The relationship of target area and lung volume ratio with prescription dose of IMRT for esophageal cancer / 中国辐射卫生

Objective To study the relationship between the ratio of target volume to lung volume and the prescription dose in intensity modulated radiation therapy (IMRT) for esophageal cancer, so as to help clinicians to choose the appropriate prescription dose according to the target situation. Methods 80 patients with esophageal cancer were randomly selected. The lesion range included all types of esophageal cancer, and the target area was outlined according to ICRU (International Commission Radiological Units) 50 and ICRU62. Set statistical parameters and plan objectives. Statistical analysis was performed according to the statistical results of the parameters. The critical value of volume ratio is obtained by fitting calculation. Results there was a positive linear correlation between volume ratio and lung V5, V20, V30 and average lung dose. The critical value of volume ratio is 10% for 60 Gy and 13% for 50 Gy. Conclusion according to the research results, it can be predicted that when the ratio of target volume to lung volume is more than 10%, the prescribed dose should not be higher than 60 Gy; when the ratio of target volume to lung volume is more than 13%, the prescribed dose should be selected cautiously, meanwhile in the condition of whose target volume exceeds lung segment the prescribed dose. This provides a reference for clinicians when choose the prescription dose and target range while making the target delineation.

Usefulness of white blood cell count to mean platelet volume ratio in predicting short term, 30 days major adverse cardiac events in patients presenting with acute coronary syndrome

Background: The role of white blood cell (WBC) to mean platelet volume (MPV) ratio (WMR) in predicting short-term major adverse cardiac events (MACE) in patients presenting with acute coronary syndrome (ACS) has not been studied extensively. We aimed to determine whether WMR can predict short-term (30 days) MACE in ACS patients.Methods: This hospital-based prospective cohort study was undertaken at a tertiary-care teaching hospital in India from January 2018 to December 2018. Fifty patients presenting with ACS to undergo primary percutaneous intervention were evaluated for WMR and short-term MACE.Results: Receiver operating characteristic (ROC) curve showed cut-off value of WMR as 1059 with area under the ROC curve of 0.825 (SE=0.074; 95% CI: 0.679-0.971; p=0.001). MACE was noted in 10 patients (20%) and mortality in 4 patients (8%). WMR with cut-off value of 1059 was significant and highly accurate in predicting MACE (diagnostic accuracy: 72%, sensitivity: 80%, specificity: 70%, positive predictive value: 40%, negative predictive value: 93.33%, p=0.016, and positive likelihood ratio: 2.67, negative likelihood ratio: 0.29). Risk of short-term MACE increases with higher respiratory rate, creatine kinase and creatine kinase myocardial band, alanine aminotransferase, WBC count, neutrophils, neutrophil to lymphocyte ratio, total bilirubin, aspartate aminotransferase, lymphocytes, uric acid, lower SBP, DBP, Troponin I, red blood cell count, and ejection fraction and clinical presentation such as, palpitations, sweating, giddiness, loss of consciousness, higher Killip class, and  diagnosis of  inferior wall myocardial infarction.Conclusions: Higher WMR values on admission (≥1059) are associated with worse short-term outcomes in patients with ACS and independently predict short-term MACE.

Efficacy of a combination of gadolinium?ethoxybenzyl?diethylenetriamine pentaacetic acid enhanced MR T1 mapping and liver volume to standard liver volume ratio for estimation of liver function / 中华放射学杂志

ObjectiveTo investigate the feasibility of a combination of gadolinium?ethoxybenzyl?diethylenetriamine pentaacetic acid (Gd?EOB?DTPA) enhanced MR T1 mapping and liver volume to standard liver volume ratio in quantitative assessment of liver function. Methods Eighty patients who underwent Gd?EOB?DTPA enhanced MR T1 mapping were prospectively enrolled, and the Child?Pugh score and the model for end?stage liver (MELD) score were evaluated and grouped. Patients were divided into three groups according Child?pugh score as follows: normal liver function (NLF, n=26), liver cirrhosis with Child?Pugh A (LCA,n=30), liver cirrhosis with Child?Pugh B+C (LCB+LCC, n=24), and were also divided into two groups according MELD, MELD≤8 (n=57) and MELD≥9 (n=23). Variable flip angle T1 mapping sequences were performed before and 20 minutes after Gd?EOB?DTPA administration. T1pre, T1 post were measured on T1 maps and ΔT1 were calculated. The images of hepatobiliary phase were transferred to the workstation to measure liver volume (LV). Standard liver volume (SLV) were calculated with the heights and weights of patients, and then liver volume to standard liver volume ratio (LV/SLV) was calculated. One?way ANOVA was used to compared the indexes (T1 post, T1 post×LV/SLV, ΔT1, ΔT1×LV/SLV) in different liver function groups of NLF,LCA,LCB+LCC. The t tests were used to compare the indexes(T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV) in MELD≤8 and MELD≥9 groups. ROC curve analysis was used to compare the diagnostic performance of T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV. Results T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV showed significant difference between different liver function groups (P<0.05). All the indexes can distinguish different groups. Multiplied by LV/SLV,the AUC of ΔT1×LV/SLV were 0.902 in the MELD≤8 and MELD≥9,which was slightly higher than that of ΔT1 (AUC=0.886). The AUCs of ΔT1×LV/SLV were 0.771, 1.000, 0.924 in the NLF and LCA, NLF and LCB+LCC, LCA and LCB+LCC groups, which were slightly higher than that of ΔT1 (0.764, 0.992, 0.904). The AUCs of T1post, T1post×LV/SLV were 0.824, 0.789 in the MELD≤8 and MELD≥9, respectively. The AUCs of T1post in the NLF and LCA, NLF and LCB+LCC, LCA and LCB+LCC groups were 0.713,0.987,0.915, respectively, and the AUCs of T1post×LV/SLV were 0.687,0.973,0.871.The AUCs of T1post×LV/SLV had a slightly lower AUC amongthe different liver function groups than T1post. Conclusion Gd?EOB?DTPA enhanced MRI T1 mapping is useful for estimating liver function. T1 relaxation times and reduction rates of T1 relaxation times with a combination of the LV/SLV may more reliably estimate liver function.

Efficacy of a combination of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid enhanced MR T1 mapping and liver volume to standard liver volume ratio for estimation of liver function / 中华放射学杂志

Objective@#To investigate the feasibility of a combination of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) enhanced MR T1 mapping and liver volume to standard liver volume ratio in quantitative assessment of liver function.@*Methods@#Eighty patients who underwent Gd-EOB-DTPA enhanced MR T1 mapping were prospectively enrolled, and the Child-Pugh score and the model for end-stage liver (MELD) score were evaluated and grouped. Patients were divided into three groups according Child-pugh score as follows: normal liver function (NLF, n=26), liver cirrhosis with Child-Pugh A (LCA,n=30), liver cirrhosis with Child-Pugh B+C (LCB+LCC, n=24), and were also divided into two groups according MELD, MELD≤8 (n=57) and MELD≥9 (n=23). Variable flip angle T1 mapping sequences were performed before and 20 minutes after Gd-EOB-DTPA administration. T1pre, T1 post were measured on T1 maps and ΔT1 were calculated. The images of hepatobiliary phase were transferred to the workstation to measure liver volume (LV). Standard liver volume (SLV) were calculated with the heights and weights of patients, and then liver volume to standard liver volume ratio (LV/SLV) was calculated. One-way ANOVA was used to compared the indexes (T1post, T1 post×LV/SLV, ΔT1, ΔT1×LV/SLV) in different liver function groups of NLF,LCA,LCB+LCC. The t tests were used to compare the indexes (T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV) in MELD≤8 and MELD≥9 groups. ROC curve analysis was used to compare the diagnostic performance of T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV.@*Results@#T1post, T1post×LV/SLV, ΔT1, ΔT1×LV/SLV showed significant difference between different liver function groups (P<0.05). All the indexes can distinguish different groups. Multiplied by LV/SLV,the AUC of ΔT1×LV/SLV were 0.902 in the MELD≤8 and MELD≥9,which was slightly higher than that of ΔT1 (AUC=0.886). The AUCs of ΔT1×LV/SLV were 0.771, 1.000, 0.924 in the NLF and LCA, NLF and LCB+LCC, LCA and LCB+LCC groups, which were slightly higher than that of ΔT1 (0.764, 0.992, 0.904). The AUCs of T1post, T1post×LV/SLV were 0.824, 0.789 in the MELD≤8 and MELD≥9, respectively. The AUCs of T1post in the NLF and LCA, NLF and LCB+LCC, LCA and LCB+LCC groups were 0.713,0.987,0.915, respectively, and the AUCs of T1post×LV/SLV were 0.687,0.973,0.871.The AUCs of T1post×LV/SLV had a slightly lower AUC amongthe different liver function groups than T1post.@*Conclusion@#Gd-EOB-DTPA enhanced MRI T1 mapping is useful for estimating liver function. T1 relaxation times and reduction rates of T1 relaxation times with a combination of the LV/SLV may more reliably estimate liver function.

Comparative study of right to left ventricular volume ratio measured on chest CT and echocardiography in the diagnosis of pulmonary artery pressure before lung transplantation / 中华器官移植杂志

Objective To investigate the correlation of right ventricular (RV) to left ventricular (LV) volume ratio (RVv/LVv) measured by chest CT with pulmonary arterial pressure estimated by echocardiography before lung transplantation.Methods We reviewed 104 cases of lung transplant.According to the mean pulmonary arterial pressure (mPAP) exceeding 25 mmHg by right heart catheterization,hypertensive group (n =74) and normotensive group (n =30) were set up.Risk factors were assessed individually and adjusted for confounding by a multivariable logistic regression analysis.The area under the curve (AUC) for predicting pulmonary hypertension on chest CT and echocardiography was calculated.Results RVv/LVv and echocardiography-derived ptlmonary arterial systolic pressure (PASP) were significantly different between the two groups (P ＜ 0.05).In the hypertensive group,there was strong correlation between the RVv/LVv and PASP from catheterization (R =0.82,P＜0.001),also between the P ASP from echocardiography and catheterization (R =0.60,P＜ 0.001).The ROC curve displayed that with 0.85 as the cutoff for RVv/LVv,the sensmitivity,specificity and accuracy rate for predicting mPAP over 25 mmHg were 87.5％,91.8％ and 90.9％,respectively.The ROC curve also displayed that based upon an echocardiography-derived PASP of 35 mmHg as the cutoff point,the sensitivity,specificity and accuracy rate for predicting mPAP over 25 mmHg were 91.2％,90.8％ and 88.4％,respectively.Conclusion RV/LV volume ratios on chest CT and echocardiographic evaluation correlate well with PASP assessed by right heart catheterization and can be used to predict pulmonary hypertension with high sensitivity and specificity.

Predictive value of spleen-liver volume ratio on the prognosis of partial hepatectomy in patients with hepatocellular carcinoma / 中国综合临床

Objective To explore the predictive value of spleen?liver volume ratio( SLVR) on the prog?nosis of partial hepatectomy in patients with hepatocellular carcinoma. Methods Clinical data of 86 cases of hepatocellular carcinoma underwent hepatectomy who were treated in the Traditional Chinese Medicine Hospital of Guangzhou from January 2009 to December 2014 were analyzed retrospectively. According to the preoperative spleen?liver volume ratio,these patients were divided into 2 groups:those with SLVR5 cm,the number of tumor>3,por?tal vein or hepatic vein tumor thrombus,preoperative AFP?L3%≥10%,the rate of Invasion of blood vessels and the percentage of positive margins of high SLVR group all significantly lower than that of low SLVR group (25. 0%(11/44) vs. 59. 5%(25/42),22. 7%(10/44) vs. 54. 8%(23/42),9. 1%(4/44) vs. 26. 2%(11/42),38. 6%(17/44) vs. 78. 6%(33/42),18. 2%(8/44) vs. 38. 1%(16/42),2. 3%(1/44) vs. 14. 3%(6/42);χ2=20. 645,16. 180,24. 728,4. 819,18. 402,20. 105;P5 cm,SLVR ≥0. 8,AFP?L3≥10%,and portal vein or hepatic vein tumor thrombus were independent predictors of poor disease?free survival after hepatectomy for hepatocellular carcinoma( Or=6. 141, 3. 753,6. 968,7. 763;P<0. 05). Conclusion Preoperative SLVR ≥0. 8 is an independent adverse predictor of poor disease?free survival,can preliminarily predict the prognosis of patients with hepatocellular carcinoma.

Theoretical distribution of gutta-percha within root canals filled using cold lateral compaction based on numeric calculus / 华中科技大学学报（医学）（英德文版）

This study aimed to present a new method based on numeric calculus to provide data on the theoretical volume ratio of voids when using the cold lateral compaction technique in canals with various diameters and tapers. Twenty-one simulated mathematical root canal models were created with different tapers and sizes of apical diameter, and were filled with defined sizes of standardized accessory gutta-percha cones. The areas of each master and accessory gutta-percha cone as well as the depth of their insertion into the canals were determined mathematically in Microsoft Excel. When the first accessory gutta-percha cone had been positioned, the residual area of void was measured. The areas of the residual voids were then measured repeatedly upon insertion of additional accessary cones until no more could be inserted in the canal. The volume ratio of voids was calculated through measurement of the volume of the root canal and mass of gutta-percha cones. The theoretical volume ratio of voids was influenced by the taper of canal, the size of apical preparation and the size of accessory gutta-percha cones. Greater apical preparation size and larger taper together with the use of smaller accessory cones reduced the volume ratio of voids in the apical third. The mathematical model provided a precise method to determine the theoretical volume ratio of voids in root-filled canals when using cold lateral compaction.

Preoperative spleen-liver volume ratio predicts the risk of liver cancer recurrence after hepatectomy / 中华普通外科杂志

Objective To explore the value of preoperative spleen-liver volume ratio for predicting recurrence of primary liver cancer after hepatectomy.Methods Clinical data of 75 cases of hepatocellular carcinoma undergoing hepatectomy were analyzed retrospectively.According to the preoperative spleen-liver volume ratio,these patients were divided into 2 groups:those with spleen-liver volume ratio ＜ 0.8,and spleen-liver volume ratio≥0.8.Patients were followed-up until March 2014.Cox ratio risk pattern analysis was used for the recurrent correlative factors.Results Univariate analysis showed that preoperative AFPL3％ ≥ 10％,the maximum diameter of the tumor ＞ 5 cm,the number of tumor ＞ 3,spleen-liver volume ratio ≥0.8,vascular invasion,positive resection margin and hepatic or portal vein tumor thrombus were all risk factors of poor disease-free survival (P ＜ 0.05).Cox regression analysis revealed that spleen-liver volume ratio ≥0.8,AFP-L3％ ≥10％,the maximum diameter of the tumor ＞5 cm and hepatic or portal vein tumor thrombus were independent predictors of poor disease-free survival after hepatectomy for hepatocellular carcinoma(P ＜ 0.05).Conclusions Preoperative spleen-liver volume ratio ≥0.8 was an independent adverse predictor of poor disease-free survival.

Size-associated Variation and Factors Affecting the Morphology of Brown Bodies in Glycera tridactyla (Polychaeta:Glyceridae)

Size-associated variations in brown body morphology (size and shape) were studied from the individuals of Glycera tridactyla. Variables related to size, length (BL) and width (BW) of the brown bodies were measured. On the basis of these measurements, other variables such as the surface area (SA), volume (V), surface area/volume ratio (SA/V) and elongation degree (ED) were calculated. Brown body shape was quantified by the elongation degree. The immature brown bodies were significantly smaller than the mature bodies, and therefore the smaller bodies had a higher SA/V. Results obtained from the regression analysis showed that there was a significant relationship between all the variables with the exception of SA/V:BW for the immature bodies and ED: BL for both groups of the bodies. The body size (proboscis length) of the worm and the sampling time (months) were the affecting factors on size and shape of the brown body. Brown bodies tend to be elongated as the proboscis length increased. The variation in size and/or shape of the brown bodies could refer to an adaptation to the movement along the coelomic fluid.

Comparison the diagnosis of chronic hepatic fibrosis and cirrhosis with ADC value of the liver and the liver-spleen volume ratio examined by MR / 实用放射学杂志

Objective To investigate the relationship and compare the diagnosis in chronic hepatic fibrosis and cirrhosis between liver ADC value and the liver spleen volume ratio changes by MR.Methods The obj ect included 3 1 cases of chronic hepatic fibrosis, cirrhosis and 14 cases of control group.The liver ADC value (b=800 s/mm2 )and the liver spleen volume ratio in different fibrosis stages were measured.Analysis of variances was performed to compare the difference between the two groups.Results The right lobe of liver ADC value and the liver spleen volume ratio in each group was significant (P<0.01).With the increase of fibrosis score,liver ADC was correlated negatively.From normal to mild cirrhosis (S1-S2),the total liver volume increased progressively. From severe hepatic fibrosis to advanced cirrhosis (S3-S4),it decreased slowly and spleen volume increased gradually along as cir-rhosis degree,while the liver spleen volume ratio correspondingly decreased.Area under the curve (AUC)in the group of liver ADC value was 0.789,sensitivity was 0.806,and specificity was 0.857.The group of liver spleen volume ratio AUC was 0.744,sensi-tivity was 0.742,and specificity was 0.714.Conclusion The correlation of the two methods for evaluating the effectiveness of liver fibrosis and cirrhosis are both significant.Whereas,ADC value was better for liver fibrosis,which is the best method for diagnosis of early liver fibrosis.

Preparation technology of Yinqiao Jiedu Soft Capsule / 中草药

Objective: To optimize the content prescription and preparation technology of Yinqiao Jiedu Soft Capsule. Methods: Formula and preparation technology were evaluated by viscosity and sedimentation volume ratio of the contents and optimized by L9(34) orthogonal test. Results: Soybean oil was chosen as the diluent and extracting powder was passed through 120-mesh sieve. The prescription containing 5% beeswax as suspending agent and 3% Polysorbate 80 as moistening agent showed the best stability. Conclusion: The preparation technology for Yinqiao Jiedu Soft Capsule is stable and the quality is controllable. It is suitable for industrial production.

Preparation Technology of Cefixime Suspension and the Influencing Factors of Its Sedimentation Volume Ratio / 中国药房

OBJECTIVE:To optimize the preparation technology of cefixime suspension and study its stability.METHODS:The effects of hydroxypropyl cellulose,xanthan gum and sodium lauryl sulfate in different proportions on the sedimentation volume ratios of the suspensions were investigated by orthogonal experiments to optimize the preparation technology.The stability of the preparation was studied by accelerated test.RESULTS:The optimum preparation technology for cefixime suspension was as follows:the proportions of sodium dodecylsulfate,xanthan gum,and hydroxy-propyl methyl cellulose(HPMC) were 10%,20%,and 15%,respectively.The prepared suspension had simple formula and good stability,with all indexes up to the quality specification for suspension.CONCLUSION:The suspension prepared in accordance with this formula was able to meet the requirements of Chinese Pharmacopoeia on dry suspension.