Abstract
In 1972, EMI introduced the first CT scanner into clinical practice. This unit was specifically engineered to image the brain. The total scan time was approximately 25 min, and produced five images displayed with an 80x80 matrix. These CT scanners, now referred to as conventional CT scanners, involve alternating patient exposure and patient translation (Brink 1995). In this scanner, the X-ray tube and the detector array move in a 360° circle around the stationary table and patient. Currently, it takes approximately 1 s to rotate the tube 360° around the patient and another second to move the patient to the next Z-axis position. Therefore, the scanning efficiency of this system is about 50% (Hu 1998). With conventional CT, a slice thickness and gap between slices are chosen. Furthermore, to increase Z-axis coverage, the slice collimation or interslice gap need to be increased with resultant loss of Z-axis resolution. While conventional CT revolutionized the way medicine was practiced, it is rapidly becoming obsolete.
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© 2002 Springer-Verlag Berlin Heidelberg
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Macari, M., Israel, G. (2002). CT Image Acquisition: from Single Slice to Multislice. In: Caramella, D., Bartolozzi, C. (eds) 3D Image Processing. Medical Radiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59438-0_2
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DOI: https://doi.org/10.1007/978-3-642-59438-0_2
Publisher Name: Springer, Berlin, Heidelberg
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