Objective To compare the clinical value of fluid attenuated inversion recovery imaging (FLAIR),magnetic resonance diffusion-weighted imaging(DWI) and magnetic resonance angiography(MRA) in diagnosis of early cerebral infarction.Methods 70 cerebral infarction patients were chosen.They underwent FLAIR,DWI and MRA examination.Results 70 patients with early cerebral infarction mostly were multiple lessions accouting for 60％.Supper actue period had 22 cases and acute period had 48 cases.DWI had the highest detection rate of cerebral infarction,particularly in the hyperacute period the detection rate reached 100％,which was significantly higher than the FLAIR and MRA(x2 =12.4,P ＜ 0.05).Conclusion Especially in the early diagnosis of hyperacute cerebral infarction,DWI is superior to FLAIR and MRA.FLAIR showed better on the cortex and periventricular lesions,MRA can check out the blood vessel lesions in the infarction area.

Objective:To detect the expression and methylation of TIA1 in breast cancer and to study its correlation with multi-slice spiral CT signs.Methods:50 patients with breast cancer were collected from Feb.2019 to Mar. 2020. The expression levels of TIA1 in breast cancer tissues and in peritumoral tissues were estimated by quantitative real-time polymerase chain reaction. Bioinformatics software MethPrimer was used for predicting TIA1 promotor and confirmed the existence of cPG island. Methylation-specific PCR (MSP) was performed to detect TIA1 DNA promoter methylation. All patients were examined by multi-slice CT. CT images were analyzed through observing the tumor size, shape, calcification area, lymph node metastasis and margin. The correlation between CT signs and TIA1 methylation status was further analyzed.Results:The expression levels of TIA1 in breast cancer tissues were lower than in peritumoral tissues (0.50±0.12, 0.95±0.10, P=0.00) , while TIA1 DNA promoter methylation rate was higher than in peritumoral tissues (64%, 42%, χ2=4.86, P<0.05) .There were no significant differences in TIA1 DNA promoter methylation rate among patients with different tumor shape and micro calcifications. TIA1 DNA promoter methylation rate in patients with mass diameter≥2 cm were significantly higher than those in patients with mass diameter<2 cm (78.57%, 45.45%, P<0.05) , and TIA1 DNA promoter methylation rate in patients with lymph node metastasis was higher than those without lymph node metastasis (79.17%, 50%, P<0.05) . TIA1 DNA promoter methylation rate in patients with burr at edge of mass was higher than those without burr at edge of mass (80.77%, 45.83%, P<0.05) . Conclusion:There is a correlation between CT imaging signs and TIA1 DNA promoter methylation rate in patients with breast cancer, which can provide more reference for the judgment of malignant degree and prognosis of patients with breast cancer.

Objective: To investigate the significance of cerebral perfusion imaging combined with CT angiography (CTA) in the diagnosis and treatment plan of patients with ischemic stroke. Methods: Total of 44 patients with acute cerebral infarction were enrolled in Taizhou First People′s Hospital from January 2018 to September 2018. Cerebral perfusion imaging and CTA examination were performed simultaneously within 12 h after the onset of the disease. The images of perfusion imaging were processed using an image workstation to measure the level of perfusion parameters in the ischemic region of the patient′s brain. The head and neck of the patient were measured by CTA. The angiography was performed, and the cerebral angiography results of all patients were as the gold standard. The clinical diagnosis and diagnostic efficacy of different examination methods in patients with ischemic stroke was observed and compared, and the differences in the parameters of perfusion imaging between different perfusion abnormal areas and normal control areas were compared. Results: When patients′ cerebral angiography and single-photon emission computed tomography (SPECT) was as the gold standard for comparison, cerebral blood flow (CBF) and mean transit time (MTT) had the highest accuracy among all parameters of perfusion imaging. The accuracy rate of perfusion imaging+CTA was 93.2%, with a specificity of 100.0% and a sensitivity of 90.1%, which was significantly higher than that of the clinical efficacy of single diagnosis. Conclusions Perfusion imaging combined with CTA can provide important supplementary reference information for clinical diagnosis and treatment of patients with ischemic stroke.

OBJECTIVE To systematically review the efficacy and safety of tranexamic acid （TXA） for hemostasis in cancer patients before and during surgery， and to provide evidence-based reference for clinical drug use. METHODS Retrieved from PubMed， Embase， the Cochrane Library， CNKI， VIP and Wanfang databases， randomized controlled trials （RCTs） about tranexamic acid （trial group） versus 0.9% Sodium chloride injection， Lactated Ringer’s solution， Compound electrolyte solution or placebo （control group） for cancer surgery were electronically searched from the inception to June 9， 2022. After literature screening and data extraction， the quality of included RCTs were evaluated by bias risk assessment tool recommended by Cochrane system evaluator manual 5.1.0. RevMan 5.3 software was used for meta-analysis or descriptive analysis， sensitivity analysis and publication bias analysis. RESULTS A total of 2 032 patients in 22 RCTs were included for meta-analysis. Results of meta-analysis showed that the blood transfusion rate [RR＝0.59， 95%CI （0.50， 0.69）， P＜0.000 01] and the volume of erythrocyte suspension infusion [MD＝－0.53， 95%CI （－0.92， －0.14）， P＝0.007] in trial group were significantly lower than control group； there was no statistical significance in the incidence of thromboembolic events [RR＝0.44， 95%CI （0.16， 1.17）， P＝0.10] or post-operative mortality [RR＝1.27， 95%CI（0.32，5.08）， P＝0.73] between two groups. Results of descriptive analysis showed that the total blood loss and postoperative drainage volume were still controversial between two groups. The results of sensitivity analysis showed that the results were basically stable. The results of publication bias analysis showed that there was little possibility of publication bias in this study. CONCLUSIONS TXA can significantly decrease the blood transfusion， reduce the volume of erythrocyte suspension infusion， whereas does not increase the incidence of thromboembolic events and post-operative mortality in cancer surgery.