Variability of Semiautomated Lung Nodule Volumetry on Ultralow-Dose CT: Comparison with Nodule Volumetry on Standard-Dose CT
نویسندگان
چکیده
منابع مشابه
Influences in CT scan lung nodule volumetry.
Lung nodule measurements made with CT imaging are used in clinical practice to assess size changes estimated from serial scans obtained over time to predict the likelihood of malignancy and to monitor the tumor response to treatment. 2 Size measurements need to be accurate and consistent to enable the assessment of nodule changes in a short time interval. Th e precision and accuracy of volume m...
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OBJECTIVE To determine the usefulness of a computer-aided diagnosis (CAD) system for the automated detection of lung nodules at low-dose CT. MATERIALS AND METHODS A CAD system developed for detecting lung nodules was used to process the data provided by 50 consecutive low-dose CT scans. The results of an initial report, a second look review by two chest radiologists, and those obtained by the...
متن کاملInherent variability of CT lung nodule measurements in vivo using semiautomated volumetric measurements.
OBJECTIVE The objective of our study was to evaluate repeatability and reproducibility of lung nodule volume measurements using volumetric nodule-sizing software. MATERIALS AND METHODS Fifty nodules, less than 20 mm in diameter, in 29 patients were scanned with 1.25-mm collimation using MDCT (time 1 = T1). During the same session, two additional scans, using identical technique, were obtained...
متن کاملWavelet compression of low-dose chest CT data: effect on lung nodule detection.
PURPOSE To assess the effect of using a lossy Joint Photographic Experts Group standard for wavelet image compression, JPEG2000, on pulmonary nodule detection at low-dose computed tomography (CT). MATERIALS AND METHODS One hundred sets of lung CT data ("cases") were compressed to 30:1, 20:1, and 10:1 levels by using a wavelet-based JPEG2000 method, resulting in 400 test cases. Each case consi...
متن کاملComparison of sensitivity of lung nodule detection between radiologists and technologists on low-dose CT lung cancer screening images.
OBJECTIVES The objective of this study was to compare the sensitivity of detection of lung nodules on low-dose screening CT images between radiologists and technologists. METHODS 11 radiologists and 10 technologists read the low-dose screening CT images of 78 subjects. On images with a slice thickness of 5 mm, there were 60 lung nodules that were ≥5 mm in diameter: 26 nodules with pure ground...
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ژورنال
عنوان ژورنال: Journal of Digital Imaging
سال: 2008
ISSN: 0897-1889,1618-727X
DOI: 10.1007/s10278-008-9157-5