title: Prospective study of sequential technetium-99m phosphate and gallium imaging in painful hip prostheses (comparison of diagnostic modalities).
abstract: Twenty-two painful hip prostheses were studied prospectively with plain radiography, aspiration and arthrography, Tc-99m phosphate bone imaging, and gallium imaging to evaluate loosening, infection, or both and to compare the accuracy of these modalities. Fifteen prostheses were revised yielding 14 loose femoral and eight loose acetabular components. Five proved to have infected prostheses. Arthrograms, plain radiographs, and bone scans are highly sensitive in detecting loosening of the femoral component. This study confirmed a previous retrospective study in demonstrating that accuracy of diagnosis of an abnormal acetabular component using all four modalities is less than that for the femoral component. In infected prostheses, phosphate bone imaging showed high sensitivity of a pattern that accurately diagnosed all the infected cases, whereas gallium imaging missed one case.
authors.affiliation: Radiology Department, University of Miami School of Medicine, Florida 33101.
authors.forename: J
authors.initials: J
authors.lastname: Tehranzadeh
authors.forename: I
authors.initials: I
authors.lastname: Gubernick
authors.forename: D
authors.initials: D
authors.lastname: Blaha
mesh_terms: D000328:Adult; D000368:Aged; D001175:Arthrography; D001424:Bacterial Infections / Q000150:complications / Q000000981:diagnostic imaging; D005260:Female; D005710:Gallium Radioisotopes; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology*; D010710:Phosphates; D011446:Prospective Studies; D011475:Prosthesis Failure; D011877:Radionuclide Imaging; D013667:Technetium; D017556:Technetium Compounds
chemical_list: D005710:Gallium Radioisotopes; D010710:Phosphates; D017556:Technetium Compounds; C046451:technetium Tc 99m phosphate; D013667:Technetium