Reader performance in radiographic diagnosis of signs of mitral regurgitation in cavalier King Charles spaniels.

摘要: Objectives: To measure accuracy and variability of diagnosis by radiography heart enlargement (HE) failure (HF) in mitral regurgitation (MR). Methods: Sixteen readers representing four levels experience evaluated 50 sets radiographs with varying severity MR for presence or absence HE, left atrial (LAE) HF. The performance the was compared a reference standard, using area under curve (AUC) receiver operating characteristic (ROC) curves. interreader agreement value kappa (K) calculated. A subset difficult cases HF analysed before after removing an outlying reader from each group. Results: AUC HE 0·89, LAE it 0·93 0·92. Experience increased certainty but not accuracy. K ranges were 0·53 to 0·67; LAE, 0·61 0·69 HF, 0·49 0·58. When only read, decreased experienced performed better than inexperienced. excluded, differences between inexperienced increased. Clinical Significance: should be used evaluate size indirectly on radiographs. For among individual moderate. Studies consider effects variability.