TY - JOUR
TI - Virtual bronchoscopy versus thin section computed-tomography in
evaluation of moderate and low grade stenoses: Receiver operating
characteristic curve analysis
AU - Maniatis, PN
AU - Triantopoulou, CC
AU - Tsalafoutas, IA
AU - Lamprakis, CK
AU - and Malagari, KS
AU - Konstantinou, K
AU - Christodoulou, E
AU - Papailiou,
AU - J
AU - Kelekis, DA
JO - Acta Radiologica - Series Diagnosis
PY - 2006
VL - 47
TODO - 1
SP - 48-57
PB - SAGE Publications Ltd
SN - null
TODO - 10.1080/02841850500406837
TODO - observer performance; thin section CT; virtual bronchoscopy
TODO - Purpose: To evaluate the impact of virtual bronchoscopy, under proper
threshold settings, on observer level of confidence in the assessment of
bronchial abnormalities producing stenoses <= 75% compared to
interpretation of thin section computed tomography (CT) images.
Material and Methods: Sixty-five patients with fiberoptic bronchoscopy
positive for trachcobronchial abnormalities were evaluated in a blinded
observer study using a commercially available virtual endoscopy software
package. The findings of virtual endoscopy were compared with those of
fiberoptic bronchoscopy using receiver operating characteristic curves
(ROCs) and other statistical tools.
Results: A total of 102 lesions were identified by fiberoptic
bronchoscopy, with 44 of these producing bronchial stenoses <= 75%.
Concerning the latter lesions, for virtual bronchoscopy the areas under
the ROCs were 0.93 and 0.96 for the two observers, respectively, while
for thin section CT the corresponding values were 0.86 and 0.88; the
differences observed were statistically significant. Contrary to thin
section CT, virtual bronchoscopy did not show statistically significant
differences from fiberoptic bronchoscopy regarding estimation of degree
of stenosis.
Conclusion: Virtual bronchoscopy under-proper threshold settings has a
statistically significant impact on observer performance where moderate
and low-grade bronchial stenoses are concerned and gives an estimate of
the-degree of stenosis more precisely than thin section CT.
ER -