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Objective To investigate the value of diffusion kurtosis imaging (DKI) in differential diagnosis of parotid gland disease and diagnosis of parotid adenolymphoma (PAL).Methods DKI and DWI data of 57 patients with parotid gland disease were etrospectively analyzed.Totally 57 cases were divided into infectious lesions group (n=10),pleomorphic adenoma group (n=19),PAL group (n=14),other benign parotid tumor group (n=4) and malignant parotid tumor group (n=10).Contralateral normal parotid glands in 19 patients with unilateral parotid gland lesions were treated as control group.The quantitative parameters including kurtosis concerning parameters (K Krad,Kax),diffusivity concerning parameters (D Drad,Dax),fractional anisotropy (FA) and conventional apparent diffusion coefficient (ADC) values were retrospectively reviewed.The binary Logistic regression method was used to confirm parameters with significant difference in diagnosing PAL.And Logistic regression equation was constructed to diagnose PAL.ROC analysis was conducted to evaluate the diagnostic value of the confirmed parameters and the Logistic regression equation.Results Significant difference of the parameters including K Krad,Kax,D Drad,Dax,FA and ADC values were found among different groups (all P＜0.05).ROC analysis demonstrated a higher area under the curve (AUC) for FA+Kax [0.88±0.06 (0.79-0.94)] than Kax[0.80±0.07 (0.70-0.88)] and FA [0.63±0.10 (0.52-0.73)],respectively (both P＜0.05).The sensitivity,specificity,accuracy,positive predictive value and negative predictive value was 71.43％,95.78％,91.77％,76.92％ and 94.44％.Conclusion DKI showed high diagnostic capacity in differential diagnosis of parotid gland disease.The combination of FA and Kaxcan improve the diagnostic accuracy in diagnosis of PAL.
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Objective To evaluate CTA characteristics of anomalous origin of coronary artery from the pulmonary artery (ACAPA).Methods The clinical data of 24 patients with ACAPA were retrospectively analyzed,and the results of CTA were compared with operation.Results In 24 ACAPA cases,20 cases (20/24,83.33％) occurred in the left coronary artery (LCA),1 case (1/24,4.17％) was in the right coronary artery (RCA),1 case (1/24,4.17％) was in the anterior descending artery (LAD) and 2 cases (2/24,8.33 ％) were in the circumflex artery (LCX).The origins of coronary anomalies originated from the posterior wall of the pulmonary sinus or pulmonary trunk in 11 cases (11/24,45.83 ％),left wall in 7 cases (7/24,29.17％),right wall in 4 cases (4/24,16.67％),originated in the left pulmonary artery in 2 cases (2/24,8.33％).Collateral circulation:Infant type was in 5 cases,no collateral vessels between the coronary artery was observed;adult type was in 19 cases,of which 16 cases were of abnormal origin of the LCA and RCA,1 case was of LAD,2 cases were of LCX.The double LAD and coronary arteries with an intramural segment were found in 1 case respectively.Surgery were performed in 19 cases.Five cases were reviewed by CTA,1 case with anastomotic stenosis of LCX,1 case with restenosis of right ventricular outflow tract and 1 case with coronary pseudoaneurysm.Conclusion CTA can clearly show the origin of abnormal coronary artery,the distance from the ascending aorta,collateral vessels,combined with other coronary artery malformations,which can help surgical preparation of preoperative surgical approach,and postoperative follow-up.
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PurposeTo study the MRI and pathological features of ovarian endometrioid adenocarcinoma (OEC) in order to evaluate the value of MRI in diagnosing OEC. Materials and Methods The MRI imaging features of 8 patients confirmed by surgery and pathology were analyzed retrospectively and were compared with the results of surgery and pathology. The MRI outcome and the related histological findings were further analyzed.Results Six out of the eight patients had unilateral tumor, 3 tumors in the left and the other 3 in the right; 2 patients had masses in the both ovaries. The total number of masses was ten.The diameters of the tumors ranged from 3.5 to 16.5 cm, with the average size of (10.5±4.1) cm. The border of 2 tumors was partially fuzzy and that of the other 6 was clear. The MRI scans showed that 8 tumors were cystic-solid and the other 2 were solid with heterogeneous signals. The solid components mainly presented slightly short T1 signals and long T2 signals; the cystic ones revealed long T1 and T2 signals. The enhanced scanning showed that the solid components of 8 tumors were patchy and obviously enhanced and the other 2 had mild or moderate enhancement. The cystic components were not hyper-intense. The enhanced MRI scans of two cases of primary endometrial carcinoma with metastases to the ovaries showed thickened endometrium and mild hyper-intense.Conclusion MRI can reveal the pathological features of OEC and clearly presents the forms, components and the relationship with its surroundings of tumors. Therefore, MRI is of great importance to the clinical diagnosis of OEC.