Radiology
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To determine prospectively the diffusibility of water in normal lumbar disks in adults by using the mean apparent diffusion coefficient (ADC) and to determine if a relationship exists between disk ADC and magnetic resonance (MR) findings of disk degeneration. ⋯ A statistically significant decrease was seen in the ADC values of degenerated lumbar disks when compared with ADC values of normal disks. More caudal disks, even when normal, showed lower ADC values than more cephalic disks.
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To determine retrospectively the accuracy of screening ultrasonography (US) in patients with hypotension (systolic blood pressure
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Comparative Study
Current realities of delivering mammography services in the community: do challenges with staffing and scheduling exist?
To evaluate the current (2001-2002) capacity of community-based mammography facilities to deliver screening and diagnostic services in the United States. ⋯ Survey results show shortages of radiologists and certified mammography technologists.
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To evaluate depiction of urinary tract calculi at computed tomography (CT) with a z-axis modulation technique at various noise indexes to reduce radiation dose and preserve image quality. ⋯ Kidney stones (< or =2.5 mm) can be adequately depicted with the z-axis modulation technique, with a 56%-77% reduction in radiation dose. In patients with urinary tract stones, the technique results in a 43%-66% reduction in radiation dose at noise indexes of 14 and 20 without compromising stone depiction.
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Comparative Study
Tracheobronchomalacia: comparison between end-expiratory and dynamic expiratory CT for evaluation of central airway collapse.
To compare dynamic expiratory and end-expiratory computed tomography (CT) for depicting central airway collapse in patients with acquired tracheobronchomalacia (TBM). ⋯ Dynamic expiratory CT elicits a significantly greater degree of airway collapse than standard end-expiratory CT in patients with TBM.