Volumetric measurement of pulmonary nodules at low-dose chest CT: effect of reconstruction setting on measurement variability
نویسندگان
چکیده
منابع مشابه
Small pulmonary nodules: volume measurement at chest CT--phantom study.
Three-dimensional methods for quantifying pulmonary nodule volume at computed tomography (CT) and the effect of imaging variables were studied by using a realistic phantom. Two fixed-threshold methods, a partial-volume method (PVM) and a variable method, were used to calculate volumes of 40 plastic nodules (largest dimension, <5 mm: 20 nodules with solid attenuation and 20 with ground-glass att...
متن کامل[Effects of different reconstruction parameters on CT volumetric measurement of pulmonary nodules].
BACKGROUND AND OBJECTIVE It has been proven that volumetric measurements could detect subtle changes in small pulmonary nodules in serial CT scans, and thus may play an important role in the follow-up of indeterminate pulmonary nodules and in differentiating malignant nodules from benign nodules. The current study aims to evaluate the effects of different reconstruction parameters on the volume...
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A new measurement of the pulmonary artery diameter is obtained where the artery may be robustly segmented between the heart and the artery bifurcation. An automated algorithm is presented that can make this pulmonary artery measurement in low-dose non-contrast chest CT images. The algorithm uses a cylinder matching method following geometric constraints obtained from other adjacent organs that ...
متن کاملMeasurement of organ dose in chest CT examination using Monte Carlo simulation
Background: Exposure conditions in CT examinations are quite different from conventional Xray. In CT examination higher dose is given to patient in comparison with the dose in other diagnostic examinations. In order to calculate organ effective dose in chest CT, Monte Carlo simulation has been used in this study. Materials and Methods: The Impact survey data were used to determine the ...
متن کاملPulmonary nodules at chest CT: effect of computer-aided diagnosis on radiologists' detection performance.
PURPOSE To evaluate the effect of computer-aided diagnosis (CAD) on radiologists' detection of pulmonary nodules. MATERIALS AND METHODS Fifty chest computed tomographic (CT) examination cases were used. The mean nodule size was 0.81 cm +/- 0.60 (SD) (range, 0.3-2.9 cm). Alternative free-response receiver operating characteristic (ROC) analysis with a continuous rating scale was used to compar...
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ژورنال
عنوان ژورنال: European Radiology
سال: 2009
ISSN: 0938-7994,1432-1084
DOI: 10.1007/s00330-009-1634-9