of interest for further convers…

medicine.medical_specialtyMicroscopeintegumentary systemComputer sciencebusiness.industryMultispectral imageDigital imagingImage processingChromophoreSpectral imaginglaw.inventionlawMicroscopymedicineComputer visionArtificial intelligencePigmented skinbusinessSkin pathologySPIE Proceedings
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