Stroke and Its Imaging Evaluation
Fig. 18.1 Acute infarct. Diffusion-weighted images showing acute lacunar infarct (arrow) in posterior limb of right internal capsule Less common etiologies, representing less than 5 % of acute stroke, include…
Imaging of Acute Colonic Disorders
Fig. 6.1 Acute diverticulitis (a–c) Contrast-enhanced CT scan study of the abdomen demonstrates inflamed diverticulum (arrowheads) arising from the ascending colon. There are pericolonic inflammatory changes seen around the inflamed…
Imaging of Acute Head Emergencies
Fig. 16.1 (a, b) Cerebral edema. Noncontrast axial CT image of the brain shows diffuse hypodensity in the brain parenchyma, with loss of the gray-white interface compatible with brain edema….
Emergencies of the Biliary Tract
Fig. 2.1 Imaging appearance of gallstones on plain radiograph and ultrasound. (a) Plain radiograph demonstrates laminated radiopaque gallstones in the right upper quadrant. Up to a fifth of the gallstones…
Imaging of Facial Fractures
Fig. 17.1 Normal CT anatomy and facial buttresses. (a) 3D surface-rendered image demonstrating the four vertical and four transverse buttresses (1 medial maxillary, 2 lateral maxillary, 3 upper transverse maxillary,…
Imaging of Blunt and Penetrating Abdominal Trauma
Grade Description I Hematoma: subcapsular, <10 % surface area Laceration: capsular tear, <1 cm in parenchymal depth II Hematoma: subcapsular, 10–50 % surface area; intraparenchymal, <10 cm in diameter Laceration:…
Imaging of Small Bowel
Fig. 4.1 Duodenal diverticulum. Upper GI study demonstrates an incidentally detected solitary duodenal diverticulum arising from the third portion of the duodenum Fig. 4.2 Small bowel diverticulosis. (a) Small bowel…
Imaging of Acute Pancreas
CT finding CT grade Score Normal pancreas A 0 Focal or diffuse enlargement of the pancreas B 1 Inflammatory changes in peripancreatic fat C 2 Single fluid collection D 3…
Acute Appendicitis
Fig. 3.1 Normal anatomy of the appendix on barium enema and CT. Coronal CT reformation of the abdomen demonstrates normal air-filled appendix (curved arrow) medial to the cecum. Normal appendiceal…
Emergency Radionuclide Imaging of the Thorax and Abdomen
Clinical indication Examination Radiopharmaceuticals Typical time to completion Sensitivity Specificity Positive predictive value Negative predictive value References Acute pulmonary embolism V/Q lung scintigraphy Ventilation: 133Xe gas, inhaled, or 99mTc DTPA…
