Objective To evaluate the value of CT in diagnosis of adnexal abscess retrospectively.Methods The characteristic CT findings in 26 patients with adnexal abscess proved by histopathology were reviewed retrospectively.Results Of 26 patients,the adnexal abscess was presented in unilateral lesions(n=6) and bilateral lesions(n=20).There were total 46 lesions,which were pyosalpingitis (n=33) and tubo-ovarian abscess (n=13),respectively.CT findings of pyosalpingitis included dilated, thick-walled, enhancing fallopian tubes containing complex fluid.CT findings in tubo-ovarian abscess were thick-walled and multiloculated cystic masses,which had thick mural enhancement with multilayered appearance (n=10).Reactive inflammation of adjacent structures(n=21) manifested as haziness and stranding of the pelvic fat,thickening of the uterosacral ligaments, and pelvic peritonitis.Small or large bowel ileus (n=5) and hydroureter (n=3) resulted from adjacent inflammation of tubo-ovarian abscess.Endometritis was seen in 19 patients and ascites in 18 patients.Conclusion Familiarity with the CT appearances is important for timely diagnosis and treatment of adnexal abscess and its complications.

Purpose To discuss the value of MRI in the diagnosis of placenta implantation abnormality, and to explore preliminarily the relationship between MRI signs and types of placenta implantation abnormality. Materials and Methods The clinical preoperative data and postnatal pathological findings of 54 women at high risk of placenta accreta were collected. All the patients undertook the conventional pelvic MRI examination. The scanning sequences mainly included: sagittal, coronal and axial T2-weighted imaging-turbo spin echo, balance fast field echo. The MRI images were observed and the areas which showed low signal in all the three directions on T2WI were measured. Then the correlation between the areas of low signal on T2WI in placental and the types of placenta implantation abnormality was analyzed. Results The incidence of placenta implantation abnormality was 64.8% in our research (35/54). The main MRI signs were low signal on T2WI (68.5%, 37/54) and heterogeneous signal in placenta (57.4%, 31/54); the main sign of placenta percreta was tenting bladder (75.0%, 6/8). The types of placenta implantation abnormality were positively correlated with the areas of low signal on T2WI (r=0.454, P<0.05). Conclusion Pregnant women at risk of placenta accreta should be evaluated with imaging examinations, particularly with MRI scanning, to improve disease detection rate. The typical indirect signs of placenta implantation abnormality are low signal on T2WI and heterogeneous signal in placenta. The larger size of low signal area on T2WI in placenta, the deeper implantation of placenta.

Objective To investigate the protective effects on the renal allografts from brain dead (BD) donor rats pretreated with bone marrow mesenchymal stem cells (MSCs).Method Three groups [normal transplant group (G1).BD transplant group (G2),and MSCs pretreated + BD transplant group (G3)] were set up.Male F344 rats served as donors and male Lewis rats as recipients.In G1,kidneys from F344 donor rats were implanted into Lewis recipients.In G2,kidneys from F344 BD donor rats were engrafted into Lewis recipients.In G3,after BD was established in F344 rats,MSCs were given intravenously to the rats.The kidneys harvested 6 h later were transplanted to Lewis recipients.Cyclosporine was intromuscularly given daily to the recipient rats for 10 days.Right kidneys were resected from recipients on day 10.Creatinine level was examined on day 14,21,28,and 35.Renal allografts harvested on day 35 were pathologically detected.The irnmunochemistry expression of interleukin (IL)-1β and tumor necrotic factor (TNF)-α in renal allograft tissue was tested.Result Serum creatinine levels in G2 were remarkably higher than those in G1 and G3 (P＜0.01) on day 14,21,28,and 35 postoperatively.The creatinine levels on the above mentioned time points had no statistically significant difference between G3 and G1 except on day 21.Postoperative pathological changes in G2 of both pronounced infiltration of mononuclear cells and tubular epithelia[inflammation were notably increased in renal allografts as compared with those in G1 and G3.There was no obvious difference between G1 and G3 in infiltrated mononuclear cells and tubular epithelial inflammation.Positive expression levels of both IL-1β and TNF-α in glomerular,tubular and interstitial epithelial cells were statistically enhanced in G2 as compared with those in G1 and G3 (H =7.210,P =0.027),while there was no statistically significant difference in the expression of both IL-1[β and TNF-α between G1 and G3.Conclusion Brain dead donor rats pretreated with bone marrow MSCs might reduce renal allograft injury via decreasing both inflammatory cell infiltration and IL-1β and TNF-α expression.

Objective: To observe the value of amide proton transfer weighted (APTw) imaging in predicting isocitrate dehydrogenase (IDH) wild type and IDH mutant of high-grade gliomas. Methods: Twenty-five patients with pathologically confirmed high-grade gliomas were enrolled. All patients underwent preoperative MR scanning, including routine sequences, T1WI enhancement and APTw scanning. According to the pathology, the patients were divided into IDH wild type group and IDH mutant group. ROIs were placed on FLAIR images of all tumor layers to select the solid components of the tumor, and APT values of each layer were obtained to get the mean value. Differences of APT values were analyzed between groups using independent sample t test, and ROC curve analysis was performed to evaluate the diagnostic efficacy of APT values in assessing the gene status of IDH. Results: Among 25 patients of high-grade gliomas, 9 cases were IDH mutant and 16 cases were IDH wild type. APT value of IDH wild type group ([3.21±0.82]%) was significantly higher than that of IDH mutant group ([2.23±0.72]%; t=2.89, P<0.05), and the AUC was 0.84 (P<0.05). The sensitivity and specificity of IDH wild type diagnosis was 93.8% and 66.7%, respectively. Conclusion: APTw imaging can be used to predict gene status of IDH in high-grade gliomas.

Objective To demonstrate that MRI is more advantageous than ultrasound in the detection of ischemic cerebral lesions precisely in twin-twin transfusion syndrome(TTTS)fetus following fetoscopic selective laser coagulation(SLCPV).Methods The fetus with TTTS treated by SLCPV were collected.All fetuses underwent brain MRI within 1-5 days after the procedure and a follow-up MRI at 29-32 weeks'gestation.All fetuses also had frequent ultrasound evaluation until delivery.Results Twenty-five pregnancies with TTTS were included in the study.Six pregnancies resulted in survival of only one twin after the procedure(Group A),while the other 19 pregnancies resulted in the survival of both twins(Group B),as assessed at the time of initial MRI.Two fetus in Group A and three in Group B had evidence of bleeding in lateral ventricle.Two fetus in Group B had actue brain ischemia.One fetus in Group B had appeared brain atrophy and choosed to terminate pregnancy.Conclusion MRI can make a clearer diagnosis of cerebral damage of TTTS fetus in a short period after SLCPV.

With the continuous application of high-technology in the clinical practice,the privacy of patient is infringed or leaked during the process of imaging medical examination and teaching or because of improper management of hospital.The main reasons include that relative laws and regulations are inadequate,patients don't understand the scope of privacy rights and medical technicians lack knowledge of medical ethics.From the angle of medical ethics,this paper further discussed the protection of patients' privacy in imaging medical examination,so as to effectively reduce medical disputes in practical work and build a good doctor-patient relationship.

Improving the reproducibility of biomedical research results is a major challenge.Transparent and accurate reporting of the research process enables readers to evaluate the reliability of the research results and further explore the experiment by repeating it or building upon its findings. The ARRIVE 2.0 guidelines, released in 2019 by the UK National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3Rs), provide a checklist applicable to any in vivo animal research report. These guidelines aim to improve the standardization of experimental design, implementation, and reporting, as well as the reliability, repeatability, and clinical translatability of animal experimental results. The use of ARRIVE 2.0 guidelines not only enriches the details of animal experimental research reports, ensuring that information on animal experimental results is fully evaluated and utilized, but also enables readers to understand the content expressed by the author accurately and clearly, promoting the transparency and integrity of the fundamental research review process. At present, the ARRIVE 2.0 guidelines have been widely adopted by international biomedical journals. This article is a Chinese translation based on the best practices of international journals following the ARRIVE 2.0 guidelines in international journals, specifically for the complete interpretation of the ARRIVE 2.0 guidelines published in the PLoS Biology journal in 2020 (original text can be found at https://arriveguidelines.org). The fourth part of the article includes the items 1-5 of ARRIVE 2.0 Recommended 11 section, which covers "Abstract" "Background" "Objectives" "Ethical statement" and "Housing and husbandry". Its aim is to promote the full understanding and use of the ARRIVE 2.0 guidelines by domestic researchers, enhance the standardization of experimental animal research and reporting, and promote the high-quality development of experimental animal technology and comparative medicine research in China.

Many people affected by fragile X syndrome (FXS) and autism spectrum disorders have sensory processing deficits, such as hypersensitivity to auditory, tactile, and visual stimuli. Like FXS in humans, loss of Fmr1 in rodents also cause sensory, behavioral, and cognitive deficits. However, the neural mechanisms underlying sensory impairment, especially vision impairment, remain unclear. It remains elusive whether the visual processing deficits originate from corrupted inputs, impaired perception in the primary sensory cortex, or altered integration in the higher cortex, and there is no effective treatment. In this study, we used a genetic knockout mouse model (Fmr1^KO), in vivo imaging, and behavioral measurements to show that the loss of Fmr1 impaired signal processing in the primary visual cortex (V1). Specifically, Fmr1^KO mice showed enhanced responses to low-intensity stimuli but normal responses to high-intensity stimuli. This abnormality was accompanied by enhancements in local network connectivity in V1 microcircuits and increased dendritic complexity of V1 neurons. These effects were ameliorated by the acute application of GABA_A receptor activators, which enhanced the activity of inhibitory neurons, or by reintroducing Fmr1 gene expression in knockout V1 neurons in both juvenile and young-adult mice. Overall, V1 plays an important role in the visual abnormalities of Fmr1^KO mice and it could be possible to rescue the sensory disturbances in developed FXS and autism patients.
Animals ; Disease Models, Animal ; Fragile X Mental Retardation Protein/metabolism* ; Fragile X Syndrome/metabolism* ; Humans ; Mice ; Mice, Knockout ; Neurons/metabolism*