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Comparison of 18‐ and 22‐MHz probes for the ultrasonographic diagnosis of giant cell arteritis
Author(s) -
Noumegni Steve Raoul,
Hoffmann Clément,
JousseJoulin Sandrine,
Cornec Divi,
Quentel Hugo,
DevauchellePensec Valérie,
Saraux Alain,
Bressollette Luc
Publication year - 2021
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.22986
Subject(s) - giant cell arteritis , medicine , halo sign , concordance , ultrasound , nuclear medicine , arteritis , kappa , radiology , sign (mathematics) , halo , cohen's kappa , pathology , vasculitis , physics , computed tomography , machine learning , galaxy , computer science , mathematical analysis , linguistics , philosophy , mathematics , disease , quantum mechanics
Purpose Little is known about the diagnostic concordance of images provided by ultrasound probes with emitting frequencies below or above 20 MHz for the diagnosis of giant cell arteritis (GCA). Methods We compared, using Cohen's kappa statistic, data obtained with an 18‐MHz and a 22‐MHz probe for the ultrasonographic evaluation of temporal arteries in 80 patients referred for suspected GCA. Results The halo sign was found in 25% of cases with the 18‐MHz probe and in 35% with the 22‐MHz probe. The compression sign was positive in 42% of cases with the 18‐MHz probe and 48% with the 22‐MHz probe. GCA was finally diagnosed in 20 patients (25%). The kappa coefficient of agreement was 0.76 ( P < .001) for the halo sign, and 0.75 ( P < .001) for the compression sign. Conclusions Images obtained by 18 MHz and 22‐MHz frequency probes showed a good level of agreement for the diagnosis of GCA, but the 22‐MHz probe yielded a correct diagnosis of GCA in 3 of the 7 patients in whom examination with the 18‐MHz probe was negative.