1.Half quantitative diagnosis of high-risk gastrointestinal stromal tumors with multi-slice spiral CT
Chinese Journal of Medical Imaging Technology 2010;26(3):517-520
Objective To study the half quantitative diagnostic method of the high-risk gastrointestinal stromal tumors (GISTs) with analyzing the characteristic of high-risk and lower risk GISTs with multi-slice spiral CT (MSCT). Methods CT findings of 46 patients with 51 GIST lesions were retrospectively analyzed. The location, size, shape, boundary, growth pattern and other specialties of the tumors in high-risk and lower risk GISTs were studied, moreover statistical analysis was conducted, logistic regression equation was obtained. Results Significant difference was found in tumors' location, size, shape, boundary and distant metastasis between the two types of GISTs. There were obvious correlation between the risk level and tumors' size and boundary which could be used to build the diagnostic equation of high-risk GISTs. Conclusion The equation ln [P/(1-P)]=-2.612X_3+0.371X_5 (X_3:tumors' boundary, X_5:tumors' size) is valuable in the diagnosis of high-risk GISTs.
2.A method to optimize the selection of tube current for consistent image noise and dose control in 64-slice spiral helical CT cardiac imaging
Weiwei QI ; Xingke DU ; Ying GUO
Chinese Journal of Radiology 2008;42(10):1026-1030
Objective To establish and clinically evaluate a method to adjust tube current(mA)individually for obtaining images with consistent noise and optimized radiation dose in 64-slice spiral helical CT coronary angiography.Methods (1)80 patients,as a control group,were underwent CT coronary angiography(CTCA)using 64-muhislice spiral helical CT with fixed mA(650 mA).Two radiologists first assessed image quality of the fixed mA group by scoring from 1 to 5.A minimal dose requirement for meeting clinical diagnosis with the desired noise level(standard deviation SD0)were decided.By analyzing the images of the control group,we also established correlation between the image noises of timing bolus(TB)scans and cardiac(CA)scans and set up a formula to predict the required mA value for obtaining the desired cardiac image noise for individual patient.(2)Subsequently,another group of 80 patients(study group)wero scanned with individually adjusted mA using the established formula and the practicability of this method was then evaluated.The independent sample t test was used to compare the values of the two groups.Results (1)The noise of TB and CTCA scans was linearly correlated with r2=0.994. (2)A cardiac image noise level of 28 HU was found to be adequate for clinical diagnostic purpose based on the image quality analysis.(3)The average noise for the acquired cardiac images was found to be 28.97 HU for the study group with individually adapted mA using the established formula.The standard deviation of the image noisein study group was 1.93,which was much smaller than 5.14 in the fixed mA group,but the average image scores for the study group(4.27±0.68)and fixed group mA(4.03 4-0.93)were not statistically different.(4)In the study group,63 out of 80 patients required tube currents below the standard 650 mA,yielding an average CTDIvol of58.32 mGy,which was about 32.1%dose reduction than that of fixed mA(85.94 mGy).The lowest CTDIvol was 19.27 mGy with 160 mA which was 22.4%of the average CTDIvol in control group.Conclusion Adjusting mA individually based on timing bolus scan noise analysis is an accurate and practical method to obtain consistent image quality for different cardiac pailents and to minimize the radiation dose for individuals compared to the fixed mA.
3.The causes and imaging diagnosis of congenital pyriform sinus fistula in children
Chuangao YIN ; Zifeng SHI ; Weiwei QI
Journal of Practical Radiology 2015;(10):1684-1686
Objective To probe the cause,clinical and imaging findings of children's congenital pyriform sinus fistula (CPSF). Methods Clinical and radiographic data in 23 patients with children’s CPSF were analyzed retrospectively which were confirmed by pathology.Results 1 6 patients represented repeated swelling and pain in left anterior neck,6 of whom were misdiagnosed as thyroid abscess and suffered surgery.7 patients represented masses in left anterior neck.Ultrasound showed all patients with diffuse en-larged thyroid gland with uneven mass and separated liquid dark space or infection in deep neck soft tissue,and no CPSF was identi-fied.The subsequent esophageal barium meal confirmed the fistula in 8 patients,and other patients underwent further CT scan with image post-processing.CT showed clear fistula in 4,suspicious fistula in 7 and no fistula in 4,All fistulas were confirmed by the pa-thology.Conclusion The combination of ultrasound,esophagogram and CT with image post-processing can improve the diagnostic sensitivity and accuracy of CPSF.
4.Analysis of the results of chest health examination by digital radiography in 1449 cases
Sai QI ; Weiwei ZUO ; Guodong CHEN
Chinese Journal of Primary Medicine and Pharmacy 2012;19(12):1763-1764
Objective To analyze the application value of digital radiography (DR) on healthy population.Methods 1449 cases of health examination on chest by DR were retrospectively studied,the physical examination results were analyzed.Results The medical examination of positive rate was 4.9%.The positive rate of women was higher than men ( x2 =11.493,P =0.001 ).the top 5 detection rate of diseases were lung old lesions,pneumonia,suspicious tumor,thickening and adhesion of pleural,senile pulmonary.Conclusion The DR examination was selected according to symptoms,medical history of participate in the examination,the check frequency was selected according to age.
5.Clinical analysis of 35 cases of adult henoch schonlein purpura
Weiwei QI ; Rong FU ; Zonghong SHAO
Chinese Journal of Practical Internal Medicine 2001;0(02):-
Objective To examine the epidemiological and clinical features of the adults with Henoch Schonlein Purpura (HSP),and improve the diagnosis and therapeutic efficacy of HSP.Methods Thirty five adults with HSP from the hematological department of Tianjin Medical University General Hospital between 1993.9 to 2005.12 were enrolled in this study.Epidemiological,clinical and laboratory data,therapeutic methods and efficacy were investigated.Results Most patients with HSP in our department were male and adolescent.HSP occurred more commonly in the winter.The important predisposing factors were infection and having specific food.Purpuric lesions were the most common presenting signs.Multiple organ involvement was more common.Purpura was present in all case,lower extremities were more commonly involved.Joint involvement was observed in 15 cases(42.9%),abdominal involvement in 20 cases(57.1%),renal involvement in 20 cases(57.1%).Conclusion The adult patients with HSP had more tendenecy to have severe renal damage and multiple organ involvement.
6.Clinical efficacy of L-carnitine in prevention and treatment of toxicity of LFP chemotherapy with gastrointestinal cancer
Jingjuan ZHU ; Weiwei QI ; Wensheng QIU ; Aiping DING
Cancer Research and Clinic 2012;24(7):463-465
ObjectiveTo observe the efficacy of L-carnitine in prevention and treatment of toxicity of LFP chemotherapy with gastrointestinal cancer. Methods60 cases of gastrointestinal cancer were divided into 2 groups according to the admission date. The treatment groups received LFP chemotherapy and L-carnitine, while the control group received LFP chemotherapy alone.Both groups received 3 cycles chemotherapy. The gastrointestinal toxicity, neurotoxicity, hematologic toxicity and physical state were compared.ResultsThere were 12 cases of peripheral neurotoxicity in treatment group,the incidence rate was 40.0 %;but in control group there were 21 patients, and the incidence rate was 70.0 %. There was a significant difference between the two groups(x2=5.4545,P =0.0195). Anemia in the treatment group was 56.7 % (17/30); in the control group the rate was 86.7 % (26/30).There was a significant difference between the two groups (x2 =6.698,P =0.0351).After chemotherapy,in the treatment group,there were 4 cases with increasing Karnofsky score ≥ 10,19 patients whose Karnofsky score did not change,and 7 cases with reduced Karnofsky score ≥ 10; in the control group,there was 1 case with increasing Karnofsky score ≥ 10,13 cases with Karnofsky score no changing,and 16 cases with reduced Karnofsky score ≥ 10.The changes in physical state of two groups had a significant difference(x2 =5.711,P =0.0169).The gastrointestinal toxicity,thrombocytopenia,and neutropenia of two groups had no significant difference.ConclusionL-carnitine can reduce peripheral neurotoxicity and hematologic toxicity,improve the patient's physical state in patients received LFP chemotherapy.
7.Clinical investigation of the correlation between metabolic syndrome and chronic kidney disease
Qi BIAN ; Weijie YUAN ; Weiwei LU ; Hanyang YE ; Ruolan GUI
Chinese Journal of Nephrology 2005;0(07):-
25 is also an important impact factor among various components.
8.Effects of Xuebijing on intestinal function and inflammatory responses in patients with severe burn
Chen CAI ; Qinglian XU ; Hong HU ; Yizhong TANG ; Weiwei QI
Chinese Journal of Emergency Medicine 2010;19(12):1317-1319
Objective To investigate the effects of Xuebijing injectio (Chinese herb preparation) on intestinal function and inflammatory responses in severe burn patients. Method Thirty-two patients with comparable severity in burn injury were randomly divided into Xuebijing injectio treatment group (n = 16) and control group (n = 16). Patients in both groups received routine burn therapy, while those in Xuebijing treatment group additionally received Xuebijing injectio 100mL in intravenous drip twice a day for 7 days. Before the treatment and on the 3rd and the 7th day after the treatment, blood concentrations of diamine oxidase (DAO), lipopolysaccharide (LPS) ,tumor necrosis factor-α(TNF-α) and interleukin-6 (IL-6) were determined in both groups. Analysis was made by SPSS 12.0 software. Results The plasma levels of DAO, LPS, TNF-α and IL-6 were decreased in both groups after the treatment. However, the plasma levels of DAO, LPS, TNF-α and IL-6 in the Xuebijing treatment group were significantly lower than those in control group on the 3rd and 7th day after the treatment (P< 0.05).Conclusions Xuebijing injectio could protect intestinal function, decrease the plasma level of endotoxin and lessen zhe inflammatory responses in severe burn patients.
9.Dynamic changes of the CT perfusion parameters in the embolic model of cerebral ischemia.
Weiwei, CHEN ; Jianpin, QI ; Jinhua, ZHANG ; Wenhua, HUANG ; Jinmei, SONG
Journal of Huazhong University of Science and Technology (Medical Sciences) 2004;24(6):615-7
To study the dynamic changes of CT perfusion parameters during the first 12 h in the embolic cerebral ischemia models. Local cerebral ischemia model were established in 7 New Zealand white rabbits. All CT scans were performed with a GE Lightspeed 16 multislice CT. Following the baseline scan, further CT perfusion scans were performed at the same locations 20 min, 1-6 h and 8, 10 and 12 h after the embolus delivery. Maps of all parameters were obtained by CT perfusion software at each time point. The brains, taken 12 h after the scan, were sliced corresponding to the positions of the CT slices and stained by 2,3,5-triphenyltetrazolium chloride (TTC). On the basis of the TTC results, the ischemic sides were divided into 3 regions: core, penumbra and the relatively normal region. The changes of all parameters were then divided into 3 stages. In the first two hours (the first stage), the CBV dropped more remarkably in the core than in the penumbra but rose slightly in the relatively normal region while the CBF decreased and MTT, TTP extended in all regions to varying degrees. In the 2nd-5th h (the second stage), all the parameters fluctuated slightly around a certain level. In the 5th-12th h (the third stage), the CBV and CBF dropped, and MTT and TTP were prolonged or shortened slightly in the core and penumbra though much notably in the former while the CBV, CBF rose and MTT, TTP were shortened remarkably in the relatively normal region. We experimentally demonstrated that the location and extent of cerebral ischemia could be accurately assessed by CT perfusion imaging. The pathophysiology of the ischemia could be reflected by the CT perfusion to varying degrees.
Blood Flow Velocity
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Brain Ischemia/physiopathology
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Brain Ischemia/*radiography
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Cerebrovascular Circulation
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Stroke/physiopathology
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Tomography, X-Ray Computed
10.Influence of probucol combined atorvastatin on blood viscosity,TCD indexes and carotid plaque stabili-ty in patients with large artery-derived cerebral infarction
Shanshan QI ; Zhaohu FU ; Weiwei BAI ; Di WU
Chinese Journal of cardiovascular Rehabilitation Medicine 2017;26(1):86-90
Objective:To explore influence of probucol combined atorvastatin on blood viscosity ,transcranial Doppler (TCD) indexes and carotid plaque stability in patients with large artery‐derived cerebral infarction .Methods :A total of 100 patients with large artery‐derived cerebral infarction treated in our hospital from Apr 2014 to Apr 2016 were selected .According to random number table ,patients were randomly and equally divided into atorvastatin group (received atorvastatin based on routine treatment ) and combined treatment group (received probucol based on atorv‐astatin group) ,both groups were treated for six months .Related indexes before and after treatment were compared between two groups .Results :Compared with atorvastatin group after treatment ,there were significant reductions in levels of TC ,TG and LDL‐C ,and significant rise in HDL‐C level (P<0.01 all);significant reductions in whole blood high shear viscosity [(6.23 ± 0.38) mPa/s vs .(4.20 ± 0.42) mPa/s] ,whole blood low shear viscosity [(21.17 ± 5.83) mPa/s vs .(18.10 ± 4.44) mPa/s] ,plasma viscosity [ (2.10 ± 0.45) mPa/s vs .(1.72 ± 0.34) mPa/s] and fibrinogen (Fg) level [(4.35 ± 1.36) g/L vs .(3.30 ± 1.38) g/L] ,P<0.01 all;significant rise in systolic blood flow velocity (Vs) [left :(87.43 ± 14.56) cm/s vs .(95.45 ± 18.37) cm/s]and mean blood flow velocity (Vm) [left :(60.89 ± 16.03) cm/s vs .(75.38 ± 19.36) cm/s]of left and right MCA ,significant reduction in pulsatility index(PI) [(0.85 ± 0.22) vs .(0.75 ± 0.12)] , P<0.05 or <0.01;significant reductions in unstable plaque score [(4.93 ± 0.40) scores vs .(4.12 ± 0.35) scores]and recurrence rate of cerebral infarction (16.00% vs .2.00% ) in combined treatment group ,respectiely P=0.001 ,0.014. Conclusion:Probucol combined atorvastatin can significantly reduce blood viscosity ,significantly improve hemodynamics in patients with large artery‐derived cerebral infarction .Its an‐ti‐atherosclerosis effect is obvious ,therefore it can be used to prevent or reduce recurrence of cerebral infarction .