AJR. American journal of roentgenology
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AJR Am J Roentgenol · Feb 2008
Comparative StudyDynamic oxygen-enhanced MRI versus quantitative CT: pulmonary functional loss assessment and clinical stage classification of smoking-related COPD.
The purpose of the present study is to prospectively compare the capability of dynamic oxygen-enhanced MRI and quantitative CT for pulmonary functional loss assessment and clinical stage classification of smoking-related chronic obstructive pulmonary disease (COPD). ⋯ Dynamic oxygen-enhanced MRI has potential for pulmonary functional loss assessment and clinical stage classification of smoking-related COPD as does quantitative CT.
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AJR Am J Roentgenol · Feb 2008
Comparative StudyProspective evaluation of image quality with use of a patient image gallery for dose reduction in pediatric 16-MDCT.
The purposes of this study were to evaluate prospective adjustment of dose settings in pediatric 16-MDCT by use of computer-simulated images in a patient image gallery and to compare the dose reduction achieved with that of standard pediatric protocols. ⋯ A patient image gallery can be used as a basis for pediatric 16-MDCT examinations. The gallery provides a preexamination overview of expected image quality. Radiation exposure can be optimized with regard to patient weight and the image quality needed to answer the clinical question.
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AJR Am J Roentgenol · Jan 2008
Allergic-like breakthrough reactions to gadolinium contrast agents after corticosteroid and antihistamine premedication.
The objective of our study was to determine the number and severity of allergic-like breakthrough reactions to i.v. gadolinium-containing contrast agents in children and adults after premedication with corticosteroids and antihistamines. ⋯ Allergic-like reactions to gadolinium-containing contrast media can occur despite premedication with corticosteroids and antihistamines.
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AJR Am J Roentgenol · Jan 2008
MDCT and radiography of wrist fractures: radiographic sensitivity and fracture patterns.
The purpose of our study was to determine which wrist fractures are not prospectively diagnosed at radiography using CT as a gold standard and to identify specific fracture patterns. ⋯ Thirty percent of wrist fractures were not prospectively diagnosed on radiography, suggesting that CT should be considered after a negative radiographic finding if clinically warranted. The location of a dorsal scaphoid avulsion fracture emphasizes the need for specific radiographic views or cross-sectional imaging for diagnosis.
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AJR Am J Roentgenol · Jan 2008
Small and diminutive polyps detected at screening CT colonography: a decision analysis for referral to colonoscopy.
The objective of this study was to assess the clinical and economic impact of colonoscopic referral for small and diminutive polyps detected at CT colonography (CTC) screening. ⋯ For diminutive polyps detected at CTC screening, the very low likelihood of advanced neoplasia and the high costs associated with polypectomy argue against colonoscopic referral, whereas removal of large CTC-detected polyps is highly effective. The yield of colonoscopic referral for small polyps is relatively low, suggesting that CTC surveillance may be a reasonable management option.