1.Analysis of the application effect, access safety and infection-related factors of extracorporeal membrane oxygenation in series with continuous renal replacement therapy access in critically ill patients.
Xiangyu ZHU ; Yan SHI ; Peng XIE ; Jing FU ; Wenhan GE ; Haichen YANG
Chinese Critical Care Medicine 2025;37(10):962-967
OBJECTIVE:
To analyze the efficacy and access safety of extracorporeal membrane oxygenation (ECMO) in series with continuous renal replacement therapy (CRRT) access for critically ill patients using propensity score matching analysis, and to explore the potential influencing factors of infection.
METHODS:
A total of 200 critically ill patients who received both ECMO and CRRT treatment in the intensive care unit (ICU) of Huai'an Second People's Hospital from December 2020 to December 2024 were retrospectively selected as the research subjects. They were divided into the independent operation group (72 cases) and the series system group (128 cases) according to the access connection mode of ECMO and CRRT. Propensity score matching analysis was used to perform 1 : 1 matching for patients of the two groups. The general data [age, gender, body mass index (BMI), clinical diagnosis, underlying disease, intubation method, intubation position, disease severity, ECMO support duration, catheter indwelling duration, oxygenation index (PaO2/FiO2) at 48 hours after ECMO initiation, serum creatinine (SCr), procalcitonin (PCT), hemoglobin (Hb), white blood cell count (WBC), platelet count (PLT)], treatment status [ECMO initiation duration, ECMO operation duration, ECMO flow, left ventricular ejection fraction (LVEF), CRRT initiation duration, CRRT catheter indwelling duration, inflow and outflow volume of replacement fluid], clinical outcome indicators (28-day survival rate, length of ICU stay, renal function recovery, fluid balance compliance rate), and access safety indicators (incidence of ECMO access thrombosis, incidence of infection, and incidence of bleeding events) of all the patients were collected. Subgroup analysis was conducted based on the occurrence of infection, and multivariate Logistic regression analysis was used to screen the potential risk factors for infection in critically ill patients receiving both ECMO and CRRT treatment.
RESULTS:
Finally, a total of 120 patients were successfully matched, with 60 patients in both the independent operation group and the series system group. No statistically significant differences were observed in the general data between the two groups, indicating comparability. Compared with the independent operation group, the ECMO flow at 48 hours after ECMO initiation, SCr, and alanine transaminase (ALT) of the patients in the series system group were significantly decreased, while the LVEF at 48 hours after ECMO initiation was significantly increased, additionally, the CRRT initiation duration, CRRT catheter indwelling duration, and the length of ICU stay were significantly shortened, and the inflow and outflow volume of replacement fluid were significantly increased. The incidence of infection and bleeding events in the series system group was significantly lower than that in the independent operation group [infection incidence: 11.67% (7/60) vs. 36.67% (22/60), bleeding event incidence: 8.33% (5/60) vs. 48.33% (29/60), both P < 0.05]. No significant difference was found in the other general data, treatment status, clinical outcome indicators, or access safety indicators between the two groups. Among the 120 patients, 29 cases developed infection (accounting for 24.17%), and 91 cases had no infection (accounting for 75.83%). Compared with the non-infection group, the catheter indwelling duration was significantly prolonged and PCT was significantly increased in the infection group, while the PLT and the proportion of patients with ECMO and CRRT access connected via the series system were significantly decreased. Multivariate Logistic regression analysis showed that catheter indwelling duration [odds ratio (OR) = 1.277, 95% confidence interval (95%CI) was 1.001-1.629, P = 0.049], PCT (OR = 1.529, 95%CI was 1.222-1.914, P < 0.001], PLT (OR = 0.953, 95%CI was 0.926-0.981, P = 0.001), and access connection mode (OR = 0.289, 95%CI was 0.090-0.930, P = 0.037) were potential risk factors for infection in critically ill patients.
CONCLUSIONS
The ECMO-in-series CRRT access can accelerate the initiation of CRRT, avoid local bleeding, stabilize patients' cardiac, hepatic and renal functions, reduce potential infection risks, and improve the prognosis of patients.
Humans
;
Extracorporeal Membrane Oxygenation/adverse effects*
;
Critical Illness/therapy*
;
Retrospective Studies
;
Continuous Renal Replacement Therapy
;
Male
;
Female
;
Intensive Care Units
;
Propensity Score
;
Middle Aged
;
Renal Replacement Therapy
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Adult
;
Aged
;
Risk Factors
2.Comprehensive Analysis of Oncogenic, Prognostic, and Immunological Roles of FANCD2 in Hepatocellular Carcinoma: A Potential Predictor for Survival and Immunotherapy.
Meng Jiao XU ; Wen DENG ; Ting Ting JIANG ; Shi Yu WANG ; Ru Yu LIU ; Min CHANG ; Shu Ling WU ; Ge SHEN ; Xiao Xue CHEN ; Yuan Jiao GAO ; Hongxiao HAO ; Lei Ping HU ; Lu ZHANG ; Yao LU ; Wei YI ; Yao XIE ; Ming Hui LI
Biomedical and Environmental Sciences 2025;38(3):313-327
OBJECTIVE:
Hepatocellular carcinoma (HCC) is sensitive to ferroptosis, a new form of programmed cell death that occurs in most tumor types. However, the mechanism through which ferroptosis modulates HCC remains unclear. This study aimed to investigate the oncogenic role and prognostic value of FANCD2 and provide novel insights into the prognostic assessment and prediction of immunotherapy.
METHODS:
Using clinicopathological parameters and bioinformatic techniques, we comprehensively examined the expression of FANCD2 macroscopically and microcosmically. We conducted univariate and multivariate Cox regression analyses to identify the prognostic value of FANCD2 in HCC and elucidated the detailed molecular mechanisms underlying the involvement of FANCD2 in oncogenesis by promoting iron-related death.
RESULTS:
FANCD2 was significantly upregulated in digestive system cancers with abundant immune infiltration. As an independent risk factor for HCC, a high FANCD2 expression level was associated with poor clinical outcomes and response to immune checkpoint blockade. Gene set enrichment analysis revealed that FANCD2 was mainly involved in the cell cycle and CYP450 metabolism.
CONCLUSION
To the best of our knowledge, this is the first study to comprehensively elucidate the oncogenic role of FANCD2. FANCD2 has a tumor-promoting aspect in the digestive system and acts as an independent risk factor in HCC; hence, it has recognized value for predicting tumor aggressiveness and prognosis and may be a potential biomarker for poor responsiveness to immunotherapy.
Humans
;
Carcinoma, Hepatocellular/diagnosis*
;
Liver Neoplasms/diagnosis*
;
Immunotherapy
;
Fanconi Anemia Complementation Group D2 Protein/metabolism*
;
Prognosis
;
Male
;
Female
;
Middle Aged
;
Biomarkers, Tumor/metabolism*
3.Study on the current status of emergency management for severe mental disorders in Shanghai
Xiaolei GE ; Yi ZHU ; Chunmei CHEN ; Youwei ZHU ; Yanli LIU ; Jun CAI ; Weibo ZHANG ; Fei XIE
Shanghai Journal of Preventive Medicine 2025;37(3):276-281
ObjectiveTo investigate the current status of emergency management for severe mental disorders in Shanghai, and to provide countermeasures and suggestions for the establishment of a sound emergency management system for severe mental disorders and the enhancement of emergency management capability. MethodsA questionnaire survey and qualitative interviews were used to conduct an investigation into the emergency management in 17 district-level mental illness prevention and control institutions in Shanghai, which includes the basic situation of emergency management for severe mental disorders, the construction of emergency response teams and personnel, emergency preparedness drills and training, emergency management plans and rules and regulations, and problems encountered in emergency management. ResultsIn terms of emergency management mechanism and basic situation, resources such as personnel allocation, security funds and green channel were well equipped in each district-level mental illness prevention and control institution in Shanghai. However, the equipment of some hardware facilities was still insufficient to some extent. Therefore, further improvement on the emergency management mechanism for severe mental disorders was needed. With regard to the construction of emergency team and personnel allocation, the majority were those aged between 35‒<45 years old, with a bachelor’s degree, and more than 10 years of working experience. For example, 90.27% staff in district-level mental illness prevention and control institution had a bachelor’s degree or above, which was higher than that among the staff in community-level (73.60%); staff majored in clinical medicine in district-level institution accounted for the proportion at 52.71%, higher than that among the staff in community-level (28.86%); 57.24% staff in district-level institution had an intermediate professional title, higher than that among the staff in community-level (42.28%); and 69.90% staff in district-level institution had more than 10 years of working experience, higher than that among the staff in community-level (43.62%). In the aspect of emergency drills and training, all district-level mental illness prevention and control institutions in Shanghai had a high demand for emergency training, and the weak aspects mainly focused on lack of emergency service protocols, skills of addressing technical challenges, and construction of effectiveness evaluation system. Moreover, the teaching methods were primarily centered on case analysis, simulation drills, interactive discussions, and so forth. Concerning emergency management plans and rules and regulations, all districts in Shanghai had relatively established well-developed systems for emergency response plans, emergency response leadership groups, and emergency response operational task forces for severe mental disorders. About half of the institutions had established other rules and regulations related to emergency management of severe mental disorders in addition to emergency plans. ConclusionShanghai has initially established an emergency management system for severe mental disorders, but it is still fragile in specialized training for emergency management of severe mental disorders, construction of emergency management mechanisms, and the building-up of grassroots emergency teams. Further priorities should include strengthening emergency management training, enhancing the construction of emergency management personnel teams, and gradually establishing a more comprehensive and integrated emergency management mechanism for severe mental disorders.
4.Advances in basic research on transient receptor potential vanilloid 1 channel in the pathogenesis and treatment of major depressive disorder
Junjie HUANG ; Yinping XIE ; Hailong GE ; Chen LI ; Lujia SI ; Lan WU ; Ling XIAO ; Gaohua WANG
Chinese Journal of Psychiatry 2025;58(1):69-74
Major depressive disorder (MDD) is a common mental disorder characterized by long-term low mood, anhedonia, and may even lead to suicidal behavior. The development and progression of MDD involves a range of pathological alterations in the central nervous system, including dysfunction of synaptic transmission, hyper-activation of neuroinflammation, and diminished neurogenesis. The transient receptor potential vanilloid 1 (TRPV1) channel is highly expressed in brain regions associated with depression, and can regulate physiological activities such as neuroinflammation, neurogenesis, and synaptic transmission efficacy. Hence, the TRPV1 channel should be implicated in the pathogenesis of depression and be considered as a promising candidate for antidepressant treatment. This paper provides an overview of the structure and function of TRPV1 channel, with a focus on elucidating the potential mechanism of action of TRPV1 channel in depression, and explores its research trajectory and development prospects in the context of depression therapy.
5.Establishment of TCM Comprehensive Control and Prevention Program of Elderly Hypertension with Early Renal Damage Based on Delphi Method
Rui FANG ; Yong YANG ; Le XIE ; Yan YANG ; Yue ZHOU ; Wenfeng XU ; Jinwen GE
World Science and Technology-Modernization of Traditional Chinese Medicine 2025;27(7):1867-1877
Objective To establish a scientific and feasible Chinese medicine(CM)comprehensive control and prevention program for elderly hypertension with early renal damage(EH-ERD)patients through high-level evidence-based medicine(EBM)evidence.Methods On the basis of literature research and evidence evaluation,we construct a database of specific prescriptions and implementation methods of CM comprehensive control and prevention program with EH-ERD.40 senior titled-experts were consulted in two rounds of questionnaires based on Delphi methods.We selected,evaluated,and revised specific CM comprehensive control and prevention program of EH-ERD through the analysis of multiple factors,such as expert's positive activity coefficient,authority coefficient,degree of opinion concentration and degree of coordination.Results In view of the CM appropriate intervention techniques with high-grade evidence(level Ⅰ and Ⅱ)and recommendation(level A and B),we have developed the CM comprehensive control and prevention plan items for EH-ERD.The activity coefficients in two-round consultation were 92.5%and 97.14%respectively,the overall authority coefficient(Cr)was exceeded 0.70,and the coordination coefficient was less than 0.25.With a sound activity coefficient,a relatively high Cr and a rather unified degree of opinion concentration and coordination,the CM comprehensive control and prevention program for EH-ERD was established,which included six primary indicators(CM compound preparation,acupuncture and massage,CM health education,medicinal diet therapy,health care exercise and foot bath)and seventeen secondary indicators.Conclusion The CM comprehensive control and prevention program for EH-ERD established in this study can provide a basis for the further formation of expert consensus or guidelines.Moreover,it can supply the strategy and paradigm for standardization of CM-based health management of EH-ERD.
6.Safety and efficacy of PED Shield in intracranial unruptured saccular aneurysms
Runze GE ; Xin FENG ; Xueyan DENG ; Zehui XIE ; Can LI ; Shuyin LIANG ; Shixing SU ; Xin ZHANG ; Xifeng LI ; Chuanzhi DUAN
Chinese Journal of Neuromedicine 2025;24(7):649-655
Objective:To investigate the safety and efficacy of Pipeline embolization device (PED) Shield in intracranial unruptured saccular aneurysms.Methods:This is a retrospective cohort study; 124 patients with intracranial unruptured saccular aneurysms treated with PED Shield at Department of Cerebrovascular Surgery, Neurosurgery Center, Zhujiang Hospital, Southern Medical University from July 2023 to October 2024 were enrolled. Intraoperative device-related complications and occurrence of hemorrhagic and ischemic complications within 30 days of the procedure were recorded. The clinical results and imaging results (degrees of stent patency and aneurysm occlusion rate) 6 months after follow-up were statistically analyzed. Modified Rankin scale (mRS) score>2 was defined as poor prognosis in clinical follow-up, and grade D according to O'Kelly Marotta (OKM) classification was considered as complete aneurysm occlusion in imaging follow-up.Results:Eighty-seven females and 37 males, aged (56.44±12.17) years (ranging from 27 to 80 years) were enrolled, with a maximum aneurysm diameter of 5.12 (3.73, 7.24) mm. Among the 124 patients, incidence of intraoperative instrument-related complications was 6.5% (8/124); and within 30 days of the procedure, incidence of ischemic complications was 4.8% (6/124) and that of hemorrhagic complications was 1.6% (2/124). Eighty-four patients had a 6-month clinical follow-up, with 1 patient (1.2%) having poor prognosis. Eighty-four patients (67.7%) completed a 6-month imaging follow-up: complete occlusion rate of aneurysms was 82.1% (69/84), incidence of in-stent stenosis (stenosis degree ≥25%) was 4.8% (4/84), and no symptomatic in-stent stenosis was found.Conclusion:Result of this study shows that PED Shield may be an effective and safe clinical option for intracranial unruptured saccular aneurysms.
7.The predictive value of the level of inflammation markers derived from complete blood counts for the occurrence of first peritonitis in peritoneal dialysis patients
Jingyi XIE ; Ying YAO ; Shuwang GE ; Chong YU
Chinese Journal of Nephrology 2025;41(5):341-347
Objective:To explore the predictive value of baseline complete blood count derivative marker levels for the occurrence of the first peritonitis in patients undergoing peritoneal dialysis (PD).Methods:This study was a retrospective cohort study. The data of inpatients who underwent PD catheterization in Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology from April 1, 2005 to February 29, 2024 were collected and followed up until June 1, 2024. According to the 2022 International Society for Peritoneal Dialysis guidelines for peritonitis prevention and treatment, the patients were divided into the peritonitis group and the non-peritonitis group. Basic demographic data and laboratory parameters of the patients were collected, and inflammatory markers derived from complete blood count were calculated, including the comprehensive index of systemic inflammation, the systemic inflammation response index (SIRI), the ratio of hemoglobin to platelets (HPR), and the ratio of monocytes to lymphocytes (MLR). Cox regression analysis was conducted to identify factors associated with the occurrence of peritonitis.Results:A total of 824 PD patients aged ≥18 years were included in this study. Among them, there were 398 males (48.30%), with an age of 42.06 (33.04, 52.01) years, and the follow-up time was 595.00 (173.50, 1 158.00) d. The proportion of conversion to hemodialysis or death in the peritonitis group was higher than that in the non-peritonitis group (40.91% vs. 13.58%, χ 2=56.173, P<0.001). The age of the peritonitis group was greater than that of the non-peritonitis group [45.05(34.92, 52.99) year old vs. 41.11(32.89, 51.46) year old, Z=-1.978, P=0.048], and the follow-up time was lower than that in the non-peritonitis group [529.50(146.25, 861.00) d vs. 627.00(177.00, 1 222.50)d, Z=-2.260, P=0.024]. A multivariate Cox analysis model was constructed based on the univariate Cox analysis. After adjusting for covariates, the results showed the comprehensive index of systemic inflammation ( HR=0.997, 95% CI 0.995-0.998, P<0.001), HPR ( HR=0.520, 95% CI 0.271-0.995, P=0.048), MLR ( HR=7.027, 95% CI 1.468-33.636, P=0.015) and SIRI ( HR=2.673, 95% CI 1.302-5.488, P=0.007) were the related factors for the first occurrence of peritonitis. Conclusion:The levels of inflammatory markers derived from baseline complete blood count, especially MLR, SIRI and HPR, are the independent influencing factors for the occurrence of the first peritonitis in patients with PD.
8.Preliminary study on the implementation of HT for segmented TMLI in adults
Haiyang WANG ; Gaoxiang CHEN ; Xiang HUANG ; Ruigang GE ; Shilei ZHANG ; Changxin YAN ; Chuanbin XIE
China Medical Equipment 2025;22(9):21-26
Objective:To investigate the feasibility of segmented total marrow and lymphoid irradiation(TMLI)using Helical TomoTherapy(HT)in adults,and to analyze the impact of positional errors in the treatment on the actually received dose.Methods:Imaging data from four adult patients with acute myeloid leukemia were treated at the First Medical Center of the Chinese PLA General Hospital between November 2022 and December 2024 were retrospectively selected.The prescribed dose was 12 Gy in 3 fractions,and the heights range of patient was from 162 to 178 cm.The planning target volume(PTV)included the entire bone marrow and lymphatic drainage regions.The mid-femur was used as the dividing landmark,and the segmented location of head-in first(upper segmentation)and foot-in first(lower segmentation)were adopted to design plan for each segmentation.The upper segmentation used helical tomotherapy,and the lower segmentation used tomo direct therapy.The dosimetric parameters of planning target volume,and organ at risk(OAR)included eye lens,testicles and lungs were analyzed.The located computed tomography(CT)images of patients were used to simulate the changes of dosimetric parameters of each planning target region and OAR when the positions of patients moved 3,5,10 and 15 mm to outside of rack aperture.The changes of dose distribution of connection region of upper and lower segmentation were further analyzed.Results:The segmented irradiation technique can better achieve the cover(95%)of whole target region of TMLI under the condition of protecting normal organs.Under the condition with different position errors,the cover rate of the most of target region significant decreased.The largest dose of right lens increased 9.272%than primary under the 5 mm position error,and that of left and right lens increased respectively 40.199%and 67.898%under the 10 mm position error,and the max dose and mean dose of testicles increased respectively 5.847%and 5.240%under the 3mm position error.The mean dose of whole lung increased all under the error at different grades,which increased 3.021%under the 10mm position error.The non-uniformity of dose distribution of connection region increased after the position error was introduced,and the largest variation range reached to 4 Gy.Conclusion:The technique of segmented radiotherapy of Helical Tomotherapy has feasibility for TMLI of adult.But the error of the position of patients can reduce the cover of target region,and decrease the control rate for target region,and can lead to the occurrences of excessive doses on eye lens,testicles,lung and other OAR at the same time,which can increase the probability of occurring OAR injury.It should be high pay attention in treatment and implementation.
9.Association between serum magnesium level at catheter insertion and peritoneal dialysis technique failure in peritoneal dialysis patients
Jingyi XIE ; Ying YAO ; Shuwang GE ; Le WANG
Chinese Journal of Nephrology 2025;41(11):841-848
Objective:To explore the association between serum magnesium levels during catheterization in peritoneal dialysis (PD) patients and the failure of PD technology.Methods:It was a retrospective study. The baseline data, laboratory tests and clinical events of inpatients with end-stage renal disease aged ≥18 years who received PD catheterization for the first time from April 1, 2005 to February 29, 2024 were collected, and the follow-up was conducted until June 1, 2024. PD technique failure was defined as extubation for conversion to hemodialysis or patient death. The optimal cut-off value of serum magnesium (0.782 mmol/L) was determined based on the Youden index of the receiver operating characteristic curve for predicting the failure of PD technology. The patients were divided into high serum magnesium group and low serum magnesium group, and differences of baseline clinical data and follow-up outcomes between the two groups were compared. Kaplan-Meier method was used to compare the differences of PD technical survival rates between the two groups. Logistic regression model was used to analyze the related factors of baseline increased serum magnesium levels (0.785 mmol/L) in PD patients. Cox proportional hazards regression model was used to analyze the risk factors for the failure of PD technology.Results:A total of 706 PD patients were included in this study, with age of 43.89 (33.43, 53.70) years. Among them, 339 (48.02%) patients were male. The serum creatinine was (800.45±238.81) μmol/L. The follow-up time was 726.00 (216.00, 1 344.00) days. The incidence of peritonitis was 0.072 times per patient-year, and the failure rate of PD technique was 15.58% (110/706). There were 551 patients (78.05%) in the high serum magnesium group and 155 patients (21.95%) in the low serum magnesium group. Compared with the high serum magnesium group, the low serum magnesium group had significantly lower levels of serum creatinine ( t=-2.743, P=0.006), blood urea nitrogen ( t=-2.428, P=0.004), serum uric acid ( t=-2.346, P=0.005), red blood cell count ( t=-4.100, P<0.001), hemoglobin ( Z=-4.195, P<0.001), serum albumin ( t=-4.400, P<0.001), platelet count ( Z=-2.428, P=0.015), platelet-to-monocyte ratio ( Z=-2.541, P=0.011), serum calcium ( t=-7.463, P<0.001), serum phosphorus ( t=-3.052, P=0.001), prothrombin activity ( t=-3.052, P=0.005) and proportion of hyperphosphatemia ( χ2=6.924, P=0.009), and higher male proportion ( χ2=8.984, P=0.030), proportion of conversion to hemodialysis ( χ2=6.098, P=0.014), neutrophil percentage-to-albumin ratio ( Z=2.875, P=0.004), serum chloride ( Z=4.011, P<0.001), alkaline phosphatase ( Z=2.850, P=0.040), D-dimer ( Z=3.166, P=0.002), proportion of hypoalbuminemia ( χ2=7.543, P=0.006), and proportion of hypocalcemia ( χ2=39.836, P<0.001). Kaplan-Meier survival analysis showed that the PD technical survival rates in the peritonitis group and the low serum magnesium group were significantly lower than those in the control group and the high serum magnesium group, respectively (Log-rank test, χ2=9.332, P=0.002; χ2=7.856, P=0.005). Multivariate logistic regression analysis showed that the serum calcium ( OR=23.237, 95% CI 3.807-141.845) and serum chlorine level ( OR=0.919, 95% CI 0.858-0.985) were independently correlated with the increased serum magnesium. Multivariate Cox regression analysis showed that elevated baseline serum magnesium was an independent protective factor of PD technique failure ( HR=0.351, 95% CI 0.188-0.653). Conclusions:Elevated serum magnesium is an independent protective factor of PD technology failure. Maintaining an appropriate serum magnesium level may improve the prognosis of PD patients.
10.Artificial intelligence iterative reconstruction for low-dose chest CT images of infants with congenital heart disease
Minghua SUN ; Liying PENG ; Feifei ZHANG ; Yukun PAN ; Tong LI ; Jiliang ZHANG ; Ruigang XIE ; Yinghui GE
Chinese Journal of Medical Imaging Technology 2025;41(4):525-529
Objective To observe the value of artificial intelligence iterative reconstruction(AIIR)for low-dose chest CT images of infants with congenital heart disease.Methods Totally 262 infants with congenital heart disease who would undergo chest CT scanning were prospectively enrolled and randomly divided into low-dose group(n=142)and conventional dose group(n=120).Chest CT scanning with tube voltage of 80 kVp and tube current of 10 mAs was performed in low-dose group,and hybrid iterative reconstruction(HIR,group A)and AIIR(group B)were used to reconstruct images,respectively.In conventional dose group,chest CT scanning with tube voltage of 80 kVp and tube current of 100 mAs was performed,and HIR was used to reconstruct images(group C).Then subjective and objective evaluation on image quality were performed,the results were compared among 3 groups,and the value of AIIR was analyzed.Results Significant differences of image quality and clarity of displaying structures were found among 3 groups(all P<0.001).Among them,except for the clarity of interlobar fissure,no significant difference of subjective scores was found between low-dose AIIR images and conventional dose HIR images(all corrected P>0.05),while subjective scores of low-dose HIR images were all lower than those of low-dose AIIR images and conventional dose HIR images(all corrected P<0.05).Significant differences of standard deviation(SD),signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)were found among 3 groups(all P<0.001)and between each 2 groups(all corrected P<0.05).The effective dose of low-dose group and conventional dose group was 0.09(0.08,0.10)and 0.85(0.75,1.03)mSv,respectively,and the former was lower than the latter(Z=-13.942,P<0.001).Conclusion Using AIIR could obtain low-dose chest CT images of infants with quality comparable to conventional chest CT images.

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