Reproducibility of image interpretation in immunoscintigraphy performed with indium-111- and iodine-131-labeled OC125 F(ab')2 antibody injected into the same patients.
An important criterion for the clinical use of a new imaging technique is the correct reproducibility of interpretation. Forty-six paired immunoscintigraphic examinations were performed on 43 patients with suspected ovarian carcinoma recurrence using F(ab')2 fragments of OC125 antibody labeled first with indium-111 and then with iodine-131. Planar scintigraphy (PS) and emission computed tomography (ECT) images were interpreted blindly and separately by three observers, and reproducibility was evaluated by a kappa concordance index. Intra- and interobserver reproducibility were generally satisfactory (kappa values of 0.6 and 0.7, respectively). Binomial analysis of kappa values for ECT showed the superiority of indium-111 for intraobserver (p = 0.035) and interobserver (p = 0.0039) study. However, for PS there was no significant difference in reproducibility with the two radionuclides.
Vuillez
J P
JP
Centre René Gauducheau, Nantes, France.
Peltier
P
P
Mayer
J C
JC
Dubois
F
F
Chetanneau
A
A
Fumoleau
P
P
Bertrand
A
A
Chatal
J F
JF
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D015295:Antigens, Tumor-Associated, Carbohydrate / Q000276:immunology; D005260:Female; D006801:Humans; D007205:Indium Radioisotopes; D007457:Iodine Radioisotopes; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000000981:diagnostic imaging* / Q000276:immunology; D015588:Observer Variation; D010051:Ovarian Neoplasms / Q000000981:diagnostic imaging* / Q000276:immunology; D015203:Reproducibility of Results; D014055:Tomography, Emission-Computed
D000911:Antibodies, Monoclonal; D015295:Antigens, Tumor-Associated, Carbohydrate; D007205:Indium Radioisotopes; D007457:Iodine Radioisotopes