Objective　: To investigate the activity concentrations of natural radionuclides in drinking water (tap water andwell water) in urban and rural areas of Hohhot, assess the safety of drinking water, and to provide data support for localdrinking water radioactivity monitoring and management. Methods　: Representative samples of well water and tap waterwere collected from nine banners/counties/districts in Hohhot. Activity concentrations were measured using a low-back-ground gross α/β counter, an α spectrometer, inductively coupled plasma mass spectrometry, and a radium/radon analyzer. Results　: A total of nine tap water samples and nine well water samples were analyzed. For the tap water samples, gross αactivity concentrations ranged from 0.093 to 0.193 Bq/L, gross β from 0.091 to 0.225 Bq/L, uranium mass concentrationsfrom 2.32 to 10.36 μg/L, thorium mass concentrations from 0.09 to 0.20 μg/L,210Po activity concentrations from below theminimum detectable limit to 0.41 mBq/L, and 226Ra activity concentrations from 8.70 to 13.35 mBq/L. For the well watersamples, gross α activity concentrations ranged from 0.111 to 0.203 Bq/L, gross β from 0.111 to 0.270 Bq/L, uranium massconcentrations from 2.31 to 13.28 μg/L, thorium mass concentrations from 0.17 to 0.26 μg/L,210Po activity concentrationsfrom 1.03 to 2.12 mBq/L, and 226Ra activity concentrations from 15.38 to 23.63 mBq/L. Conclusion　 The activityconcen-trations of natural radionuclides in both well water and tap water in the Hohhot region were at environmental backgroundlevels and met national drinking water hygiene standards.

Objective To investigate whether successful percutaneous coronary intervention(PCI)could improve symptoms and quality of life(QOL)in left main disease and/or 3-vessel disease patients with diabetes.Methods Patients with left main disease and/or 3-vessel disease who underwent PCI in the First Affiliated Hospital of Air Force Medical University from April 2018 to May 2021 were consecutively enrolled and subdivided into 2 groups:diabetes and no diabetes.Detailed baseline characteristics,symptoms,including dyspnea and angina,assessed with the Rose dyspnea scale(RDS),Seattle angina questionnaire(SAQ),the European quality of life-5 dimensions(EQ-5D)and 12-item short-form health survey(SF-12)questionnaire respectively,procedural details,and 1 month and 1 year follow-up data were collected.Results Among 440 left main disease and/or 3-vessel disease patients,disease was present in 176(40.00％),who had more hypertension,peripheral artery disease,and LCX lesion(all P＜0.05).The incidence of major adverse cardiovascular events(MACE)and all-cause mortality were similar between the two groups(both P＞0.05)at 1 month follow-up,while all-cause mortality in diabetes patients was significantly higher than those without diabetes at 1 year follow-up(P=0.013).Low left ventricular ejection fraction was an independent risk factor for MACE and all-cause mortality at 1 month and 1 year follow-up after successful revascularization(all P＜0.05).Most importantly,symptoms,including dyspnea and angina,and QOL were markedly improved regardless of diabetes both at 1 month and 1 year follow-up(all P＜0.05).Diabetes patients showed improved dyspnea and QOL at similar degree to the non-diabetes patients(all P＞0.05)and a more significantly relieved angina(P=0.013).Additionally,the number of chronic total occlusion(CTO)per patient was identified as an independent risk factor of dyspnea(OR 0.723,95％CI 0.525～0.997,P=0.048)and angina relief(OR 0.686,95％CI 0.473～0.995,P=0.047),and the contrast volume(OR 0.995,95％CI 0.992～0.999,P=0.008)as an independent risk factor of QOL improvement in diabetic patients.Conclusions Successful PCI is beneficial for relieving symptoms and improving quality of life in patients with diabetes who have left main disease and/or 3-vessel disease.

Aiming at the classification and lesion localization of giga-pixel pathology whole slide images of breast cancer,a bidirectional gated recurrent unit attention based multi-instance learning(ABMIL-BiGRU)model is proposed for interpretable prediction of H&E stained breast cancer lymph node metastasis images.The method uses two orthogonal bidirectional gated recurrent units to establish the long-short distance dependencies between the features in the row and column directions of the image block,thereby embedding the spatial position and context information of the image block,and then quantifies the attention score of each feature representation through attention multi-instance pooling,thereby achieving whole slide image-level feature aggregation and generating interpretable heat maps.The results show that ABMIL-BiGRU model has an average accuracy of 0.918 6 and an AUCof 0.9467 on the breast cancer metastasis dataset,realizing high-precision prediction of whole slide images and localization of regions of interest,and also providing human-interpretable features at the image block level.The proposed model solves the"accuracy-interpretability trade-off"problem to a certain extent,and its superior performance provides a new paradigm for the clinical application of computer-aided diagnosis and intelligent systems.

Objective:To investigate the clinical value of laparoscopic evaluation of anato-mical position of inferior mesenteric artery (IMA), inferior mesenteric vein (IMV) and left colic artery (LCA).Methods:The prospective one-arm study was conducted. The clinical data of 229 pati-ents who underwent laparoscopic left hemicolectomy for left colon or laparoscopic radical resection of rectal cancer in The Second Affiliated Hospital of Air Force Medical University from December 2022 to December 2023 were selected. The distance between the origin point of IMA and the origin point of the first branch (L1) as well as the distance from the origin point of LCA root to the junction of LCA and IMV (L2) were measured during the operation. IMA classification, the location relation-ship of LCA and IMV junction were recorded. Observation indicators: (1) situations of enrolled patients; (2) difference analysis between L1, L2 and clinical features; (3) distribution characteristics of the location relationship between LCA and IMV in different types of IMA. Mann-Whitney U test was used for comparison of measurement data with skewed distribution between groups, Kruskal-Wallis H test was used for comparison between multiple groups, and Dunn-Bonferroni test was used for pairwise comparison. Comparison of count data between groups was performed by chi-square test. Pearson or Spearman correlation analysis was conducted for correlation of continuous variables. Results:(1) Situations of enrolled patients. A total of 229 eligible patients were screened out, including 146 males and 83 females, aged 64(range, 55-71)years. The height of 229 patients was 168(range, 160-172)cm, the weight was 65.0(55.5,71.5)kg, the body surface area was (1.68±0.17)m 2, the tumor maximum diameter was 3.0(2.5,4.0)cm. The total number of lymph nodes dissected was 19(17,21), and the number of No.253 lymph node dissected was 4(3,5). The L1 was 3.50(1.20,8.00)cm, and the L2 was 2.20(0.50,7.30)cm. There were 58, 31, 32, 71, 22, 90, 26 and 212 patients with smoking, alcohol drinking, diabetes, hypertension, coronary heart disease, neoadjuvant chemo-therapy, neoadjuvant radiotherapy and preservation of the LCA, respectively. Among 229 patients, cases with BMI <18.5 kg/m 2, 18.5-23.9 kg/m 2 and >23.9 kg/m 2 were 11, 133 and 85, respectively. There were 153 cases in pathological stage Ⅰ-Ⅱ and 76 cases in stage Ⅲ. There were 168 cases of Dixon operation, 6 cases of Miles operation and 55 cases of sigmoid colon resection. There were 135 cases of IMA type 1, 44 cases of IMA type 2, 23 cases of IMA type 3, 2 cases of IMA type 4, and 25 cases of IMA type unable to judge. (2) Difference analysis between L1, L2 and clinical features.Correlation analysis showed negative correlation between the height, body surface area and L1 ( r=-0.17, -0.15, P<0.05). The L1 was 3.20(2.68,4.00)cm for male patients and 3.60(3.00,4.20)cm for female patients, respectively, showing a significant difference between the two groups ( Z=-2.37, P<0.05). The L1 of patients with IMA type 1, 2, and 3 was 3.20(2.80,4.00)cm, 3.85(3.00,4.48)cm, and 3.20(2.50,4.30)cm, respectively, showing a significant difference among them ( H=7.54, P<0.05). Further pairwise com-parison showed that there was a significant difference in L1 between patients with IMA type 2 and those with IMA type 1 ( P<0.05). The L2 of smokers and non-smokers were 2.50(1.95,3.20)cm and 2.20(1.60,2.80)cm, respectively, showing a significant difference between the two groups ( Z=-2.24, P<0.05). (3)Distribution characteristics of the location relationship between LCA and IMV in different types of IMA. There was no significant difference in LCA distribution between the anterior and posterior positions of IMV among the three IMA types (type 1, 2, 3) ( χ2=1.63, P>0.05). Conclusions:Patients with greater height have larger body surface area and shorter L1. L1 is significantly longer in female patients than in male patients. L1 is significantly longer in patients with IMA type 2 than in those with type 1. L2 is significantly longer in smokers than in non-smokers. There was no significant difference in the distribution location between LCA and IMV among patients of IMA type 1, 2 and 3.

Objective To investigate whether successful percutaneous coronary intervention(PCI)could improve symptoms and quality of life(QOL)in left main disease and/or 3-vessel disease patients with diabetes.Methods Patients with left main disease and/or 3-vessel disease who underwent PCI in the First Affiliated Hospital of Air Force Medical University from April 2018 to May 2021 were consecutively enrolled and subdivided into 2 groups:diabetes and no diabetes.Detailed baseline characteristics,symptoms,including dyspnea and angina,assessed with the Rose dyspnea scale(RDS),Seattle angina questionnaire(SAQ),the European quality of life-5 dimensions(EQ-5D)and 12-item short-form health survey(SF-12)questionnaire respectively,procedural details,and 1 month and 1 year follow-up data were collected.Results Among 440 left main disease and/or 3-vessel disease patients,disease was present in 176(40.00％),who had more hypertension,peripheral artery disease,and LCX lesion(all P＜0.05).The incidence of major adverse cardiovascular events(MACE)and all-cause mortality were similar between the two groups(both P＞0.05)at 1 month follow-up,while all-cause mortality in diabetes patients was significantly higher than those without diabetes at 1 year follow-up(P=0.013).Low left ventricular ejection fraction was an independent risk factor for MACE and all-cause mortality at 1 month and 1 year follow-up after successful revascularization(all P＜0.05).Most importantly,symptoms,including dyspnea and angina,and QOL were markedly improved regardless of diabetes both at 1 month and 1 year follow-up(all P＜0.05).Diabetes patients showed improved dyspnea and QOL at similar degree to the non-diabetes patients(all P＞0.05)and a more significantly relieved angina(P=0.013).Additionally,the number of chronic total occlusion(CTO)per patient was identified as an independent risk factor of dyspnea(OR 0.723,95％CI 0.525～0.997,P=0.048)and angina relief(OR 0.686,95％CI 0.473～0.995,P=0.047),and the contrast volume(OR 0.995,95％CI 0.992～0.999,P=0.008)as an independent risk factor of QOL improvement in diabetic patients.Conclusions Successful PCI is beneficial for relieving symptoms and improving quality of life in patients with diabetes who have left main disease and/or 3-vessel disease.

Objective:To investigate the clinical value of laparoscopic evaluation of anato-mical position of inferior mesenteric artery (IMA), inferior mesenteric vein (IMV) and left colic artery (LCA).Methods:The prospective one-arm study was conducted. The clinical data of 229 pati-ents who underwent laparoscopic left hemicolectomy for left colon or laparoscopic radical resection of rectal cancer in The Second Affiliated Hospital of Air Force Medical University from December 2022 to December 2023 were selected. The distance between the origin point of IMA and the origin point of the first branch (L1) as well as the distance from the origin point of LCA root to the junction of LCA and IMV (L2) were measured during the operation. IMA classification, the location relation-ship of LCA and IMV junction were recorded. Observation indicators: (1) situations of enrolled patients; (2) difference analysis between L1, L2 and clinical features; (3) distribution characteristics of the location relationship between LCA and IMV in different types of IMA. Mann-Whitney U test was used for comparison of measurement data with skewed distribution between groups, Kruskal-Wallis H test was used for comparison between multiple groups, and Dunn-Bonferroni test was used for pairwise comparison. Comparison of count data between groups was performed by chi-square test. Pearson or Spearman correlation analysis was conducted for correlation of continuous variables. Results:(1) Situations of enrolled patients. A total of 229 eligible patients were screened out, including 146 males and 83 females, aged 64(range, 55-71)years. The height of 229 patients was 168(range, 160-172)cm, the weight was 65.0(55.5,71.5)kg, the body surface area was (1.68±0.17)m 2, the tumor maximum diameter was 3.0(2.5,4.0)cm. The total number of lymph nodes dissected was 19(17,21), and the number of No.253 lymph node dissected was 4(3,5). The L1 was 3.50(1.20,8.00)cm, and the L2 was 2.20(0.50,7.30)cm. There were 58, 31, 32, 71, 22, 90, 26 and 212 patients with smoking, alcohol drinking, diabetes, hypertension, coronary heart disease, neoadjuvant chemo-therapy, neoadjuvant radiotherapy and preservation of the LCA, respectively. Among 229 patients, cases with BMI <18.5 kg/m 2, 18.5-23.9 kg/m 2 and >23.9 kg/m 2 were 11, 133 and 85, respectively. There were 153 cases in pathological stage Ⅰ-Ⅱ and 76 cases in stage Ⅲ. There were 168 cases of Dixon operation, 6 cases of Miles operation and 55 cases of sigmoid colon resection. There were 135 cases of IMA type 1, 44 cases of IMA type 2, 23 cases of IMA type 3, 2 cases of IMA type 4, and 25 cases of IMA type unable to judge. (2) Difference analysis between L1, L2 and clinical features.Correlation analysis showed negative correlation between the height, body surface area and L1 ( r=-0.17, -0.15, P<0.05). The L1 was 3.20(2.68,4.00)cm for male patients and 3.60(3.00,4.20)cm for female patients, respectively, showing a significant difference between the two groups ( Z=-2.37, P<0.05). The L1 of patients with IMA type 1, 2, and 3 was 3.20(2.80,4.00)cm, 3.85(3.00,4.48)cm, and 3.20(2.50,4.30)cm, respectively, showing a significant difference among them ( H=7.54, P<0.05). Further pairwise com-parison showed that there was a significant difference in L1 between patients with IMA type 2 and those with IMA type 1 ( P<0.05). The L2 of smokers and non-smokers were 2.50(1.95,3.20)cm and 2.20(1.60,2.80)cm, respectively, showing a significant difference between the two groups ( Z=-2.24, P<0.05). (3)Distribution characteristics of the location relationship between LCA and IMV in different types of IMA. There was no significant difference in LCA distribution between the anterior and posterior positions of IMV among the three IMA types (type 1, 2, 3) ( χ2=1.63, P>0.05). Conclusions:Patients with greater height have larger body surface area and shorter L1. L1 is significantly longer in female patients than in male patients. L1 is significantly longer in patients with IMA type 2 than in those with type 1. L2 is significantly longer in smokers than in non-smokers. There was no significant difference in the distribution location between LCA and IMV among patients of IMA type 1, 2 and 3.

Aiming at the classification and lesion localization of giga-pixel pathology whole slide images of breast cancer,a bidirectional gated recurrent unit attention based multi-instance learning(ABMIL-BiGRU)model is proposed for interpretable prediction of H&E stained breast cancer lymph node metastasis images.The method uses two orthogonal bidirectional gated recurrent units to establish the long-short distance dependencies between the features in the row and column directions of the image block,thereby embedding the spatial position and context information of the image block,and then quantifies the attention score of each feature representation through attention multi-instance pooling,thereby achieving whole slide image-level feature aggregation and generating interpretable heat maps.The results show that ABMIL-BiGRU model has an average accuracy of 0.918 6 and an AUCof 0.9467 on the breast cancer metastasis dataset,realizing high-precision prediction of whole slide images and localization of regions of interest,and also providing human-interpretable features at the image block level.The proposed model solves the"accuracy-interpretability trade-off"problem to a certain extent,and its superior performance provides a new paradigm for the clinical application of computer-aided diagnosis and intelligent systems.

Due to the fact that the articular cartilage of children's joints has not yet been fully ossified, visualizing the adjacent anatomical structures during the clinical diagnosis and treatment of joint diseases and injuries in children is a challenging issue. Arthrography is an efficient, convenient, and minimally invasive technique, and is particularly crucial for the visualization of children's hip joints. Currently, arthrography technology is widely employed during surgeries for developmental dysplasia of the hip (DDH), and in recent years, numerous studies have concentrated on the efficacy of joint angiography, exploring its assessment and predictive roles during and after the operation. We review the overview of hip joint arthrography techniques, such as the concept of arthrography, the selection of access routes for hip joint arthrography, the process of hip joint arthrography, the dosage and operation of contrast agents, and the adverse reactions of contrast agents; the use of hip joint arthrography to evaluate the quality of closed reduction; the use of hip joint arthrography to predict the future development and outcome of the acetabulum after closed reduction; the use of hip joint arthrography in the study of open reduction or osteotomy; the use of hip joint arthrography to observe the morphology of soft tissues in the hip joint; the use of hip joint arthrography in combination with nuclear magnetic resonance to observe the anatomical structure of the acetabular labrum. Summarizing the research results of arthrography for evaluating the corresponding indicators of the hip joint helps improve the matching between the femoral head and the acetabulum and the accuracy of evaluating the quality of reduction, uncovers identifying factors such as labrum varus that hinder concentric reduction, enhances the ability to predict the development and outcome of the acetabulum, and has significant guiding significance for the precise selection of the timing of surgical intervention for early and residual deformities in children with DDH. Exploring the application of arthrography technology in evaluating the quality of closed reduction in DDH and predicting the development of the acetabulum after reduction is expected to provide meaningful references for orthopedic surgeons in the current clinical diagnosis, treatment, and research of DDH.

AIM To establish the HPLC-CAD characteristic chromatograms of Qingzhi Huayu Formula,and to determine the contents of rhamnose,fructose,mannitol,D-anhydrous glucose,sucrose and raffinose.METHODS The analysis was performed on a 35 ℃ thermostatic Dikma Polyamino HILIC column (4.6 mm×250 mm,5 μm),with the mobile phase comprising of acetonitrile-water flowing at 0.8 mL/min in a gradient elution manner.RESULTS There were 14 common peaks in the characteristic chromatograms of 15 batches of samples with the similarities of more than 0.90.Six carbohydrates showed good linear relationships within their own ranges ( r>0.9950 ),whose average recoveries were 93.34％-105.64％ with the RSDs of 0.5％-2.6％.CONCLUSION This accurate,reliable,sensitive and reproducible method can be used for the quality control of carbohydrates in Qingzhi Huayu Formula.

Objective To investigate the clinical efficacy of the placement of the main mechanical support points in the early and middle stages of mechanical repair of femoral head necrosis in preventing collapse of the femoral head.Methods A retrospective analysis was performed for 17 cases 22 hips of non-traumatic femoral head necrosis in the early and middle stages from June 2018 to June 2019,including 14 males 18 hips and 3 females 4 hips,aged 34 to 47 years old.Among them,6 cases were hormonal,8 were alcoholic and 3 were idiopathic.According to China-Japan Friendship Hospital(CJFH)classification,9 hip were type L1,8 were L2,5 were L3.All cases were given dead bone scraping,autologous iliac granules pressed bone graft-ing,and allogeneic fibula column support treatment.After surgery,Sanqi Jiegu Pill(三 七 接 骨 丸)was administered orally for 3 months.X-rays of both hips were performed after surgery and follow-up,and the clinical efficacy was evaluated by hip Harris score before and after surgery.Results All cases were followed up for 24 to 38 months.The Harris score of 22 hips increased from 58 to 77 preoperative to 68 to 94 at the final follow-up.At the final follow-up,3 hips were excellent,1 1 hips were good,3 hips were acceptable,5 hips were poor.Two hips of L2 type progressed to ARCO Ⅲ B stage and continued to be observed,2 hips of L2 type and 2 hips of L3 type progressed to ARCO Ⅳ stage,and received total hip replacement,and 1 hip infection at 3 months after surgery was given a cement spacer.Conclusion Based on CJFH classification,collapse can be predicted to a cer-tain extent according to the area,volume,location and human biological characteristics of osteonecrosis,and the main mechan-ical support points are found on this basis to prevent collapse.