Seminars in ultrasound, CT, and MR
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Semin. Ultrasound CT MR · Feb 2000
ReviewTargeted helical CT of the acute abdomen: appendicitis, diverticulitis, and small bowel obstruction.
CT, especially helical CT, provides a fast and reliable modality for evaluation of the patient presenting with acute abdominal pain. Helical CT can provide an accurate diagnosis in the majority of patients and has found great utility in the evaluation of acute gastrointestinal emergencies, including acute appendicitis, diverticulitis, and small bowel obstruction. This article reviews proper helical CT technique, diagnostic imaging findings, and pitfalls of interpretation in evaluation of these acute abdominal disorders.
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Fungal diseases of the paranasal sinuses can be categorized into the invasive and noninvasive varieties. The invasive form has been classified as acute fulminant fungal sinusitis, granulomatous invasive fungal sinusitis, and chronic invasive fungal sinusitis. The noninvasive form can be classified as the fungus ball and the allergic fungal sinusitis. The following review discusses the various types of fungal sinusitis with a special emphasis on the CT and MR imaging features.
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The clinical presentation of sinonasal malignancy overlaps that of more common benign inflammatory disease. For this reason, unsuspected malignant lesions are often first recognized on the screening CT exam. We will focus on the initial CT appearance of various malignancies and discuss the goals of imaging including the use of MR.
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CT performed without oral or intravenous contrast is the initial imaging study of choice in many situations for the detection of hemorrhage anywhere in the abdomen and pelvis. The presence or absence of hemorrhage can be determined rapidly, and the amount and precise location of hemorrhage can also be evaluated. This article reviews the appearances and the common and unusual etiologies of abdominal and pelvic hemorrhage on unenhanced CT. The role of intravenous contrast-enhanced CT in patients with known or suspected abdominal and pelvic hemorrhage is also examined.
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Semin. Ultrasound CT MR · Apr 1999
ReviewUnenhanced CT in the evaluation of the acute abdomen: the community hospital experience.
The "Great Mimicker," acute appendicitis, has finally found its match with the advent of rapid unenhanced computed tomography (RUCT). With little, if any, operator dependence, RUCT can be performed easily at any facility that has CT capabilities. ⋯ In this article we describe our experience, since devising the technique in 1991, with over 7,000 RUCT scans done on patients with acute abdominal pain, predominantly in the right lower quadrant. We show how RUCT is extremely useful and accurate, not only in the diagnosis of acute appendicitis, but in many other disease entities that mimic the "Great Mimicker."