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The Journal of Nuclear Medicine Vol. 35 No. 5 851-854
© 1994 by Society of Nuclear Medicine
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Radionuclide Arthrography and Transmission Imaging for Assessment of Painful Hip Prostheses

Anthony A. Hayes and Geoffrey D. Bower

Isotope Imaging, Surgicentre, South Perth, Australia

Correspondence: For correspondence contact: Dr. Anthony Hayes, Isotope Imaging, Suite 2, Surgicentre, Ranelagh Crescent, South Perth, Western Australia 6151.

ABSTRACT

Interpretation of the radionuclide hip arthrogram may present difficulty because of a lack of anatomical reference information. Additional transmission images to determine tracer localization may facilitate scan interpretation. Methods: Isotope arthrography (20 MBq 99mTc-tin colloid and 57Co transmission imaging) was prospectively performed on 21 patients with painful hip prostheses and suspected stem loosening. Results: The radionuclide arthrogram was positive in 10 patients and negative in 9 patients. Extravasation of tracer, confirmed by transmission images, resulted in two nondiagnostic studies. Surgery was undertaken in 10 patients and loosening was confirmed in 6 patients. In this surgical subgroup, the scan was true-positive in six patients, true-negative in two patients, false-positive in one patient and nondiagnostic in one patient. Conclusions: The combination of radionuclide arthrography and transmission imaging facilitates scan interpretation and is a recommended method for investigating suspected loosening of the femoral stem.

Key Words: hip prosthesis loosening • radionuclide arthrogram • transmission imaging






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Copyright © 1994 by the Society of Nuclear Medicine.