Objective:To sum up the x- ray signs of intestinal malrotation and to evaluate the means of examination. Methods:40 cases of intestinal malrotation in children aged from 1 hour to 16 years were reviewed. The diagnostic evaluations included 40 plain abdomen films,40 upper gastrointestinal barium series and 20 barium enemas. Results: Upper gastrointestinal obstruction was found on the plain film in 34 cases among which 4 showed abnormal position of jejunum. Duodenal obstruction was detected in 37 cases with gastrointestinal barium study among which 21 showed malposition of duodenojejunal junction and 16 showed "whorl" sing. Fifteen of twenty were found abnamal cecal position with barium enema examination. Conclusion :The malposition of duodenojejunal junction, "whorl" sign and abnormal cecal position are special signs of intestinal malrotation;The combination of the three x- ray examinations may be helpful in the diagnosis of intestinal malrotation.

Objective:To explore the relationship between the bone age and adolescent growth spurt(AGS),in order to establish a quantitative standard for determination of AGS of the children in Chongqing.Methods:Five hundred healthy children in Chongqing,aged from 7 to 16 years,were enrolled in this study.The bone ages were measured with CHN method in all children.Three phases of adolescent growth spurt were determined by Grave method in normal developing group.The range and median of the bone ages in every phase were analysed statistically by gender.Results:In Chongqing children,the accelerative phase of AGS started at 11.7 years for boys,and 9.5 for girls.The peak phase started at 14.2 years and 12.3 years for boys and girls respectively.The decelerative phase of AGS started at 15.9 years for boys and 14.8 years for girls.Conclusion:The assessment of bone ages provides a quantitative standard for determination of AGS,which is of help for orthopedists to determine the time of operation.

According to the characteristics of pediatric specialty,the teaching content of medical imageology was adjusted and optimized by blending with pediatric imaging.The purpose of the present study was to elevate the teaching efficiency and to cultivate medical talents with characteristics of pediatric specialty.

To study the mode of practice teaching in medical imageology,140 students from pediatric department and medical imageology department were surveyed.The results showed that the problem of out-of-date teaching mode existed in both departments,and the differences between pediatric and medical imageology department were that the latter have a more intensive need for more disease entity and such advanced contents as CT and MRI.In this paper,the causes of the problems mentioned above were analyzed and related strategies were put forward.

ObjectiveTo determine the role of low-field magnetic resonance angiography(MRA) in diagnosis of intracranial artery steno-occlusive disease in patients with cerebral infarction.Methods67 cases with cerebral infarction were given low-field MRA and DSA examination.Results62 cases of cerebral infarction MRA diagnosis and DSA agree,diagnostic accuracy was 92.5％.ConclusionLow-field MRA has a good reliability in diagnosis of intracranial artery steno-occlusive disease with the advantages of safe,reliable and convenient,can provide effective instruction for treatment of cerebral infarction.

Objective To determine the proportion and the clinical value of the thymus extending superiorly into the lower neck in children.Methods The MR images of 400 normal children were retrospectively reviewed.According to the childhood staging criteria.all children were divided into four groups:the infancy and toddlerhood group(0-3 yo,42),the pre-school age group(>3-6 yo,87),the school age group(>6-12 yo,168),and the adolescence group(>12-18 yo,103).The presence or absence of the superior extension of the thymus above the manubrium Was determined on sagittal T2-weighted images.If so,the distance between manubrium and thymic apex was measured.The associations between frequency of ccrvicaI extension and age and sex were evaluated using correlation analysis.Results Superior extension of the thymus was detected in 288(288/400,72.0%)children,with 39(39/42,92.9%)in the infancy and toddlerhood group,72(72/87,82.8%)in the pre-school age group,118(118/168,70.0%)in the school age group,and 59(59/103)in the adolescence group(57.3%).There Was a statistically significant relationship between age group and frequency of cervical extension of the thymus (X2=4.9684,P<0.05).There was no significant decreasing trend in the mean distance of cervical extension between age increasing groups(F=2.28,P>0.05).Conclusions Cervical extension of the thymus occurs in the majority of children,and should be considered as a normal finding.Through recognizing this finding,doctors can avoid misdiagnosing it as a pathologic mass.

Objective To investigate the diagnosis and differential diagnosis of renal and retroperitoneal tumors in children with CT.Methods CT findings in 189 cases of pathologically confirmed renal and retroperitoneal tumors,including nephroblastoma in 71 cases,neurogenic tumor in 89 cases(neuroblastoma in 70 cases,ganglioneuroblastoma in 2 cases and ganglioneuroma in 17 cases),teratoma in 18 cases and lymphoma in 11 cases,were retrospectively analyzed.Results CT showed that nephroblastoma was a round or oval encapsuled mass usually resulting in renal destruction,the residual kidney was a crescent-shaped encapsuled mass which is easy to lead to thrombosis of renal vein and inferior vena cava due to tumor.The manifestations of neuroblastoma were similar to those of ganglioneuroblastoma,usually with calcification and embed vessels,and could invade the kidneys and often metastasize to lymph nodes,cranium and brain,bones and liver.The ganglioneuroma was manifested as a small oval-shaped low dense mass in adrenal gland area or in paravertebral, with no exacerbation or slight exacerbation in its early stage.Lymphoma was located around the median line and presented as an irregular mass fused by multiple lymph nodes embedding the vessels loosely.Teratoma,usually occurred on one side of the retroperitonium,was characterized by calcification/ossification and fat tissue.Conclusion CT is of a higher value for the diagnosis and differential diagnosis of renal and retroperitoneal tumors in children.

0.05).The ideal body mass index of undernutrition and obesity prevalence was relatively high,while overweight rate was relatively low (P

【Objective】 To investigate the prevalence of hepatitis E virus (HEV) among voluntary blood donors, and the viability and practicability of nucleic acid testing (NAT) in Jinhua area. 【Methods】 Blood samples from 1 017 voluntary blood donors at Jinhua Blood Center from April to May 2021 were collected, and HEV RNA was detected by CHURAS BSS1200 blood nucleic acid detection system. The reactive samples were re-tested for IgM and IgG antibodies by ELISA, and HEV genotyping by gene sequencing. 【Results】 The yield rate of HEV RNA out of voluntary blood donors in Jinhua was 0.98 ‰ (1 / 017). The individual was negative for IgM and IgG antibodies, but was confirmed to be HEV RNA genotype 4 by sequencing. 【Conclusion】 HEV RNA positive donors have been found in this study. HEV RNA blood screening can effectively enhance the safety of blood transfusion.

Objective To explore the relationship between blood pressure and hemorrhagic cerebral infarction. Methods Retrospectively reviewed clinical data of 242 patients with acute cerebral infarction, then all patients with hemorrhagic cerebral infarction were selected. The distributions of different level of blood pressure (＞180/110mm Hg;90/70～180/110mm Hg;＜90/70mm Hg) were compared between the patients with or without hemorrhagic cerebral infarction, as the same, different prognosis were compared among the patients with hemorrhagic cerebral infarction based on the different level of blood pressure. Results Of the total patients with acute cerebral infarction,4. 1%(10) presented with blood pressure＜90/70mm Hg,88. 0%(213) with blood pressure 90/70～180/110mm Hg and 7.9%(19) with blood pressure＞180/110mm Hg. In all the patients,20 cases(8. 3%) with hemorrhagic cerebral infarction,among which,60.0%(12) patients with blood pressure＞180/110mm Hg and with 7 cases died, 10.0%(2) patients with blood pressure＜90/70mm Hg and with 1 case died,30.0%(6) patients with blood pressure 90/70～180/110mm Hg and with 2 cases died. The distribution of patients with blood pressure＞180/110mm Hg in those two type of cerebral infraction were statistically significant (P=0. 000) ,the ratio seemed higher in patients with hemorrhagic cerebral infarction, and among the patients with hemorrhagic cerebral infarction, the distribution of prognosis were the same statistically significant based on the diffetent level of blood pressure, among which, patients with blood pressure＞180/110mm Hg(P =0.041) or＜90/70mm Hg(P =0.037) seemed like to have a higher mortality. Conclusion Severe high blood pressure(＞180/110mm Hg) should be one of the high risk factors for patients with hemorrhagic cerebral infarction,when blood pressure＞180/110 mm Hg or ＜90/70mm Hg happened in the pathogenesis, patients always be with poor outcome. So, making proper control strategy of blood pressure for patients with hemorrhagic cerebral infarction was with significance to defend its' happening and prognosis' improvement.