Search results for "CT colonography"

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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
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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
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