Search results for " Computed Tomographic"

showing 5 items of 5 documents

Computed Virtual Chromoendoscopy for Classification of Small Colorectal Lesions: A Prospective Comparative Study

2007

Standard colonoscopy offers no reliable discrimination between neoplastic and nonneoplastic colorectal lesions. Computed virtual chromoendoscopy with the Fujinon intelligent color enhancement (FICE) system is a new dyeless imaging technique that enhances mucosal and vascular patterns. This prospective trial compared the feasibility of FICE, standard colonoscopy, and conventional chromoendoscopy with indigo carmine in low- and high-magnification modes for determination of colonic lesion histology.Sixty-three patients with 150 flat or sessile lesions less than 20 mm in diameter were enrolled. At colonoscopy, each lesion was observed with six different endoscopic modalities: standard colonosco…

AdultMalemedicine.medical_specialtyColonic PolypsRectumIndigo CarmineSensitivity and SpecificityChromoendoscopyPredictive Value of TestsImage Processing Computer-AssistedmedicineHumansColoring AgentsAgedAged 80 and overObserver VariationHepatologymedicine.diagnostic_testbusiness.industryGastroenterologyColonoscopyMiddle AgedImage EnhancementEndoscopymedicine.anatomical_structureFemaleRadiologyColorectal NeoplasmsbusinessColonography Computed TomographicThe American Journal of Gastroenterology
researchProduct

Accuracy of CT colonography in the preoperative staging of colon cancer: a prospective study of 217 patients

2019

Aim The purpose of the present study was to evaluate the accuracy of computed tomography colonography (CTC) in the preoperative localization and TN staging of colon cancer. CTC can be an effective technique for preoperative evaluation of colon cancer and could facilitate the selection of high-risk patients who may benefit from neoadjuvant chemotherapy. Method This was a prospective observational study conducted at a single tertiary-care centre. It involved 217 patients (225 tumours) who had colon cancer and underwent preoperative CTC and elective colectomy. The radiologist determined the TNM stage using postprocessing software with multiplanar images and virtual colonoscopy. The following c…

AdultMalemedicine.medical_specialtyVirtual colonoscopyColorectal cancermedicine.medical_treatmentColonoscopySensitivity and SpecificitySurgical planning03 medical and health sciences0302 clinical medicineCT-Colonography Colon cancer Preoperative stagingComputed Tomography ColonographyPreoperative CaremedicineHumansProspective StudiesStage (cooking)Prospective cohort studyAgedNeoplasm StagingColectomyAged 80 and overmedicine.diagnostic_testbusiness.industryPatient SelectionGastroenterologyMiddle Agedmedicine.diseasedigestive system diseasesNeoadjuvant Therapy030220 oncology & carcinogenesisColonic NeoplasmsFemale030211 gastroenterology & hepatologyRadiologybusinessColonography Computed TomographicColorectal Disease
researchProduct

Patient centring and scan length: how inaccurate practice impacts on radiation dose in CT colonography (CTC).

2019

Objective: The aim of this study was to acknowledge errors in patients positioning in CT colonography (CTC) and their effect in radiation exposure. Materials and methods: CTC studies of a total of 199 patients coming from two different referral hospitals were retrospectively reviewed. Two parameters have been considered for the analysis: patient position in relation to gantry isocentre and scan length related to the area of interest. CTDI vol and DLP were extracted for each patient. In order to evaluate the estimated effective total dose and the dose to various organs, we used the CT-EXPO ® software version 2.2. This software provides estimates of effective dose and doses to the other vario…

MaleRadiology Nuclear Medicine and ImagingSupine positionTime FactorsEstimatedRadiotherapy Setup ErrorsRadiation DosageEffective dose (radiation)Patient Positioning030218 nuclear medicine & medical imagingCentringCohort Studies03 medical and health sciences0302 clinical medicineCT colonography; CTC; estimated; isocentre; positioning; scan length; radiology; nuclear nedicine and imagingnuclear nedicine and imagingCT colonographyProne PositionSupine PositionMedicineHumansIn patientAgedRetrospective StudiesMedical Errorsbusiness.industryUltrasoundRadiation doseAnal orificeScan lengthGeneral MedicineMiddle AgedRadiation ExposureCTCradiologyIsocentre030220 oncology & carcinogenesisTotal doseFemalebusinessNuclear medicineColonography Computed TomographicPositioningLa Radiologia medica
researchProduct

CT Angiography at 24 Months Demonstrates Durability of EVAR With the Use of Chimney Grafts for Pararenal Aortic Pathologies

2013

PURPOSE: To present the 24-month radiological follow-up data for patients with pararenal aortic pathologies treated with chimney and periscope grafts during endovascular repair. METHODS: Between January 2008 and December 2011, 124 high-risk patients with complex pararenal aortic pathologies were treated using the chimney technique at 2 European vascular and cardiovascular centers with advanced experience of the described technique. In particular, 50 patients were treated at Site 1 and 74 at Site 2. Forty (32.2%) patients (32 men; mean age 79.2±4.9 years) completed computed tomographic angiography follow-up at 24 months postoperatively. RESULTS: The overall technical success was 100%, and th…

Malemedicine.medical_specialtyTime Factorsmedicine.medical_treatmentAortic Diseases610 Medicine & healthEndovascular aneurysm repair2705 Cardiology and Cardiovascular MedicineAortic aneurysmAneurysmmedicine.arterymedicineHumans2741 Radiology Nuclear Medicine and ImagingRadiology Nuclear Medicine and imagingAorta AbdominalEmbolizationSuperior mesenteric arteryAgedendovascular aneurysm repair chimney graft periscope graft pararenal aortic pathologies aortic aneurysm para-anastomotic aneurysm ruptured aneurysm stent-graft balloon-expandable stent-graft computed tomographic angiography endoleak renal arteries superior mesenteric artery sac shrinkage sac expansionmedicine.diagnostic_test10042 Clinic for Diagnostic and Interventional Radiologybusiness.industryEndovascular ProceduresAngiographyPerioperativemedicine.diseaseBlood Vessel Prosthesis10020 Clinic for Cardiac Surgery2746 SurgerySurgeryCuffAngiographyFemaleStentsSurgeryRadiologyTomography X-Ray ComputedCardiology and Cardiovascular MedicinebusinessFollow-Up StudiesJournal of Endovascular Therapy
researchProduct

Diagnostic accuracy of computed tomographic colonography for the detection of advanced neoplasia in individuals at increased risk of colorectal cance…

2009

CONTEXT: Computed tomographic (CT) colonography has been recognized as an alternative for colorectal cancer (CRC) screening in average-risk individuals, but less information is available on its performance in individuals at increased risk of CRC. OBJECTIVE: To assess the accuracy of CT colonography in detecting advanced colorectal neoplasia in asymptomatic individuals at increased risk of CRC using unblinded colonoscopy as the reference standard. DESIGN, SETTING, AND PARTICIPANTS: This was a multicenter, cross-sectional study. Individuals at increased risk of CRC due to either family history of advanced neoplasia in first-degree relatives, personal history of colorectal adenomas, or positiv…

Maleoccult blood testColorectal cancerColonoscopycancer riskprediction and forecastingGastroenterologyRisk Factorscancer diagnosisPositive predicative valueadvanced cancerMedicineFamily historycomparative studycolorectal adenomafamily historyeducation.field_of_studymedicine.diagnostic_testarticleclinical trialGeneral MedicineColonoscopyMiddle Agedpriority journalrisk factorPredictive value of testsdiagnostic accuracyFemalediagnostic valueColorectal NeoplasmsColonography Computed TomographicradiographyComputed TomographicAdultmedicine.medical_specialtySettore MED/12 - GASTROENTEROLOGIAPopulationcolorectal cancerSensitivity and SpecificityPredictive Value of TestsInternal medicineadult; advanced cancer; aged; article; cancer classification; cancer diagnosis; cancer risk; clinical trial; colonoscopy; colorectal adenoma; colorectal cancer; computed tomographic colonography; controlled clinical trial; controlled study; cross-sectional study; diagnostic accuracy; diagnostic value; family history; female; human; major clinical study; male; multicenter study; occult blood test; predictive validity; priority journal; colorectal tumor; comparative study; middle aged; prediction and forecasting; radiography; risk factor; sensitivity and specificity; Adult; Aged; Colonography Computed Tomographic; Colonoscopy; Colorectal Neoplasms; Cross-Sectional Studies; Female; Humans; Male; Middle Aged; Predictive Value of Tests; Risk Factors; Sensitivity and Specificitycross-sectional studyHumanscontrolled studyhumaneducationAgedcontrolled clinical trialbusiness.industryFecal occult bloodSigmoidoscopyColonographymedicine.diseasecancer classificationcomputed tomographic colonographymajor clinical studypredictive validitymulticenter studyCross-Sectional StudiesCT colonography colorectal cancer screeningSettore MED/36 - Diagnostica Per Immagini E Radioterapiabusinesscolorectal tumorJAMA
researchProduct