CT colonography: effect of computer-aided detection of colonic polyps as a second and concurrent reader for general radiologists with moderate experience in CT colonography.
Eur Radiol
; 24(7): 1466-76, 2014 Jul.
Article
in En
| MEDLINE
| ID: mdl-24816931
ABSTRACT
OBJECTIVES:
To assess the effectiveness of computer-aided detection (CAD) as a second reader or concurrent reader in helping radiologists who are moderately experienced in computed tomographic colonography (CTC) to detect colorectal polyps.METHODS:
Seventy CTC datasets (34 patients 66 polyps ≥6 mm; 36 patients no abnormalities) were retrospectively reviewed by seven radiologists with moderate CTC experience. After primary unassisted evaluation, a CAD second read and, after a time interval of ≥4 weeks, a CAD concurrent read were performed. Areas under the receiver operating characteristic (ROC) curve (AUC), along with per-segment, per-polyp and per-patient sensitivities, and also reading times, were calculated for each reader with and without CAD.RESULTS:
Of seven readers, 86% and 71% achieved a higher accuracy (segment-level AUC) when using CAD as second and concurrent reader respectively. Average segment-level AUCs with second and concurrent CAD (0.853 and 0.864) were significantly greater (p < 0.0001) than average AUC in the unaided evaluation (0.781). Per-segment, per-polyp, and per-patient sensitivities for polyps ≥6 mm were significantly higher in both CAD reading paradigms compared with unaided evaluation. Second-read CAD reduced readers' average segment and patient specificity by 0.007 and 0.036 (p = 0.005 and 0.011), respectively.CONCLUSIONS:
CAD significantly improves the sensitivities of radiologists moderately experienced in CTC for polyp detection, both as second reader and concurrent reader. KEY POINTS ⢠CAD helps radiologists with moderate CTC experience to detect polyps ≥6 mm. ⢠Second and concurrent read CAD increase the radiologist's sensitivity for detecting polyps ≥6 mm. ⢠Second read CAD slightly decreases specificity compared with an unassisted read. ⢠Concurrent read CAD is significantly more time-efficient than second read CAD.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiology
/
Colonic Polyps
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Diagnosis, Computer-Assisted
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Clinical Competence
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Colonography, Computed Tomographic
Type of study:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
Limits:
Aged
/
Female
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Humans
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Male
/
Middle aged
Language:
En
Journal:
Eur Radiol
Journal subject:
RADIOLOGIA
Year:
2014
Document type:
Article