J Korean Radiol Soc.
1999 Apr;40(4):705-711. 10.3348/jkrs.1999.40.4.705.
CT Evaluation of Solitary Pulmonary Nodule: Value of Additional HRCT Scan
- Affiliations
-
- 1Department of Diagnostic Radiology, Pundang CHA General Hospital, College of Medicine, Pochon CHA University, Korea.
- 2Department of Radiology, Samsung Medical Center, College of Medicine, Sung Kyun Kwan University, Korea.
- 3Department of Diagnostic Radiology, College of Medicine, Ewha Womans University, Korea.
- KMID: 2103297
- DOI: http://doi.org/10.3348/jkrs.1999.40.4.705
Abstract
-
PURPOSE: The aim of our study was to evaluate the usefulness of high-resolution CT scans in addition tohelical CT for characterizing a solitary pulmonary nodule.
MATERIALS AND METHODS
Our study included 49 patientswith a solitary pulmonary nodule ; in each patient this was evaluated by both additional high-resolution CT andhelical scanning. Images were evaluated by three independent observers, each of whom read them twice : initiallywith helical CT images only and then with helical images plus high-resolution CT images. After analysis, theobservers recorded the following : histologic diagnosis, benignancy or malignancy of a nodule, and confidence intheir diagnosis (three scales).
RESULTS
In differentiating benign and malignant nodules, the accuracy of helicalscans only was 75% (110/147 readings) whereas that of helical plus high-resolution CT scans was 82% (121/147readings) (p=0.001). Correct histologic diagnosis was made in 47% of cases (69/147 readings) when helical scansonly had been evaluated and in 48% of cases (71/147 readings) for which both helical and high-resolotion CT scanswere available (p=0.815). Diagnosis was more often highly confident on the basis of additional high-resolution CTscans (25%) than helical scans only (5%) (p=0.001) .
CONCLUSION
By enhancing differential diagnosticaccuracy between benign and malignant nodules and by increasing confidence in the histologic diagnosis of apulmonary nodule, additional high-resolution CT scans are valuable for the evaluation of a solitary pulmonarynodule.
