Search results for " Spiral Computed"

showing 3 items of 23 documents

Introduction to coronary imaging with 64-slice computed tomography

2005

The aim of this article is to illustrate the main technical improvements in the last generation of 64-row CT scanners and the possible applications in coronary angiography. In particular, we describe the new physical components (X-ray tube-detectors system) and the general scan and reconstruction parameters. We then define the scan protocols for coronary angiography with the new generation of 64-row CT scanners to enable radiologists to perform a CT study on the basis of the diagnostic possibilities.

Time FactorsImaging Sensitivity and Specificity Stents Time Factors TomographyContrast MediaSensitivity and Specificity64-row CTElectrocardiographyHeart RateSpiral Computed TomographyImage Processing Computer-AssistedHumanstechnical improvementsCoronary Artery BypassPhantoms ImagingPatient SelectionAlgorithms Artifacts Contrast Media Coronary Angiography/instrumentation/*methods Coronary Artery Bypass Coronary Stenosis/*radiography Electrocardiography Heart Rate Humans Image Processing; Computer-Assisted Patient Selection Phantoms; Imaging Sensitivity and Specificity Stents Time Factors Tomography; Spiral Computed Tomography; X-Ray Computed/instrumentation/*methodsCoronary StenosisComputer-Assisted Patient Selection PhantomsX-Ray Computed/instrumentation/*methodstechnical improvements; 64-row CT; coronary angiographyComputer-Assisted Patient Selection PhantomStentsAlgorithms Artifacts Contrast Media Coronary Angiography/instrumentation/*methods Coronary Artery Bypass Coronary Stenosis/*radiography Electrocardiography Heart Rate Humans Image Processingcoronary angiographyArtifactsTomography X-Ray ComputedTomography Spiral ComputedAlgorithms
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Prevalence and morphometric analysis of the retromolar canal in a Spanish population sample: a helical CT scan study.

2021

BACKGROUND: The retromolar canal (RMC) is an anatomical variation of the mandibular canal (MC) whose identification and study should be considered given its implication in the surgical procedures of the retromolar area. The prevalence of the RMC widely varies according to previous studies and may be influenced by the followed study method. This work aimed to evaluate the prevalence of the RMC in a Spanish population sample. MATERIAL AND METHODS: For this purpose, 225 CT scan images (with a higher resolution than the cone beam CT used in other previous studies) from the Hospital Clinico Universitario de Valencia were analyzed. The Osirix MD radiological image analysis system was applied to a…

locoregional recurrencehpv-16Mandibular canalMandiblesurvivaldisease progressionmedicinePrevalenceHumanshuman papillomavirusGeneral DentistryCone beam ctUNESCO:CIENCIAS MÉDICASOrthodonticshpvbusiness.industryAnatomic VariationSurgical proceduresCone-Beam Computed Tomographyoral cancerHelical ctClinical PracticeSpanish populationoral squamous cell carcinomamedicine.anatomical_structureOtorhinolaryngologyMorphometric analysisRadiological weaponSurgerybusinessTomography Spiral Computed
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Automatic detection of lung nodules in CT datasets based on stable 3D mass–spring models

2012

We propose a computer-aided detection (CAD) system which can detect small-sized (from 3 mm) pulmonary nodules in spiral CT scans. A pulmonary nodule is a small lesion in the lungs, round-shaped (parenchymal nodule) or worm-shaped (juxtapleural nodule). Both kinds of lesions have a radio-density greater than lung parenchyma, thus appearing white on the images. Lung nodules might indicate a lung cancer and their early stage detection arguably improves the patient survival rate. CT is considered to be the most accurate imaging modality for nodule detection. However, the large amount of data per examination makes the full analysis difficult, leading to omission of nodules by the radiologist. We…

medicine.medical_specialtyLung NeoplasmsDatabases FactualHealth InformaticsCADModels BiologicalSensitivity and SpecificityImaging Three-DimensionalSegmentationLung nodulemedicineFalse positive paradoxSegmentation; Lung nodules; Active contours models;Computer tomography (CT); Mass–spring models; Spline curves; Image featuresHumansSegmentationDiagnosis Computer-AssistedStage (cooking)Lung cancerComputer tomography (CT)business.industryNodule (medicine)Image featuresSpline curvemedicine.diseaseSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)Computer Science ApplicationsRegion growingMass–spring modelRadiologyTomographymedicine.symptombusinessTomography Spiral ComputedAlgorithmsActive contours model
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