Radiology
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To retrospectively determine the value of the nonvisualized appendix at multidetector computed tomography (CT) in patients with acute right lower quadrant pain in whom appendicitis was a consideration. ⋯ In patients with right lower quadrant pain, a nonvisualized appendix at multidetector CT reliably excludes acute appendicitis.
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To retrospectively evaluate the incidence of and risk factors for pneumothorax, pleural effusion, and chest tube placement for pneumothorax after radiofrequency (RF) ablation of lung tumors. ⋯ Pneumothorax and pleural effusion can occur after RF ablation in patients with lung tumors, and chest tube placement for pneumothorax is sometimes required.
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To prospectively evaluate magnetoencephalography (MEG) and functional magnetic resonance (MR) imaging, as compared with intraoperative cortical mapping, for identification of the central sulcus. ⋯ Although both MEG and functional MR imaging can provide useful information for neurosurgical planning, in the present study, MEG proved to be superior for locating the central sulcus. Activation of multiple nonprimary cerebral areas may confound the interpretation of functional MR imaging results.
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Comparative Study
Detection of simulated multiple sclerosis lesions on T2-weighted and FLAIR images of the brain: observer performance.
To determine observer performance in the detection of multiple sclerosis (MS) lesions on magnetic resonance (MR) images of the brain and to assess the dependence of observer performance on lesion size, parenchymal location, pulse sequence, and supratentorial versus infratentorial level. ⋯ Supratentorially, performance was better with FLAIR imaging than with T2-weighted MR imaging. Infratentorially, performance was moderate with both modalities. Observers did better with FLAIR imaging in the detection of cortical lesions, and performance improved with increasing lesion size.
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To retrospectively analyze computed tomographic (CT) findings of chronic idiopathic interstitial pneumonia (IIP) and to determine which findings are most helpful for distinguishing IIP from usual interstitial pneumonia (UIP) with univariate and multivariate analyses. ⋯ UIP has a characteristic appearance that usually facilitates distinction from other types of chronic IIPs at thin-section CT. The most useful finding when differentiating UIP from NSIP was the extent of honeycombing.