Search results for "Multidetector CT"

showing 10 items of 14 documents

Hepatic mesenchymal hamartoma in a preterm newborn: demonstration by low-dose multidetector CT.

2007

Primary liver tumours are very rare in the neonatal period. Differential diagnoses include haemangioendothelioma, malignant hepatoblastoma and mesenchymal hamartoma. Due to non-specific clinical symptoms and indecisive imaging findings, correct diagnosis may be difficult to establish. We report a female preterm newborn who was delivered at 33 weeks of gestation and in whom ultrasonography (US) revealed a large cystic intraabdominal tumour of unknown origin. For further evaluation, contrast-enhanced multidetector computed tomography (CT) was performed on the 4th day of life using a low-dose protocol (80 kVp, 50 mAs, collimation 0.75 mm, total effective dose 3.6 mSv). Based on CT findings, di…

medicine.medical_specialtyPregnancyHepatoblastomabusiness.industryHamartomaLiver DiseasesMesenchymal stem cellLiver NeoplasmsInfant NewbornGeneral MedicineMultidetector ctmedicine.diseaseEffective dose (radiation)MesodermPediatrics Perinatology and Child HealthmedicineGestationHamartomaHumansFemaleRadiologyMedical diagnosisbusinessInfant PrematureTomography Emission-ComputedActa paediatrica (Oslo, Norway : 1992)
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Quantitative structural analysis of trabecular alveolar bone in the mandible by multidetector computed tomography: Differences according to tooth pre…

2019

Background and objective: There is a lack of quantitative measures of the quality of alveolar trabecular bone, an important factor in implantology. This study aimed to develop a method of objectively assessing the quality of trabecular bone by means of image processing and structural analysis of multidetector computed tomography images and to establish differences between tooth types and tooth presence/absence. Materials and methods: We analyzed 20 patients who underwent multidetector computed tomography to evaluate mandibular bone and tooth positioning. Image analysis included automatic segmentation of the mandible, obtainment of sections perpendicular to the dental arch, and structural an…

Trabecular boneMolarmedicine.medical_treatmentMandible030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicinestomatognathic systemHounsfield scaleMultidetector computed tomographymedicineQuantitative analysisDental implantDental alveolusGeneral Environmental ScienceOrthodonticsTooth presencebusiness.industryMultidetector CTDental implantsMandible030206 dentistrystomatognathic diseasesDental archmedicine.anatomical_structureGeneral Earth and Planetary SciencesbusinessRadiología (English Edition)
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ECG-GATED MULTIDETECTOR COMPUTED TOMOGRAPHY FOR THE ASSESSMENT OF THE POSTOPERATIVE ASCENDING AORTA

2009

This study was undertaken to define the role of electrocardiographically (ECG)-gated multidetector computed tomography (MDCT) in the assessment of the postoperative ascending aorta. From November 2006 to June 2007, 21 patients, [11 men, ten women; age +/- standard deviation (SD): 62.7 +/- 10.8 years] with a history of ascending aorta replacement underwent ECG-gated MDCT and were prospectively included in our study. Ascending aorta replacement had been performed with different surgical techniques: Bentall-De Bono (four patients, 19%), Tirone-David (five patients, 23%), and modified Tirone-David with creation of aortic neosinuses (12 patients, 57%). Two patients were excluded from MDCT evalua…

Malemedicine.medical_specialtyAortic DiseasesContrast MediaAorta ThoracicBlood Vessel Prosthesis ImplantationElectrocardiographyPostoperative ComplicationsAortic valve replacementECG gatingmedicine.arteryAscending aortaMultidetector computed tomographymedicineHumansRadiology Nuclear Medicine and imagingAortic valve prosthesicardiovascular diseasesAortaNeuroradiologyAortamedicine.diagnostic_testbusiness.industryMultidetector CTUltrasoundInterventional radiologySettore MED/23 - Chirurgia CardiacaGeneral MedicineMiddle Agedmedicine.diseaseIopamidolAortic valve replacementTreatment OutcomeEchocardiographyEcg gatingcardiovascular systemRadiographic Image Interpretation Computer-AssistedFemaleRadiologybusinessTomography X-Ray ComputedSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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Italian multicenter, prospective study to evaluate the negative predictive value of 16- and 64-slice MDCT imaging in patients scheduled for coronary …

2009

This was a prospective, multicenter study designed to evaluate the utility of MDCT in the diagnosis of coronary artery disease (CAD) in patients scheduled for elective coronary angiography (CA) using different MDCT systems from different manufacturers. Twenty national sites prospectively enrolled 367 patients between July 2004 and June 2006. Computed tomography (CT) was performed using a standardized/optimized scan protocol for each type of MDCT system (> or =16 slices) and compared with quantitative CA performed within 2 weeks of MDCT. A total of 284 patients (81%) were studied by 16-slice MDCT systems, while 66 patients (19%) by 64-slice MDCT scanners. The primary analysis was on-site/off…

Coronary angiographyAdultDiagnostic ImagingMalemedicine.medical_specialtyCoronary Artery DiseaseCoronary Angiographydiagnosis/radiographyCoronary artery diseasemethodsCoronary artery disease16- and 64-slice MDCT imaging coronary angiographySettore MED/36 - Diagnostica per Immagini e RadioterapiaPredictive Value of TestsCoronary Angiography/*methods Coronary Artery Disease/*diagnosis/*radiography Diagnostic Imaging/methods80 and overCardiac CTMedicineHumansRadiology Nuclear Medicine and imagingIn patientcardiovascular diseasesProspective StudiesProspective cohort studyTomographyNeuroradiologyAgedAged 80 and overmedicine.diagnostic_testbusiness.industryMultidetector CTNon invasiveReproducibility of ResultsInterventional radiologyGeneral MedicineAdult Aged Aged; 80 and over Coronary Angiography; methods Coronary Artery Disease; diagnosis/radiography Diagnostic Imaging; methods Female Humans Italy Male Middle Aged Predictive Value of Tests Prospective Studies Reproducibility of Results Tomography; X-Ray Computed; methodsMiddle Agedmedicine.diseasePredictive valueSettore MED/11 - Malattie Dell'Apparato CardiovascolareX-Ray Computedcoronary angiographyCTCardiac CT; Coronary artery disease; Multidetector CTItalyFemaleRadiologycoronary angiographybusinessTomography X-Ray Computed
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Adult exposures from MDCT including multiphase studies: first Italian nationwide survey.

2014

To evaluate the radiation dose in routine multidetector computed tomography (MDCT) examinations in Italian population.This was a retrospective multicentre study included 5,668 patients from 65 radiology departments who had undergone common CT protocols: head, chest, abdomen, chest–abdomen–pelvis (CAP), spine and cardiac. Data included patient characteristics, CT parameters, volumetric CT dose index (CTDIvol) and dose length product (DLP) for each CT acquisition phase. Descriptive statistics were calculated, and a multi-regression analysis was used to outline the main factors affecting exposure.The 75th percentiles of CTDIvol (mGy) and DLP (mGy cm) for whole head were 69 mGy and 1,312 mGy cm…

AdultMaleRadiography Abdominalmedicine.medical_specialtyNationwide survey; Radiation protection; Multidetector CT; Patient dose; Diagnostic reference levelsMultidetector ctNationwide surveyRadiation DosageDiagnostic reference levelsSettore MED/01 - Statistica MedicaSurveys and QuestionnairesMultidetector computed tomographyMultidetector Computed TomographymedicineHumansRadiology Nuclear Medicine and imagingMedical physicscardiovascular diseasesNeuroradiologyRetrospective StudiesRadiation protectionbusiness.industryMultidetector CTRadiation doseGeneral MedicineItalian populationSettore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)surgical procedures operativeItalycardiovascular systemPatient doseFemaleRadiography ThoracicRadiologybusinessSettore MED/36 - Diagnostica Per Immagini E RadioterapiaNationwide surveyPatient doseEuropean radiology
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Incidence of new foci of hepatocellular carcinoma after radiofrequency ablation: role of multidetector CT

2012

Purpose. The authors sought to assess the incidence of new foci of hepatocellular carcinoma (HCC) using multidetector computed tomography (MDCT) in patients treated with radiofrequency ablation (RFA). Materials and methods. Two readers retrospectively reviewed by consensus the follow-up MDCT studies of 125 patients (88 men and 37 women; mean age 68 years) with 141 HCCs (size 1–5.2 cm; mean 2.2 cm) treated with RFA. MDCT follow-up was performed at 1 and 3 months and every 6–12 months thereafter. Reviewers assessed: (1) the presence of new HCC foci in the same liver segment or in a different segment; (2) complete or incomplete tumor ablation; (3) tumour progression. Results. A total of 113 ne…

Malemedicine.medical_specialtyCarcinoma HepatocellularRadiofrequency ablationMultidetector ctSettore MED/01 - Statistica Medicalaw.inventionLiver neoplasmslawMultidetector Computed TomographymedicineHumansRadiology Nuclear Medicine and imagingAgedRetrospective StudiesNeuroradiologyChi-Square Distributionmedicine.diagnostic_testbusiness.industryIncidenceIncidence (epidemiology)Radiofrequency ablation (RFA)UltrasoundInterventional radiologyGeneral MedicineMiddle AgedHCCSmedicine.diseasedigestive system diseasesTreatment OutcomeLiverHepatocellular carcinomaCatheter AblationDisease ProgressionRadiofrequency ablation (RFA); Liver; CT; Liver neoplasmsFemaleRadiologyNeoplasm Recurrence LocalSettore MED/36 - Diagnostica Per Immagini E RadioterapiabusinessFollow-Up StudiesCTLa radiologia medica
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64-MDCT ECG gating in the evaluation of pre and post-operative ascending aorta: what is essential to know and necessary to report?

2007

Multidetector CT ascending aortaSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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SEMI-AUTOMATIC VOLUMETRIC SEGMENTATION OF THE UPPER AIRWAYS IN PATIENTS WITH PIERRE ROBIN SEQUENCE

2014

Pierre Robin malformation is a rare craniofacial dysmorphism whose pathogenesis is multifactorial. Although there is some agreement in non-invasive treatment in less severe cases, the dispute is still open on cases with severe respiratory impairment. We present a semi-automatic novel diagnostic tool for calculating upper airway volume, in order to eventually address surgery in patients with Pierre Robin Sequence (PRS). Multidetector CT datasets of two patients and two controls were tested to assess the proposed method for ROI segmentation, upper airway volume computation and three-dimensional reconstructions. The experimental results show an irregular pattern and a severely reduced cross-s…

MalePathologymedicine.medical_specialtymultidetector CTJaccard indexMultidetector ctImaging Three-DimensionalSimilarity (network science)Multidetector Computed TomographyImage Processing Computer-AssistedMedicineHumansRadiology Nuclear Medicine and imagingIn patientSegmentationairway model reconstructionRobin SequencePierre Robin sequenceAnatomy Cross-SectionalPierre Robin Syndromebusiness.industryairways segmentationInfantGeneral MedicineOriginal ArticlesOrgan SizePIERRE ROBIN SEQUENCE MULTIDETECTOR CT3D renderingAirway ObstructionRegion growingCase-Control StudiesPharynxFemaleNeurology (clinical)LarynxAirwaybusinessNuclear medicineregion growing
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Evaluation of Cardiac Volumetric and Functional Parameters

2008

Multidetector CT functional parameters coronary arteriesSettore MED/36 - Diagnostica Per Immagini E Radioterapia
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Forty-slice MDCT enteroclysis: evaluation after oral administration of isotonic solution in Crohn's disease.

2007

Objective. The aim of this study was to evaluate the accuracy of multidetector computed tomography (MDCT) enteroclysis after oral hyperhydration with isotonic solution in detecting bowel wall alterations in patients with Crohn’s disease. Materials and methods. Twenty-eight patients with a diagnosis of Crohn’s disease established by ileocolonoscopy and histology were enrolled in the study; 15 patients with negative ileocolonoscopy served as controls. In all cases, MDCT enteroclysis was performed after oral administration of 2,000 ml of isotonic solution and intravenous administration of N-butylscopolamine. Axial, isotropic multiplanar and volume-rendered reconstructions were used to evaluate…

AdultMalemedicine.medical_specialtymedicine.medical_treatmentAdministration OralContrast MediaIntestino tenueSensitivity and SpecificityPolyethylene GlycolsCrohn DiseaseOral administrationPatologie gastrointestinaliIntestine SmallMedicineIntubationHumansRadiology Nuclear Medicine and imagingNeuroradiologyTC multidetettoreCrohn's diseasemedicine.diagnostic_testbusiness.industryCatharticsMultidetector CTUltrasoundInterventional radiologyGeneral MedicineEnemamedicine.diseaseGastrointestinal diseaseSmall boweldigestive system diseasesSpiral computed tomographyIopamidolFemaleRadiologyIsotonic SolutionsbusinessTomography X-Ray ComputedLa Radiologia medica
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