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Fang H, Walton S, Delahaye E, Harris J, Storchak DA, Chen M. Categorical Colormap Optimization with Visualization Case Studies. IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2017; 23:871-880. [PMID: 27875201 DOI: 10.1109/tvcg.2016.2599214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Mapping a set of categorical values to different colors is an elementary technique in data visualization. Users of visualization software routinely rely on the default colormaps provided by a system, or colormaps suggested by software such as ColorBrewer. In practice, users often have to select a set of colors in a semantically meaningful way (e.g., based on conventions, color metaphors, and logological associations), and consequently would like to ensure their perceptual differentiation is optimized. In this paper, we present an algorithmic approach for maximizing the perceptual distances among a set of given colors. We address two technical problems in optimization, i.e., (i) the phenomena of local maxima that halt the optimization too soon, and (ii) the arbitrary reassignment of colors that leads to the loss of the original semantic association. We paid particular attention to different types of constraints that users may wish to impose during the optimization process. To demonstrate the effectiveness of this work, we tested this technique in two case studies. To reach out to a wider range of users, we also developed a web application called Colourmap Hospital.
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Wen F, Yang Y, Sun C, Fang H, Nie L, Li L, Liu Y, Yang Z. RESISTIN INHIBITS GLUCOSE-STIMULATED INSULIN SECRETION THROUGH MIR-494 BY TARGET ON STXBP5. ACTA ENDOCRINOLOGICA-BUCHAREST 2017; 13:32-39. [PMID: 31149145 DOI: 10.4183/aeb.2017.32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Aims Resistin has been reported to impair the pancreatic beta cells and associated with insulin resistance. MicroRNAs (miRNAs) are short, endogenously produced non-coding ribonucleotides that bind mRNAs and function mainly as negative regulators in mammals. MiRNAs have been implicated in many diseases, including insulin resistance and diabetes. A considerable body of evidence has indicated an important function for miRNAs in insulin secretion. The current study was designed to investigate the effects of miR-494 in the reductions in insulin secretion attributable to resistin. Methods Insulin secretion was determined by ELISA, and expressions of genes were identified using quantitative RT-PCR (qRT-PCR) or Western blot analysis. Results Insulin secretion was significantly reduced by resistin. Overexpression of miR-494 inhibited insulin secretion both in diet culture and high glucose medium in MIN6 cell lines. MiR-494 down-regulated the protein level of STXBP5 by pairing with sites in the 3'UTR. Conclusion miR-494 is involved in the insulin secretion regulated by resistin via its effects on STXBP5 in MIN6 cells.
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Wang X, Jin J, Zhao D, Tang Y, Ren H, Fang H, Li N, Li Y. A Phase I/II Study of Concurrent S-1 and Intensity Modulated Radiation Therapy as Adjuvant Treatment for Locally Advanced Gastroesophageal and Gastric Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ren H, Liu L, Feng Y, Wang W, Wang J, Wang J, Li G, Li G, Wang W, Wang S, Song Y, Wang X, Tang Y, Li N, Liu Y, Fang H, Yu Z, Li Y, Zhu Y, Jin J. Acute Toxicities Comparison of Postoperative Chemoradiation Therapy With Capecitabine and Oxaliplatin Versus Capecitabine Alone for Pathological Stage II and III Rectal Cancer: A Randomized Multicenter Phase 3 Trial. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Tang Y, Jin J, Li S, Li N, Ren H, Zhang H, Zhou Z, Liang J, Zheng Z, Zhao D, Zhang H, Zou S, Fang H, Chi Y, Yang L, Wang W, Song Y, Liu Y, Wang S, Li Y, Liu S, Li G, Wang X, Wang W, Fan L, Zhu Y. The Initial Results for a Phase 3 Study of Short-Term Versus Long-Term Chemoradiation Therapy in Locally Advanced Rectal Cancer (STELLAR Trial). Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Zheng Y, Jiang L, Xu N, Xiao C, Hu Y, Wang X, Chen L, Fang H, Zhu J. Metallothionein 1H functions as a tumor suppressor in hepatocellular carcinoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw362.04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Li S, Fang H, Wang KW. Recoverable and Programmable Collapse from Folding Pressurized Origami Cellular Solids. PHYSICAL REVIEW LETTERS 2016; 117:114301. [PMID: 27661691 DOI: 10.1103/physrevlett.117.114301] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 06/06/2023]
Abstract
We report a unique collapse mechanism by exploiting the negative stiffness observed in the folding of an origami solid, which consists of pressurized cells made by stacking origami sheets. Such a collapse mechanism is recoverable, since it only involves rigid folding of the origami sheets and it is programmable by pressure control and the custom design of the crease pattern. The collapse mechanism features many attractive characteristics for applications such as energy absorption. The reported results also suggest a new branch of origami study focused on its nonlinear mechanics associated with folding.
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Zhang J, Fang H, Dang E, Li Q, Wang G. 310 T cell epitopes of BPAG2 antigen and the epitope-based pathogenesis of bullous pemphigoid. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cai L, Gu J, Zheng J, Zheng M, Wang G, Xi LY, Hao F, Liu XM, Sun QN, Wang Y, Lai W, Fang H, Tu YT, Sun Q, Chen J, Gao XH, Gu Y, Teixeira HD, Zhang JZ, Okun MM. Efficacy and safety of adalimumab in Chinese patients with moderate-to-severe plaque psoriasis: results from a phase 3, randomized, placebo-controlled, double-blind study. J Eur Acad Dermatol Venereol 2016; 31:89-95. [PMID: 27504914 PMCID: PMC5215651 DOI: 10.1111/jdv.13746] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/30/2016] [Indexed: 12/31/2022]
Abstract
Background This phase 3 trial is the first to evaluate the efficacy and safety of treatment with the systemic TNF‐α inhibitor, adalimumab, for Chinese patients with moderate‐to‐severe plaque psoriasis. Methods In the 12‐week, double‐blind, placebo‐controlled Period A, patients were randomized 4 : 1 to receive adalimumab 40 mg every‐other‐week (following a single 80 mg dose), or placebo every‐other‐week. In the subsequent 12‐week, open‐label, Period B, all patients received adalimumab 40 mg every‐other‐week starting at week 13, following a single, blinded dose at week 12 of adalimumab 80 mg or matching placebo (for patients receiving placebo or adalimumab in Period A respectively). In Period A, efficacy was analysed for all randomized patients and safety for all patients receiving ≥1 dose of the study drug. Results For the 425 patients in this study (87 placebo; 338 adalimumab), a higher percentage randomized to adalimumab achieved the primary endpoint of ≥75% improvement from baseline in PASI score (PASI 75) at week 12: placebo 11.5% (10/87); adalimumab 77.8% (263/338; P < 0.001). Physician's Global Assessment of clear to minimal was achieved at week 12 by 14.9% placebo (13/87) and 80.5% adalimumab (272/338; P < 0.001). For patients who received adalimumab at any time during the study (All‐adalimumab Population), treatment‐emergent adverse events (AEs) were reported by 63.4%; the most common was upper respiratory infection (16.1%). Serious AEs were reported by 3.5% of the All‐adalimumab Population, and serious infectious AEs by 1.2%, which include lung infection, pneumonia and tuberculosis [2 (0.5%) patients each]. There was one death (chronic heart failure). Conclusion In these Chinese patients with moderate‐to‐severe psoriasis, a significantly greater percentage treated with adalimumab compared with placebo achieved efficacy endpoints at week 12 and efficacy was sustained to week 24. Safety results were consistent with the known adalimumab safety profile; no new safety signals were identified in the 24 weeks of treatment.
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Fang H, Xiao K, Li Y, Yu F, Liu Y, Xue B, Tian Z. Intact Protein Quantitation Using Pseudoisobaric Dimethyl Labeling. Anal Chem 2016; 88:7198-205. [PMID: 27359340 DOI: 10.1021/acs.analchem.6b01388] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Protein structural and functional studies rely on complete qualitative and quantitative information on protein species (proteoforms); thus, it is important to quantify differentially expressed proteins at their molecular level. Here we report our development of universal pseudoisobaric dimethyl labeling (pIDL) of amino groups at both the N-terminal and lysine residues for relative quantitation of intact proteins. Initial proof-of-principle study was conducted on standard protein myoglobin and hepatocellular proteomes (HepG2 vs LO2). The amino groups from both the N-terminal and lysine were dimethylated with HXHO (X = (13)C or C) and NaBY3CN (Y = H or D). At the standard protein level, labeling efficiency, effect of product ion size, and mass resolution on quantitation accuracy were explored; and a good linear quantitation dynamic range up to 50-fold was obtained. For the hepatocellular proteome samples, 33 proteins were quantified with RSD ≤ 10% from one-dimensional reversed phase liquid chromatography-tandem mass spectrometry (RPLC-MS/MS) analysis of the 1:1 mixed samples. The method in this study can be extended to quantitation of other intact proteome systems. The universal "one-pot" dimethyl labeling of all the amino groups in a protein without the need of preblocking of those on the lysine residues is made possible by protein identification and quantitation analysis using ProteinGoggle 2.0 with customized databases of both precursor and product ions containing heavy isotopes.
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Yu F, Fang H, Xiao K, Liu Y, Xue B, Tian Z. Mass measurement accuracy of the Orbitrap in intact proteome analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1391-1397. [PMID: 27197031 DOI: 10.1002/rcm.7574] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 03/09/2016] [Accepted: 03/20/2016] [Indexed: 06/05/2023]
Abstract
RATIONALE The mass measurement accuracy (MMA) of Orbitrap mass spectrometers is 1-5 ppm according to the manufacturer's specification; yet, up to 50 ppm has been used as mass tolerance to interpret Orbitrap data in the literature. A systematic evaluation of MMA is thus necessary to find the optimal mass tolerance to be used. METHODS Reversed-phase liquid chromatography/tandem mass spectrometry (RPLC/MS/MS) analyses of the intact E. coli proteome were carried out on a Q Exactive Orbitrap mass spectrometer coupled to a Dionex UltiMate 3000 RSLCnano system. The analysis included three technical replicates each day and was repeated for six continuous days right after a mass calibration. The obtained raw datasets were searched using ProteinGoggle 2.0 under four different mass tolerances of 5, 10, 15, and 20 ppm. RESULTS With both forward and random database searches and FDR ≤1% at the spectrum level, the most protein spectrum matches and protein IDs were obtained at a mass tolerance of 15 ppm. The average mass accuracy of both precursor and product ions from three representative high, medium, and low abundance proteins as well as the common proteins identified in all the 18 replicate runs was found to be 0-4 ppm; and no significant drift of measured mass accuracy was observed within the calibration period of 1 week. CONCLUSIONS Despite the mass measurement accuracy of 1-5 ppm of the Orbitrap stated by the manufacturer, the optimal mass tolerance for protein identification was found to be 15 ppm for both the precursor and product ions. Weekly mass calibration is appropriate because no significant drift in MMA was found within the 6-day period. Copyright © 2016 John Wiley & Sons, Ltd.
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Wang Z, Wang WH, Wang SL, Jin J, Song YW, Liu YP, Ren H, Fang H, Tang Y, Chen B, Qi SN, Lu NN, Li N, Tang Y, Liu XF, Yu ZH, Li YX. [Prognostic differences of phenotypes in pT1-2N0 invasive breast cancer: a large cohort study with cluster analysis]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2016; 38:440-447. [PMID: 27346402 DOI: 10.3760/cma.j.issn.0253-3766.2016.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To find phenotypic subgroups of patients with pT1-2N0 invasive breast cancer by means of cluster analysis and estimate the prognosis and clinicopathological features of these subgroups. METHODS From 1999 to 2013, 4979 patients with pT1-2N0 invasive breast cancer were recruited for hierarchical clustering analysis. Age (≤40, 41-70, 70+ years), size of primary tumor, pathological type, grade of differentiation, microvascular invasion, estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor 2 (HER-2) were chosen as distance metric between patients. Hierarchical cluster analysis was performed using Ward's method. Cophenetic correlation coefficient (CPCC) and Spearman correlation coefficient were used to validate clustering structures. RESULTS The CPCC was 0.603. The Spearman correlation coefficient was 0.617 (P<0.001), which indicated a good fit of hierarchy to the data. A twelve-cluster model seemed to best illustrate our patient cohort. Patients in cluster 5, 9 and 12 had best prognosis and were characterized by age >40 years, smaller primary tumor, lower histologic grade, positive ER and PR status, and mainly negative HER-2. Patients in the cluster 1 and 11 had the worst prognosis, The cluster 1 was characterized by a larger tumor, higher grade and negative ER and PR status, while the cluster 11 was characterized by positive microvascular invasion. Patients in other 7 clusters had a moderate prognosis, and patients in each cluster had distinctive clinicopathological features and recurrent patterns. CONCLUSIONS This study identified distinctive clinicopathologic phenotypes in a large cohort of patients with pT1-2N0 breast cancer through hierarchical clustering and revealed different prognosis. This integrative model may help physicians to make more personalized decisions regarding adjuvant therapy.
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Zhang HY, Jian WY, Fang H. [Analysis of substitutional effect of outpatient expenditure on inpatient expenditure in hypertensive patients with rural new cooperative medical scheme]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2016; 48:472-477. [PMID: 27318910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To study direct medical cost of hypertensive patients without complicated diseases, to analyze substitution impacts of outpatient expenditure on inpatient expenditure, and then to make recommendations to health policy makers and hypertensive patients for managing hypertension. METHODS The claims data of hypertensive patients insured by the rural new cooperative medical scheme in a city in northern China from 2008 to 2013 were analyzed, descriptive statistics employed to analyze direct medical cost of hypertensive patients and hypertensive patients without complicated diseases which was one of the three groups divided by medical treatment conditions (hypertension without complicated diseases, hypertension with complicated diseases, and other diseases), and the differences between groups compared by t test. The fixed effect two-part model was employed to analyze the substitution effect of outpatient services on inpatient services, and specific effects of outpatient times and reimbursement expenses on the inpatient expenditure were calculated by Logistic regression analysis. RESULTS For the hypertensive patients, the average cost of outpatients was 283.49 Yuan in 2008 and rose to 370.93 Yuan in 2013. After being divided into three groups, for hypertensive patients without complicated diseases, the average cost of outpatient was 449.79 Yuan in 2008 and rose to 582.53 Yuan in 2013. In the total cost of the outpatient, 45.73% was for the hypertensive patients without complicated diseases; in the total cost of the inpatient, only 9.29% was for the hypertensive patients without complicated diseases. By calculating the marginal effect of parameter estimation through the fixed effect two-part model, the inpatient cost could be significantly reduced by increasing the visit times of outpatient utilization or the cost of outpatient reimbursement. For example, in 2013, a 1% rise of outpatient visit times increased outpatient expenditures by 6.48 million Yuan, which could reduce inpatient expenditures by 39.86 million Yuan. The substituted ratio of outpatient cost on inpatient cost had been around 5 in 2010 and later. CONCLUSION The health policy-makers and hypertensive patients should pay more attentions to the substitution of outpatient cost for inpatient cost, especially for the hypertensive patients without complicated diseases whose direct medical cost was mainly due to outpatient rather than inpatient costs.
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Jin J, Jin J, Tang Y, Li S, Li N, Ren H, Zhang HZ, Zhou ZX, Liang JW, Zheng ZX, Zhao DB, Zhang HM, Zou SM, Fang H, Chi YHBL, Yang L, Wang WH, Song YW, Liu YP, Wang SL. The initial results for a phase III study of short-term radiotherapy plus chemotherapy vs long-term chemoradiotherapy in locally advanced rectal cancer (STELLAR trial). J Clin Oncol 2016. [DOI: 10.1200/jco.2016.34.15_suppl.e15000] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Shao S, Cao T, Jin L, Li B, Fang H, Wang G. 501 Increased lipocalin-2 contributes to the pathogenesis of psoriasis by modulating neutrophil chemotaxis and cytokine secretion. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zhang J, Fang H, Dang E, Li Q, Wang G. 058 Identification Th2 cell epitopes in NC16A domain on bullous pemphigoid. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fang Z, Xu Q, Wu JQ, Lu SJ, Wang YY, Fang H. A recombinant plasmid of composite cysteine proteinase inhibitor/glyceraldehyde-3-phosphate dehydrogenase gene of periodic Brugia malayi functions on DNA immunity in the host. Indian J Med Microbiol 2016; 34:146-52. [PMID: 27080764 DOI: 10.4103/0255-0857.180279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES Both cysteine proteinase inhibitors (CPIs) and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) play important roles in the pathogenesis of parasites and their relationship with the hosts. We constructed a new eukaryotic recombinant expression plasmid pcDNA3.1(+)-BmCPI/BmGAPDH of periodic Brugia malayi for investigation of the DNA vaccine-elicited immune responses. MATERIALS AND METHODS We cloned a gene encoding the CPIs and GAPDH from periodic B. malayi into vector pcDNA3.1. The composited plasmid or the control was injected into the tibialis anterior muscle of the hind leg in BALB/c mice, respectively. The target genes were detected by reverse transcription-polymerase chain reaction in muscle tissues. The stimulation index (SI) of T-lymphocyte proliferation and the levels of interferon-gamma (INF-g) and interleukin-4 ( IL-4) in serum were detected by thiazolyl blue tetrazolium blue and enzyme-linked immunosorbent assays. RESULTS The pcDNA3.1(+)-BmCPI/BmGAPDH was amplified from muscle tissues of the mice after immunisation. The SI of the immunised group was significantly higher than that of the two control groups (P < 0.05). The levels of INF-g and IL-4 of pcDNA3.1(+)-BmCPI/BmGAPDH group were both higher than those of the two control groups (P < 0.05). The level of INF-g of pcDNA3.1(+)-BmCPI/BmGAPDH group was significantly higher than that of pcDNA3.1(+)-BmCPI/CpG group (P < 0.05). CONCLUSIONS We conclude that the recombinant plasmid pcDNA3.1(+)-BmCPI/BmGAPDH could elicit specific humoural and cellular immune responses in mice.
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Xu J, Lu Q, Huang J, Hao F, Sun Q, Fang H, Gu J, Dong X, Zheng J, Luo D, Li F, Wang G, Gu H, Tian H, Yang H, Xi L, Li M, Zheng M, Wu Y, Tu Y, He Y, Zhao G, Sheng W, Li J, Hamedani A. A multicentre, randomized, single‐blind comparison of topical clindamycin 1%/benzoyl peroxide 5% once‐daily gel versus clindamycin 1% twice‐daily gel in the treatment of mild to moderate acne vulgaris in Chinese patients. J Eur Acad Dermatol Venereol 2016; 30:1176-82. [PMID: 27075705 DOI: 10.1111/jdv.13622] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 01/06/2016] [Indexed: 12/01/2022]
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Tang Y, Jin J, Ling N, Ren H, Wang WH, Song YW, Liu YP, Wang SL, Fang H, Li YX. 235TiP Phase III study of short-term radiotherapy followed by neoadjuvant chemotherapy versus preoperative long-term chemoradiotherapy in locally advanced rectal cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv523.96] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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171
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Fang H, Song YL, Li XS, Bi YM, Wang P, Fan HX, Meng LM, Hu HX. Right arm injection of contrast medium reduces venous artifacts in head and neck multislice spiral computed tomography angiography. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:4698-4702. [PMID: 26744859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE We tested whether injection of contrast medium via right or left arm would affect venous artifacts on head and neck multislice spiral computed tomography (CT) angiography. PATIENTS AND METHODS 326 patients were enrolled. Each patient was injected with 10 ml of contrast medium at 5 ml/sec. Time of peak contrast value plus an additional 1 sec was defined as delay time. Another 40 ml of contrast medium were injected with the same injection speed. The scanning area ranged from the aortic arch to the top of the head. Left and right forearms were used for intravenous injections of contrast medium in, respectively, 151 and 175 patients. Comparative analyses of image quality included determining contrast medium residues remaining in the superior vena cava, brachiocephalic vein, or subclavian vein, and comparisons of quality of three-dimensional CT angiography. RESULTS In 75% of head and neck angiographies, the delay time of the common carotid artery ranged from 16 to 22 sec. In 60% of the images, the quality was graded as excellent, with the left arm injection resulting in delay time of > 23 sec and the right arm delay time of > 18 sec. The CT imaging quality after contrast injections via left or right arms was statistically significant (p < 0.05). The image quality after right arm injection was better than after left arm injection. CONCLUSIONS Intravenous injection of contrast medium via right arm reduces artifacts from contrast medium residues and improves the image quality of head and neck CT angiography.
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Wang X, Tang Y, Jin J, Ren H, Fang H, Chen X, Li N, Zhang T, Wang W, Wang S, Liu Y, Song Y, Li Y. Interim Assessment of Phase II Study of Concurrent S-1 and Intensity Modulated Radiation Therapy as Adjuvant Treatment for Lymph Node-positive Gastric Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Wang J, Tian Y, Tang Y, Wang X, Li N, Ren H, Fang H, Feng Y, Jin J, Wang S, Song Y, Liu Y, Wang W, Li Y. A Phase II Study of Magnetic Resonance Imaging Guided Hematopoietical Bone Marrow Sparing Intensity Modulated Radiation Therapy With Concurrent Chemotherapy for Gastric Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ren H, Tang Y, Jin J, Li N, Fang H, Li Y, Song Y, Liu Y, Wang W, Wang S. Preoperative Chemoradiation With a Simultaneous Integrated Boost Compared to Regular Preoperative Chemoradiation for Locally Advanced Rectal Cancer: Interim Analysis of a Randomized Phase 2 Trial (NCT02195141). Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wang X, Tang Y, Jin J, Ren H, Fang H, Li N, Chen X, Zhang T, Song Y, Wang S, Wang W, Liu Y, Li Y. Intensity Modulated Radiation Therapy With S-1 Versus Capecitabine as Adjuvant Treatment for Locally Advanced Gastric Cancer. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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