New Phantoms For Measuring Low Contrast Resolution And Comparison Of Several CT Scanners When Using Them

E. Takenaka; T. A. Iinuma; M. Inoue

doi:10.1117/12.934516

1 November 1982 New Phantoms For Measuring Low Contrast Resolution And Comparison Of Several CT Scanners When Using Them

E. Takenaka, T. A. Iinuma, M. Inoue

Author Affiliations +

Proceedings Volume 0372, Physics and Engineering in Medical Imaging; (1982) https://doi.org/10.1117/12.934516
Event: International Workshop on Physics and Engineering in Medical Imaging, 1982, Pacific Grove, United States

Abstract

Measurements of low contrast resolution are most important. Xyron material .( stylene grafted poly-phenyl ether made by Asahi Medical Co.) can have an arbitrary CT number near to CT number of water. Phantoms with xyron-bar-in-water were made. But these phantoms showed different CT number between several CT scanners. They had energy dependency of CT number and were not suitable to measure low con-trast resolution. Then phantoms with xyron-bar-in-xyron were made. These phantomsshowed better differences between CT scanners than the former phantoms. These phantoms are most suitable to measure performance of low contrast resolution. CT number of xyron material decreases as X-ray tube voltage decreases. But differences of xyron bar contrast do not change so much.

Citation Download Citation

E. Takenaka, T. A. Iinuma, and M. Inoue "New Phantoms For Measuring Low Contrast Resolution And Comparison Of Several CT Scanners When Using Them", Proc. SPIE 0372, Physics and Engineering in Medical Imaging, (1 November 1982); https://doi.org/10.1117/12.934516

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