To promote understanding and improve diagnostic level of Rathke′s cysts with CT and MRI,crosscheck analysis was performed between CT,MRI and operative pathology was done in 6 cases.Results: It was misdiagnosed as cranio pharyngioma,hypophysoma and cholesteatoma in CT and MRI before operation.Oval and irregular cystic low density was showed in CT in 4,oval iso density and higher density in 1,respectively,and line like reinforcement of the cystal wall in 2 after intensification.Oval and oval like low signals were showed in 3 and isosignals in 1 on T 1 weighted images of MRI and high signals with clear edge on T 2 weighted images.It suggested that the diagnostic value of MRI was superior to that of CT in Rathke′s cysts.

To improve the diagnostic level of CT and MRI in intracranial angioreticuloma. 75 cases of intracranial angioreticuloma were examined by CT, and 19 of them were re examined with MRI. The tumor was located in the cerebellum in 67, frontal lobe in 2, temporal lobe in 1, cerebellum with involvement of medulla, great occipital foramen, vertebral canal, spinal cord and cerebropontial angle in 1, respectively. CT displayed cystic low density accompanied by tumor wall nodules (midcystic tumor) in 35, cystic low density in 18, circular cystic wall in 11, parenchymatous high density in 4, and mixed density in 6. Long T 1 and T 2 signals with tumor wall nodules were displayed in MRI in all of 12 patients. Postoperative pathology: 47 were cystic tumors with tumor wall nodules in the size of 0 1～3 0cm in diameter. The tumor was solitary in 71 cases, and multiple is 3, and the mixed tumor of glioblastoma multiforme and multiple angioreticuloma was located in the temporal lobe in 1 patient, which was rare. The tumor should be diagnosed as angioreticuloma when it was located in the cerebellar hemisphere or vermis without the feature of midcystic tumor or parenchymatous tumor in CT and MRI profiles, with the features of obvious reinforcement or paramagnetic vascular empty in tumor, and a short history.

Objective To study the correlation of supratentorial gliomas and ependymoma between the features of pathology and the characteristic of CT,MRI and provide relevant data for diagnosis and treatment.Methods We analysised 60 patients with gliomas and 40 with ependymoma,contrasted their characteristic of CT,MRI with the features of pathology.Results The feature of irregular appearance,lobulation,tumor wall,tumor tubercle,necrotic cystiform zone,hemorrhage and tumor blood vessels were showed in CT and MRI,which was accord with the alteration of ultrastructure and the expression of tumous label.Conclusion Studying the morphology of supratentorial gliomas and ependymoma may be helpful to raise the veracity of pathologic grading,provide evidence to select treatment,operation and anti-vasoformation of the tumor etc.

Both dosage and volume of local anesthetics taken for extradural anesthesia in ESWL were studied in 112 cases. The results showed that small dose of coxylacaine (1.33% of xylocaine and 0.16% Bupivacaine in 3-5ml) given extradurally is not only safe but also suitable for ESWL without obvious side effect

Objective:To compare radiation dose between digital breast tomosynthesis (DBT) and full-field digital mammography (FFDM), and explore the correlation of average glandular dose(AGD) with breast density and compression thickness.Methods:The mammographic data of patients with breast diseases who underwent digital breast tomosynthesis (DBT) and the population who underwent full-field digital mammography (FFDM) screening in the First Affiliated Hospital of Kunming Medical University from October 2020 to May 2022 were retrospectively collected. The compression thickness, compression force and AGD were recorded. According to the 2013 ACR BI-RADS MAMMOGRAPHY, the breast gland density was classified into 4 types: a(glandular tissue<25%), b(glandular tissue 25%~50%), c(glandular tissue 50%~75%) and d(glandular tissue >75%), by two senior doctors engaged in breast imaging diagnosis. The relationships between different gland densities, different compression thicknesses and AGD under FFDM and DBT mode were analyzed.Results:In both FFDM and DBT modes, the AGD increased significantly with the increase of breast density( F=861.63, 617.83, 330.33, 451.45, 290.47, P<0.001), and AGD a