By Eisenberg, Ronald L. Eisenberg, Alexander R. Margulis
Univ. of California, San Francisco. Pocket-sized quick-reference consultant to choosing the proper and cheapest imaging procedure. comprises three hundred scientific difficulties, suggestion, and present fee comparisons. define structure. For clinicians and citizens. Prev. ed., c1996, was once titled Radiology Pocket Reference: What to reserve whilst. Trim measurement: 7 x four in. Softcover. DNLM: Diagnostic Imaging-Hdbk
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Extra info for What to Order When: Pocket Guide to Diagnostic Imaging
Computed tomography Preferred imaging technique 3. Ultrasound Alternative imaging technique 4. Radionuclide scan (indium or gallium) Examination of the entire abdomen and pelvis is indicated if an occult abscess is still suspected clinically despite negative US and CT studies Negative indium or gallium radionuclide scan effectively excludes an abscess Pelvic Abscess Presenting Signs and Symptoms Lower abdominal pain and tenderness Palpable mass on vaginal or rectal examination Fever and leukocytosis Common Causes Acute appendicitis Pelvic inflammatory disease Colon diverticulitis Approach to Diagnostic Imaging 1.
Infarct imaging is indicated if the clinical, laboratory, and electrocardiographic findings are equivocal; if there has been recent cardiac surgery or trauma; or if there is a suspicion of right ventricular infarction. 1. Radionuclide imaging, electron-beam computed tomography, or magnetic resonance imaging Can demonstrate areas of myocardial infarction and usually can determine whether they are acute or remote Note: Echocardiography is often performed to assess the function of the right and left ventricles, as well as to detect the 10-20% incidence of cardiac-wall clots that alter clinical management.
Venography Traditional “gold standard” that can demonstrate the conclusive finding of a persistent filling defect within the lumen of a vein. Other findings that are highly suggestive of DVT include abrupt termination of the contrast column within a vein, inability to opacify a major vein, and the formation of extensive collateral venous circulation Note: See “ Pulmonary Embolism”. Superior Vena Cava Syndrome Presenting Signs and Symptoms Progressive dilatation of the veins of the head and upper extremities Edema and plethora of the face, neck, and upper torso Cyanosis and conjunctival edema Dizziness, syncope, headache Respiratory distress (due to airway edema) Note: If the obstruction occurs slowly, the formation of a compensatory collateral venous network may prevent the development of clinical symptoms.