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Introduction to CT of the Thorax: Chest CT Techniques

S piral (helical) computed tomography (CT) allows the entire chest to be imaged in a few seconds or less (i.e., during a single breath hold), with volumetric acquisition of scan data. Two- and three-dimensional reformations may be performed if desired. Because scanning is rapid, contrast agents can be injected quickly, excellent vascular opacification can be achieved, and reduced volumes of contrast agent can be used. Multidetector…

Patterns of Lung Disease

We have already seen how disease can consolidate or collapse a segment or lobe. We now look at other patterns of diffuse and focal lung disease. The lung reacts to disease in a limited number of ways. The interstitium can thicken or thin and the alveoli can fill with fluid or extra air. These changes may be focal or diffuse. They may be acute or chronic.…

Emergency Procedures for Spills of Radioactive Materials and Special Circumstances

Spills of Radioactive Materials Accidental spillage of radioactive material is rare; however, spills may occur in the laboratory, in public areas such as facility hallways, in elevators, or in any hospital room or ward through contamination by patient body fluids. Spill procedures should be posted in the restricted areas where radioactive materials are used or stored and should specifically state the names and telephone numbers of…

Sample Techniques for Nuclear Imaging

This appendix is provided as a guide to the technical aspects of various imaging procedures. Some of the less common procedures have not been included, and the procedures described herein may need to be adjusted, depending on the equipment available and user preferences. The protocols for positron emission tomography (PET) examinations are at the end of this appendix. Each nuclear medicine laboratory should have a standardized…