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Effect of investigator experience in CT colonography
- Source :
- European Radiology. 12:1405-1409
- Publication Year :
- 2002
- Publisher :
- Springer Science and Business Media LLC, 2002.
-
Abstract
- The aim of this study was to determine the impact of the learning curve on the diagnostic performances of CT colonography. Two blinded teams, each having a radiologist and gastroenterologist, prospectively examined 50 patients using helical CT scan followed by colonoscopy. Intermediate data evaluation was performed after 24 data sets (group 1) and compared with data from 26 subsequent patients (group 2). Parameters evaluated included sensitivity, specificity, false-positive and false-negative findings, time of data acquisition and interpretation. Using colonoscopy as the gold standard, sensitivity for CT colonography was for lesions5 mm 63% for both teams for group 1 patients; for group 2 patients sensitivity was 45% for team 1 and 64% for team 2. Specificity per patients was for patient group 1 42% for team 1 and 58% for team 2; for patient group 2 it was 79% for both teams ( p=0.04 for team 1; p=0.2 for team 2). Comparing group 1 with group 2, the number of false-positive findings decreased significantly ( p=0.02). Furthermore, the mean time of data evaluation decreased from 45 to 17 min ( p=0.002) and the mean time of data acquisition from 19 to 17 min. With increasing experience, specificity and the time required for data interpretation improved and false positives decreased. There was no significant change of sensitivity, false-negative findings and time of data acquisition. A minimum experience of the readers is required for data interpretation of CT colonography.
- Subjects :
- Male
medicine.medical_specialty
Colonoscopy
Sensitivity and Specificity
Time
medicine
Humans
False Positive Reactions
Radiology, Nuclear Medicine and imaging
Prospective Studies
Patient group
False Negative Reactions
Aged
Neuroradiology
medicine.diagnostic_test
business.industry
Data interpretation
Interventional radiology
General Medicine
Gold standard (test)
Helical ct
Female
Clinical Competence
Radiology
business
Colonography, Computed Tomographic
Subjects
Details
- ISSN :
- 14321084 and 09387994
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- European Radiology
- Accession number :
- edsair.doi.dedup.....c501898619ab93aa380d2f2dc55e20cf