TextureanalysisofdifferentiatingbreastfibroadenomafrominvasiveductalcarcinomaonDCEGMRI / 实用放射学杂志

Objective ToassessthediagnosticvalueoftextureanalysisofDCEGMRIindifferentialofbreastfibroadenoma(FA) andinvasiveductalcarcinoma(IDC).Methods TheMRIdataof51patients(21breastFA,30IDC)confirmedbysurgicalpathology wereretrospectivelystudied.6texturefeaturesoftheDCE metricparameters,includingforwardGvolumetransfercontrant(Ktrans)、reverse volumetransferconstant(Kep)andextravascularextracellularspacevolumefraction(Ve),weregeneratedfrom manuallyselected ROIofthelesions.ROCcurveoftextureparameterswereusedindifferentialdiagnosisofFAandIDC.Results Significantdifferences werefoundbetweenFAandIDCforallDCEGMRImetricsexceptforKepkurtosis,Veenergy,entropy,andkurtosis.Themeanvalueof Ktrans、KepandVe were0.79、0.92、0.73,respectively.Conclusion ThehistogramtexturecharacteristicsontheDCEquantitativeparameterof FAandIDChavesignificantlydifferences.HistogramtextureanalysisofDCEGMRIdemonstratestheabilityofdifferentiatingFA fromIDC,andprovidesreliableresultsforclinicaldiagnosis,whichishelpfulforthechoiceofclinicaltreatment.

Role of short-term follow-up MRI in the detection of postoperative breast residual cancer / 实用放射学杂志

Objective To evaluate the role of short-term follow-up MRI in the detection of postoperative breast residual cancer. Methods A retrospective analysis was performed on 13 patients who were diagnosed as nonmalignant breast lesions by preoperative clinical and ultrasound and mammography examinations and intraoperative frozen pathology.However,these patients were finally confirmed as malignant breast lesions by paraffin pathology and received corresponding second operations.Routine MRI,DCE-MRI and EPI-DWI scan were performed on the 13 patients within one month after the first operation and these MRI features and patholo-gy were comparatively analyzed.Results All the cases showed local mammary architecture distortion both in routine MRI and DCE-MRI.The enhancement characteristics of the 13 cases were as follows:3 cases of stippled enhancement,4 cases of small nodular en-hancement,1 dendritic enhancement,1 network enhancement,1 ring-like enhancement of cystic wall and 3 cases of no abnormal en-hancement.The lesions of 7 cases showed type Ⅰ curve (progressive enhancement pattern)and 6 cases showed type Ⅱ curve (plat-eau pattern).The lesions of 6 cases showed decreased ADC value.In summary,there were 6 cases of tumor residue diagnosed by both MRI and the second pathology,while only 1 case of residual neuroendocrine carcinoma was misdiagnosed by MRI but confirmed by the second pathology.Conclusion Short-term follow-up MRI could be of value in determining postoperative breast residual tumor, and could be helpful for surgeons to make accurate operation plan.

Analysis of Imaging and Clinical Findings of Severe Adenoviral Pneumonia in Children / 实用放射学杂志

Objective To investigate imaging and clinical findings of severe adenoviral pneumonia in children.Methods The imaging and clinical findings of severe adenoviral pneumonia in three children were retrospectively analyzed. All cases underwent radiography and CT examinations of chest. Results Two patiens showed fairly homogeneous opacity with air bronchograms in segmental or lobar distribution in left lung,in company with volume decreased in one case. There was interstitial change in 1 case,pleural effusion in one case and heart shadow enlarged in 3 cases. All of patients had cough and fever (range,38.4℃～40.3℃). Physical examinations showed decreased breathing sound and crackles in all cases. Laboratory findings included abnormally elevated aspartate aminotransferase,lactic dehydrogenase, hydroxybutyric dehydrogenase and creatine kinase and positive adenovirus examination in all cases. Conclusion Lobar pneumonia in company with liver and heart dysfunction should be suspected as the severe adenoviral pneumonia in children.

Mammographic Findings of Non-puerperal Breast Abscess / 实用放射学杂志

Objective To improve the diagnostic accuracy of non-puerperal breast abscess.Methods The mammographic findings of non-puerperal breast abscess in 10 cases were retrospectively reviewed and analyzed.Results The following X-ray signs of this disease were found on mammograms:(1)acute abscess:it showed irregular compact lesions with unclear boundary and no any structures in centre of lesion(5 cases),or mass lesion with hyper density and blurred boundary(1 case),skin edema (3 cases).(2)chronic abscess:it showed round or roundlike mass with sharp and clear boundary(2 cases),irregular long or short burr around the mass (2 cases),subabcesses(2 cases),skin thicken(2 cases) fistula (1 case).Conclusion The accuracy of diagnosing non-puerperal breast abscess can be improved by the combination of X-ray signs and clinical information.

Imaging Features of Primary Mediastinal Cysts / 实用放射学杂志

Objective To study the imaging features of primary mediastinal cysts,and to improve the diagnostic ability of these diseases.Methods The imaging findings of primary mediastinal cysts proved by pathlolgy in 42 cases were retrospectively.All of cases underwent posteroanterior and lateral views of chest.The plain and contrast-enhanced CT scans were performed in 28 and 15 cases.MRI examination was done in 6 cases.The location,size,shape,density,edge,wall and adjacent structures of the primary mediastinal cysts were observed.According to imaging features all of cases was divided into typical group and atypical group.Results The mediastinal cysts were located in anterior mediastinum in 28 cases,in middle mediastinum in 7 cases,in posterior mediastinum in 7cases.Bronchogenic cyst was in 9 cases.Cystic lymphangioma was in 4 cases.Thymic cyst was in 11 cases.Pericardial cyst was in 5 cases.Mature cystic teratoma was in 13 cases.The typical group was in 38 cases.The atypical group was in 4 cases.Conclusion 90% of the typical primary mediastinal cysts can be diagnosed.The final diagnosis of the atypical group desponds on pathology.

Mammographic and CT Diagnosis of Lipoma in the Breast / 实用放射学杂志

Objective To evaluate the value of mammography and CT in diagnosing lipoma of the breast. Methods X-ray mammographic and CT manifestations of lipoma in the breast confirmed by operation and pathology mainly in 8 cases were analyzed retrospectively. Results Lipomas were in the right breast in 6 cases and in the left breast in 2 cases.Lipomas were in shallow layers of breast in 3 cases,interglandular body in 2 cases and the posterior breast in 3 cases.All masses were radiolucency with well-defined edge.The calcification in lipoma could be observed in 1 case.The diameter of lesions ranged from 2 cm to 4.5 cm.Lipoma of the breast showed rounded or ege-shaped in 7 cases,lobulated in 1 case.Conclusion Lipoma of the breast can be identified by X-ray mammography and CT.

The Value of MR Diffusion-Weighted Imaging in Diagnosing the Benign and Malignant Breast Lesions / 实用放射学杂志

Objective To evaluate the value of diffusion-weighted imaging in distinguishing the benign and malignant breast lesions.Methods fifty-six female patients with pathologically proven breast lesions underwent MR diffusion-weighted imaging(MR-DWI)using 2 b values.The mean apparent diffusion coefficient(ADC)values and the relative ADC(rADC)values of lesions were measured and analyzed statistically by SPSS 13.0.Results(1)The mean ADC values of the malignant lesions and the benign lesions were(1.02?0.18)?10-3mm2/s and(1.61?0.32)?10-3mm2/s with b=500 s/mm2,(0.99?0.16)?10-3mm2/s and(1.59?0.33)?10-3mm2/s with b =1000 s/mm2,respectively.The mean ADC values of breast malignant lesions were lower significantly than that of the benign,and had statistical significance(P =0.001