Computed tomography exposes patients to higher radiation levels than most other imaging techniques. This article describes factors that affect radiation dose in CT, how CT dose is measured and methods to reduce the dose to patients and health care professionals.

Humans↗

PubMedDate not supplied

Computed tomography: an overview.

Instrumentation for computed tomography (CT) can be put into three categories that are defined in this article. The basis for this categorization depends on the number of detectors and the type of scanning mode used by each. The goal of each generation scanner is to provide a measurement of x-ray absorption coefficients of cross-sectional portions of the anatomy. The technology of each generation is also presented.

Tomography, X-Ray Computed↗

PubMedDate not supplied

3-D imaging: basic concepts for radiologic technologists.

This article describes the physical principles and clinical applications of three-dimensional imaging in diagnostic radiology. It explores the history of 3-D imaging in medicine and reviews basic 3-D concepts. In addition, it discusses the technical aspects of medical 3-D imaging, including data sources, creation of 3-D space and rendering techniques. The article concludes with an overview of the clinical applications of 3-D imaging in computed tomography and magnetic resonance imaging, as well as a commentary on the future of 3-D imaging in radiology.

Humans↗