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Neuroimaging

Chia sẻ: Ryr Ryr | Ngày: | Loại File: PDF | Số trang:144

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Neuroimaging

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Measuring the CT attenuation of intraperitoneal fluid (figures 1, 2.) has proved exceedingly useful in its characterization, because intraperitoneal fluid collections in trauma patients may not always represent blood. Although there is variation with individual scanners, hemoperitoneum usually measures greater than 30 HU. By comparison, water-dense fluids in a trauma patient, such as ascites, urine, bile, or intestinal contents, measure 0 to 5 or 10 HU. The recognition of water-dense fluids can be assisted by visual comparison with a fluid- filled structure, such as the gallbladder, or the soft tissue density of abdominal wall musculature; however, one may be misled by...

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