Investigative radiology
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Investigative radiology · Feb 1994
An image analyzing system for interstitial lung abnormalities in chest radiography. Detection and classification by Laplacian-Gaussian filtering and linear opacity judgment.
The effectiveness of a computerized analysis system to detect and characterize interstitial lung abnormalities seen on chest radiographs was evaluated. This method included a process of four-directional Laplacian-Gaussian filtering and a process of linear opacity judgement. For quantitative analysis of interstitial opacities, the radiographic index, which is the percentage of opacity areas in a region of interest, was obtained and evaluated in the images. These opacities represented interstitial lung abnormalities. ⋯ These results indicate that this system is useful for the detection and characterization of interstitial lung abnormalities.
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Investigative radiology · Sep 1993
Modulation of the renal effects of contrast media by endothelium-derived nitric oxide in the rat.
A possible involvement of endothelium derived relaxing nitric oxide (NO) in the pathogenesis of iodinated contrast media (CM)-induced nephrotoxicity was investigated in the rat. ⋯ These data indicate that L-NAME, a specific inhibitor of NO-synthase, and phenylephrine, accentuate the nephrotoxicity of CM in the rat. This is consistent with results from the literature showing that CM-toxicity is enhanced by renal ischemia.
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Investigative radiology · Aug 1993
Comparative StudyComparative evaluation of digital radiography versus conventional radiography of fractured skulls.
The authors assessed the relative efficacy of conventional and digital storage-phosphor radiographs for the detection of skull fractures. ⋯ In evaluation of skull fractures, radiologists performance with DR is equivalent to FSR.
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Investigative radiology · Jan 1993
The night stalker effect: quality improvements with a dedicated night-call rotation.
The authors assessed whether a non-sleep-deprived, second-year diagnostic radiology resident assigned to an after-hours "night stalker" emergency radiology (ER) rotation in an urban university hospital has a measurable impact on the number and clinical significance of "missed" radiologic findings. ⋯ A dedicated night-shift ER coverage of a busy urban ED improves quality, appropriateness, and timeliness of patient care.