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KMID : 0948320040040020172
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Konyang Medical Journal
2004 Volume.4 No. 2 p.172 ~ p.176
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Usefulness of Virtual Bronchoscopy by Using 16 Slice Multidetector Row CT
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Cho Young-Jun
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Abstract
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We compare the virtual bronchoscopy by using 16 slice multidetector row CT with flexible bronchoscopy at detection of abnormal bronchial lesion. Multidetector CT was used to examine 198 bronchial sections obtained 22 patients. Multidetector CT was performed using the following parameter: collimination 5 mm, 120 Kvp, 160-180 mAs, and reconstruction intervals, 2 mm. Postprocessing was performed using volume rendering and virtual bronchoscopy. In case in which the abonormal bronchial lesion was present, the following points were analysed; 1) Irrgular endobronchial lumen; 2) Smooth stenosis of endobronchial lumen; 3) Irregular stenosis of endobronchial lumen; 4) Complete obstruction of endobronchial lumen; 5) Poypoid mass of endobronchial lumen; 6) Anomaly of bronchus. We compare the result of virtual bronchoscopy with report of flexible bronchoscopy. Flexible bronchoscopy revealed 30 abnormal lesion in 198 bronchial section. Virtual bronchoscopy detected 36 abnormal lesion in the same bronchial section. virtual bronchoscopic finding was highly accuracy (Irregular lumen, 97%; Smooth stenosis, 98%; Irregular stenosis 97%; Complete obstruction 98%; Polypoid mass 100%; Bronchial anomaly 100%). The number of falsepositive findings was high in the lobar bronchus and segmental bronchus (10 false-positive findings) than in the trachea and main bronchus (3 false-positive findings). Virtual bronchoscopy using 16 slice multidetector CT is reliable noninvasive method for the detection of abnormal bronchial lesion. However, the number of false-positive findings was higher for small diameter of bronchial lumen and iregular bronchial lumen.
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KEYWORD
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Multidetctor CT, Virtual bronchoscopy
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