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Bone cement X‐ray contrast media: A clinically relevant method of measuring their efficacy
Author(s) -
Kjellson F.,
Almén T.,
Tanner K.E.,
McCarthy I.D.,
Lidgren L.
Publication year - 2004
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30060
Subject(s) - contrast (vision) , cement , bone cement , materials science , medicine , biomedical engineering , nuclear medicine , dentistry , computer science , composite material , artificial intelligence
It is important to compare different contrast media used in bone cement according to their ability to attenuate X‐rays and thereby produce image contrast between bone cement and its surroundings in clinical applications. The radiopacity of bone cement is often evaluated by making radiographs of cement in air at an X‐ray tube voltage of 40 kV. We have developed a method for ranking contrast media in bone cement simulating the clinical situation, by (1) choosing the same X‐ray tube voltage as used in clinical work, and (2) using a water phantom to imitate the effects of the patients' soft tissue on the X‐ray photons. In clinical work it is desirable to have low radiation dose, but high image contrast. The voltage chosen is a compromise, because both dose and image contrast decrease with higher voltage. Three contrast media (ZrO 2 , BaSO 4 , and Iodixanol) have been compared for degree of “image contrast.” Comparing 10 wt % contrast media samples at an X‐ray tube voltage of 40 kV, ZrO 2 produced higher image contrast than the other media. However, at 80 kV, using a water phantom, the results were reversed , ZrO 2 produced lower image contrast than both BaSO 4 and Iodixanol. We conclude that evaluations of contrast media should be made with voltages and phantoms imitating the clinical application. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 70B: 354–361, 2004