To address the large treatment area and tight construction period of large-scale engineering site filling foundations and to ensure the quality and progress of the project, understanding the foundation-reinforcement treatment quickly and accurately is essential. Additionally, to ensure the safety and stability of projects, large-scale projects often have higher requirements for the uniformity of the foundation-soil reinforcement effect. The quality-evaluation indices of foundation-soil compaction and reinforcement mainly include the foundation-bearing capacity, foundation-soil deformation modulus, and compaction coefficient. Conventional testing methods primarily include in-situ loading tests, in-situ sand filling, and soil-sample testing. These methods are either labor-intensive and time-consuming or harmful to the reinforced foundation-soil mass, preventing rapid and continuous detection of the foundation-soil mass. To perform rapid and continuous detection of the compaction and reinforcement effects of foundation-soil mass, the multichannel transient Rayleigh wave-detection method, considering the time difference phase between channels, was used in this study. Additionally, the method was supplemented by the sampling tests of soil mass at selected points in this study. Consequently, continuous three-dimensional imaging of the elastic wave velocity of the foundation-soil mass was obtained, along with the horizontal slice of the Rayleigh wave phase velocity imaging and the horizontal-distribution imaging of the depth-average compaction coefficient of the foundation-soil mass. The results reveal that the foundation-soil mass imaging can accurately reflect the compaction and reinforcement effects of the foundation-soil mass, thereby providing a reliable basis for evaluating the quality of foundation-soil mass reinforcement.

To accurately explore distribution of a historical small coal mine goaf in Hami, Xinjiang, integrated application of microtremor and transient electromagnetic is used for goaf exploration researching. This work use different physical properties data into lithology, use microtremor exploration to determine the goaf position and use transient electromagnetic exploration identify goaf water. Two methods can complement each other, verify each other, and effectively reduce the wrong results of single geophysical method. Which also provides a reference for the selection and application of geophysical exploration means in small mine goaf exploration.

The deep target strata K1q, J3k and J2t in the Hutubi area have large-scale reservoirs and abundant oil and gas resources, but the traditional rock physics modeling of porous media cannot effectively distinguish oil and gas desserts from mudstones. Based on the systematic analysis of the logging curve characteristics of the target section, the shear wave velocity is corrected by the differential equivalent medium rock physics model, and the VPVSC and PIMP curves are restored by the Gassman equation fluid replacement, which highlights the sweet spot reservoir and mudstone discrimination. The linear sliding theory is introduced to establish the rock physics model of fractured reservoirs in dual-porosity media. The differential equivalent medium rock physics model for primary pores and the linear sliding model for anisotropic secondary fractures are organically integrated to realize the anisotropic medium rock physics modeling of the pore-fracture reservoir in the Hu 1-Hu 6 well area, and the rock physics plate is constructed. Combined with the anisotropic inversion of pre-stack OVT domain seismic data, the dominant reservoirs are effectively predicted. This paper has formed a complete set of deep fracture prediction method and technical processes, that provide a reference for the exploration and development of deep targets in similar exploration areas.

Objective: To investigate the utility of texture data based on T2-weighted magnetic resonance imaging (MRI) in determining intervertebral disc degeneration in adolescent idiopathic scoliosis (AIS). Materials and Methods: From October 2016 and March 2020, 122 patients with AIS and 40 volunteers who underwent 3.0T MRI were prospectively included. The following MRI texture data were generated: (1) mean, (2) standard deviation, (3) max, (4) min, (5) the fifth, 10th, 25th, 50th, 75th and 90th percentiles; (6) skewness; (7) kurtosis; and (8) entropy. The Pfirrmann system was used to evaluate the intervertebral discs of all participants. Patients with Pm I were divided into groups 1 and 2. Volunteers were classified into 0. Differences and correlations between the groups were analyzed. Results: The mean, standard deviation, max, entropy and the 5th, 10th, 25th, 50th, 75th, and 90th percentiles in group 2 were significantly lower than those in group 1 and group 0; the min in group 2 was significantly lower than in group 0; the skewness in group 2 was significantly higher than in group 1 and group 0; the kurtosis in group 2 was significantly lower than in group 1; the skewness in group 1 was significantly higher than in group 0 and the standard deviation, min, kurtosis and 5th, 10th, 25th, and 50th percentiles in group 1 were significantly lower than those in group 0. Conclusion: Texture analysis can be used to assess early degenerative changes in the intervertebral discs of patients with AIS.

Objective: To investigate the potential of CT-enhanced quantitative parameters for preoperative prediction of WHO/ISUP grading for renal clear cell carcinoma (ccRCC). Methods: The study involved collecting clinical and CT-enhanced data of 98 patients with ccRCC, who were then classified into low level group (76 cases) and high level group (22 cases) based on the WHO/ISUP classification. Differences in CT-enhanced quantitative parameters between the two groups were compared, and the diagnostic efficacy of each parameter for predicting ccRCC WHO/ISUP grading was evaluated. External verification was conducted to identify CT-enhanced quantitative parameters with the best generalization ability. Results: There were significant differences in the CT value, net increment, and enhancement rate in both cortical and substantive phases between the two groups. The AUC values were 0.834, 0.871, 0.900, 0.707, 0.678, and 0.762, respectively. The cut-off values were 123.5 HU, 71 HU, 0.73, 87.5 HU, 54 HU, 0.67, respectively. The diagnostic efficacy of cortical enhancement rate was the highest with an AUC of 0.900, a sensitivity of 0.842, and a specificity of 0.864. The external validation results revealed that the diagnostic efficacy of cortical phase enhancement rate (AUC=0.867) was better than that of cortical phase CT (AUC=0.735) and cortical phase net increment (AUC=0.709). The Z values were 2.134 and 2.417, respectively. Conclusion: The quantitative parameters of CT enhancement can be used to predict ccRCC WHO/ISUP grading. Cortical phase enhancement rate is the parameter with the highest diagnostic efficiency and the best generalization ability.

Purpose: To investigate the predictive value of energy spectrum CT quantitative parameters combined with serum tumor markers (CEA, CA-125) on Ki-67 expression in lung adenocarcinoma. Methods: The clinicopathological and imaging data of 64 patients with lung adenocarcinoma confirmed by pathology from June 2020 to February 2022 were retrospectively analyzed. All patients underwent dual-phase energy spectrum CT examination, and serum CEA and CA-125 levels before treatment were clear. Based on postoperative pathological results, patients were divided into two groups, the high expression group of Ki-67 (>30%) and the low expression group of Ki-67 (≤30%). The iodine value (IC), standardized iodine ratio (NIC), and the slope of the energy spectrum curve (λHU) were measured by a dual-energy post-processing workstation. The expression levels of SERUM CEA and CA-125 before treatment were obtained according to medical records. Statistical analysis of the data was performed with SPSS 22.0; t-test or Mann−Whitney U test and $\chi^2$ tests were used to compare the differences in parameters between the two groups, and the ROC (receiver operating characteristic curve, ROC) curve was used to evaluate the prediction efficiency of the parameters. Results: The IC, NIC, and λHU values in the low expression group were higher than those of the high expression group, and the differences were statistically significant. Serum CEA and CA-125 levels in the Ki-67 high expression group were higher than those of the low expression group, and the difference was statistically significant. There were no significant differences in other parameters between the two groups. ROC curve analysis showed that CEA had the best predictive efficiency for Ki-67, with an area under the curve of 0.697, sensitivity of 39.17%, and specificity of 100%. Conclusions: The quantitative parameters of energy spectrum CT in the venous phase, serum CEA, and CA12-5 levels have a certain value in predicting the expression of Ki-67, which can provide a basis for selecting a clinical treatment plan.

Objective: To investigate the diagnostic value of dual-source CT (DSCT) in evaluating adults with atrial septal defect (ASD) with pulmonary hypertension (PAH). Methods: Seventy-five adult patients with ASD in our hospital were retrospectively analyzed. The study sample was divided into 2 groups (PAH group (n=40) and non-PAH group (n=35 cases)) according to the mean pulmonary artery pressure (mPAP) obtained by right cardiac catheterization (RHC) (PAH: ≥ 25 mmHg). All patients were examined for congenital heart disease by DSCT one week before RHC. The ascending aorta diameter (AAD), main pulmonary artery diameter (MPAD), right pulmonary artery diameter (RPAD), left pulmonary artery diameter (LPAD), right lower pulmonary artery diameter (RLPAD), the maximum diameter of the short axis of both the ventricles (RVD, LVD), included the angle of the spinal ventricular septum and ASD diameter, were measured on the image. The MPAD to AAD ratio (rPA) and the RVD to LVD ratio (RVD/LVD) were calculated. Differences between the two groups in terms of clinical data, RHC indexes, and CT cardiovascular parameters were evaluated by a t-test. The ROC curve was used to determine the diagnostic efficacy of DSCT in adults with ASD and PAH. Pearson correlation coefficient was used to analyze the association between the CT parameters, mPAP, and PVR. Results: The statistically significant CT indexes between the two groups were MPAD, RPAD, LPAD, RLPAD, RVD including the angle of the spinal ventricular septum, rPA, RVD/LVD, and ASD diameter. Of these, the RPAD and LPAD including the angle of the spinal ventricular septum, rPA, RVD/LVD, and ASD diameter demonstrated moderate diagnostic efficacy for PAH (AUC>0.7). The MPAD, rPA, and ASD diameter with mPAP were moderately positively correlated. The MPAD, rPA, and RVD/LVD with PVR were also mildly positively correlated. Furthermore, the ASD diameter and PVR were highly positively correlated. Conclusion: DSCT is diagnostically valuable for the evaluation of adults with ASD complicated with PAH. In particular, DSCT may be used to provide a comprehensive evaluation before clinical treatment, as well as for long-term follow-up and management.

Objective: To evaluate the imaging features of the Segond fracture and explore its clinical value in lateral instability of the knee joint. Methods: We retrospectively analyzed 45 cases of the Segond fracture. This involved the analysis of the characteristics of the fracture, including the relationship between the fracture and the ligaments around the knee joint, meniscus injury, and the size and location of the fracture block. Moreover, the significance of the Segond fracture in clinical treatment was discussed. Results: Among 45 cases of the Segond fracture, 41 (91.11%) had anterior cruciate ligament (ACL) injury, 31 (68.89%) had anterolateral ligament (ALL) injury, and 12 (26.67%) had iliotibial bundle (ITB) injury. The ALL were all attached to the fracture block, and 25 cases (55.55%) were attached to the ITB. The larger the size of the fracture block and the smaller the distance from the center of Gerdy's nodule, the more likely that the fracture block was attached to the ITB. Conclusion: The Segond fracture is often associated with ACL injury, involving the ALL and ITB. The larger the fracture block and the closer to the center of Gerdy's nodule, the greater the possibility of ITB involvement. Therefore, patients with Segond fractures should be alert to lateral instability of the knee joint.

Objective: To explore the feasibility of using a new artificial intelligence (AI)-based iterative reconstruction algorithm with low tube voltage to reduce the radiation dose of coronary computed tomography angiography (CTA) in obese patients. Methods: A total of 40 patients were randomly divided into routine-dose (group A n=20) and low-dose groups (group B n=20). In group A, a tube voltage of 120 kV and a tube current of 200 mAs, whereas in group B, a tube voltage of 80 kV and a tube current of 200 mAs were used. The collected data was transferred to the post-processing workstation. The image reconstructions of the conventional and new iterative reconstruction algorithms based on AI were used. Comparative analysis of average CT value of the aorta, signal to noise ratio (SNR) and contrast to noise ratio (CNR) of the aorta and left coronary, SNR and CNR of right coronary in the two groups. Results: The average CT value of the aorta in group B, the SNR and CNR of the aorta and the left coronary artery, the SNR and CNR of the right coronary artery was not significantly different from those of group A. There was no difference in the subjective image quality between the two groups. However, the radiation dose in patients of group B was reduced by 68.2% compared with that of group A. Conclusion: The new iterative reconstruction algorithm can significantly improve the image quality of the reconstruction. The radiation dose can be significantly reduced with a tube voltage of 80 kVp, and the coronary CTA image equivalent to the image quality of the conventional dose can be obtained.

Objective: To investigate the correlation between changes in tumor burden and the dose of intraoperative radiation therapy (IORT) for unresectable pancreatic cancer within 60 days of treatment evaluated using imaging parameters. Methods: A total of 32 cases of unrespectable pancreatic cancer treated with IORT at the Sichuan Cancer Hospital from April 2017 to July 2020 were retrospectively included. The imaging parameters of the tumor were recorded 7 days before IORT and 60 days after IORT: the longest axis (LA), shortest axis (SA), largest cross-sectional area (A), absolute value changes of each parameter (Δ), and change rate (Δ%). Different tumor load groups (shrinking/stabilizing/increasing) were differentiated, and the relationship between each parameter, IORT radiation dose, and tumor response time was analyzed. Results: The LA of unresectable pancreatic cancer after IORT was lower than that before IORT, with significant differences observed. The SA and A values of unresectable pancreatic cancer after IORT were lower than those before IORT, with no statistical significance observed. Based on ΔLA of the pancreatic tumor, the three groups, shrinkage, stability, and enlargement, were divided, with a corresponding tumor response time of (39.57±11.77) d, (38.08±12.87) d, (41.17±42) d, respectively. There were no significant differences in LA, SA, and A among the three groups before IORT, while significant differences were observed in LA, SA, and A after IORT. The ΔLA of the three groups was statistically significant before and after IORT. There was a moderate negative correlation between ΔLA and IORT dose levels in unrespectable pancreatic cancer (r=−0.47,). There was a moderate and high correlation between ΔLA and IORT dose in the stable group and ΔA and IORT dose in the enlargement group, respectively (r=0.66 vs. 0.90). There was no significant correlation between the response time and imaging parameters in these groups, except for a moderate negative correlation between ΔSA and response time in the stability group (r=−0.68). Conclusion: ΔLA can be used to evaluate changes in tumor load within 60 days of IORT for unresectable pancreatic cancer. The efficacy of pancreatic cancer could be correlated with the IORT irradiation dose, whereas the tumor burden could not be affected by the tumor response time.

Objective: To explore the mulyi-slice computed tomograpy (MSCT) imaging characteristics of pulmonary mucosa-associated lymphoma tissue. Methods: The clinical data and MSCT findings of eight cases of pulmonary MALT lymphoma confirmed by pathology in our hospital from February 2014 to July 2022 were analyzed retrospectively. The causes of misdiagnosis were also analyzed. Results: Five patients underwent plain and enhanced chest CT scans, and three underwent plain chest CT scans alone. Among the eight patients, four had a single focus, four had multiple foci, and seven showed large patches of high-density shadows. All patients showed air bronchogram, and one showed mixed density patches. CT enhancement showed moderate enhancement in four cases, slight enhancement in one case, and angiography sign in four cases. Conclusion: Primary MALT lymphoma of the lung is an inert tumor with low-grade malignancy. The MSCT findings have certain characteristics. Therefore, it is necessary to obtain diseased tissues in time for pathological examination and immunohistochemistry to make a clear diagnosis.

Wandering spleen (WS), known as the ectopic spleen, was first identified in autopsies by Dutch physician Johannes von home in 1677. It is an acute or chronic disease caused by increased activity of the spleen. When a splenic torsion occurs in the WS, it is called splenic torsion (ST). The incidence of ST is small, accounting for only 20% of WS, but it is extremely dangerous, and severe cases can cause splenic infarction or even life-threatening. The disease is rare, with only 500 cases reported worldwide. There have been no cases of ST with pancreatic tail torsion reported in China. To improve the awareness of the disease, one patient admitted to our hospital was reported.

Acute gastrointestinal bleeding (AGIB) is a common and serious condition that requires prompt diagnosis and effective treatment. Multi-phase contrast-enhanced computed tomography (CT) can rapidly identify the location and cause of active gastrointestinal bleeding, providing crucial information for subsequent treatment decisions, and has become a potential first-line tool for evaluating AGIB. In this report, we describe four cases of AGIB with clinical presentations of hematemesis and melena, accompanied by symptoms such as post-exertional palpitations, weakness, hypotension, confusion, and coma. Some patients also had abdominal distension, pain, dizziness, and chest tightness. The laboratory results showed anemia and positive fecal occult blood tests. Multi-phase contrast-enhanced CT allowed for the accurate localization of the active bleeding sites in the digestive tract. Among the four patients, two showed significant symptom improvement after treatment, one was transferred to a higher-level hospital due to critical illness and died from multiple organ failure, and one patient died from hemorrhagic shock due to lymphoma and multiple organ failure. This article discusses the value of multi-phase contrast-enhanced CT for the clinical diagnosis of AGIB and provides a literature review to summarize the imaging characteristics of AGIB on multi-phase contrast-enhanced CT to provide reliable evidence for the timely diagnosis of AGIB.

Surface wave exploration plays a vital role in obtaining target detection information by analyzing and retrieving the dispersion curve of surface waves. Although surface wave exploration technology originated in the 1960s, it has experienced significant advancements in recent decades and has found widespread applications in earthquake disaster and volcanic activity prediction, deep geological structure analysis, engineering construction, mining area and goaf assessment, subsidence area detection, and near-surface structure investigation, including celestial bodies such as stars. This paper aims to provide a comprehensive overview of surface wave exploration technology. It begins by discussing two types of data sources, namely active source and passive source, and proceeds to review the fundamental theory of surface wave exploration based on dispersion curve analysis and observations of horizontal and vertical amplitude ratios. This paper also provides a brief introduction to the surface wave inversion method. Additionally, it highlights the various application domains of surface wave exploration, outlines the current development trend, and presents future prospects for this technology.

Diabetic cardiomyopathy (DCM) presents as myocardial fibrosis, left ventricular hypertrophy, and myocardial diastolic abnormalities. Cardiac magnetic resonance (CMR) technology can quickly and accurately determine the myocardial structure and cardiac function of diabetic patients and plays a crucial role in the diagnostic and prognostic evaluation of subclinical DCM. Evaluation of subclinical DCM using CMR technology primarily involves cardiac magnetic resonance-feature tracking (CMR-FT), magnetic resonance spectroscopy (MRS), T1 mapping technology, and magnetic resonance myocardial perfusion imaging. This paper reviews the research progress of CMR technology in the diagnosis of subclinical diabetic cardiomyopathy.

The frequent occurrence of terrorist incidents has seriously affected the security and order of the international community, bringing unprecedented challenges to the safety of passenger and freight transportation. Effectively combating terrorist activities and ensuring personal and property safety are important demands in the field of public security both domestically and globally. Therefore, how to enhance security inspection capabilities through high-tech means has become an important issue and research hotspot of concern. X-ray diffraction (XRD) technology can identify prohibited substances at the molecular level, with high discrimination, and has broad application prospects in the field of safety inspection. Starting from the basic theory of diffraction, this article briefly describes the current research progress in the structure and recognition algorithms of XRD systems, as well as the advantages of XRD technology. An XRD system was built to verify its effectiveness. Finally, the development direction of XRD was prospected, with the aim of further promoting this technology to play a more important role in the field of public safety.