Multidetector CT is the imaging method of choice for evaluation of pancreatitis and competes with magnetic resonance imaging (MRI) for detection and staging of pancreatic tumors. Rapid CT acquisition times allow high-resolution multiphase scanning of the entire pancreas within a…
Biliary Tree Primary imaging of the biliary tree depends increasingly on CT, ultrasonography, magnetic resonance imaging, and magnetic resonance cholangiopancreatography, and with diminishing reliance on invasive endoscopic retrograde cholangiopancreatography. Multidetector CT (MDCT) with thin sections and multiplanar reformats can clearly…
Anatomy In 2000 the Terminology Committee of the International Hepato-Pancreato-Biliary Association refined the accepted terminology of hepatic anatomy and liver resections. The international classification system divides the liver into eight independent segments (Couinaud [pronounced “kwee-NO”] segments) ( Fig. 11.1 ,…
Multidetector CT (MDCT) is the imaging method of choice for the diagnosis of intra-abdominal injury following blunt abdominal trauma. Treatment is directed by characterization of the precise nature of the injury, or by the reliable demonstration of the absence of…
Peritoneal Cavity Anatomy The various recesses and spaces of the peritoneal cavity are easiest to recognize on CT when ascites is present. Identifying the precise compartment that an abnormality is in goes a long way toward identifying the nature of…
Despite marked advances in limiting image times for magnetic resonance imaging, CT remains the primary modality for most indications for imaging the abdomen and pelvis. The technology of multidetector CT (MDCT) scanners continues to advance, with progressive increases in the…
Technical Considerations In general, the pleura and chest wall are adequately evaluated with routine thoracic CT techniques. Contrast medium infusion is helpful in showing pleural thickening and in allowing its differentiation from pleural fluid. Soft-tissue window settings and bone windows…
On CT, normal lung varies in appearance, depending on the window settings used. With a window mean of –600 to –700 Hounsfield units (HU) and a width of 1000 to 1500 HU, the lungs appear dark, but not as black…
CT is helpful in the diagnosis of endobronchial lesions, hilar and parahilar masses, and hilar vascular lesions. Technique In most patients the hila are adequately assessed with spiral CT with a 5-mm slice thickness (it takes about 15 contiguous 5-mm…
Lymph Node Groups Mediastinal lymph nodes are generally classified by location. Most descriptive systems are based on a modification of Rouvière’s classification of lymph node groups. The names used in describing lymph nodes groups for the purpose of lung cancer…