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| 1 | A prospective trial of volumetric intensity-modulated arc therapy vs conventional intensity modulated radiation therapy in advanced head and neck cancer显示文摘AIM: To prospectively compare volumetric intensitymodulated arc therapy(VMAT) and conventional intensity-modulated radiation therapy(IMRT) in coverage of planning target volumes and avoidance of multiple organs at risk(OARs) in patients undergoing definitive chemoradiotherapy for advanced(stage Ⅲ or Ⅳ)squamous cell cancer of the head and neck. METHODS: Computed tomography scans of 20 patients with advanced tumors of the larynx, naso-, oroand hypopharynx were prospectively planned using IMRT(7 field) and VMAT using two arcs. Calculated doses to planning target volume(PTV) and OAR were compared between IMRT and VMAT plans. Dose-volume histograms(DVH) were utilized to obtain calculated doses to PTV and OAR, including parotids, cochlea,spinal cord, brainstem, anterior tongue, pituitary and brachial plexus. DVH's for all structures were compared between IMRT and VMAT plans. In addition the planswere compared for dose conformity and homogeneity. The final treatment plan was chosen by the treating radiation oncologist. RESULTS: VMAT was chosen as the ultimate plan in 18 of 20 patients(90%) because the plans were thought to be otherwise clinically equivalent. The IMRT plan was chosen in 2 of 20 patients because the VMAT plan produced concentric irradiation of the cord which was not overcome even with an avoidance structure. For all patients, VMAT plans had a lower number of average monitor units on average(MU = 542.85) than IMRT plans(MU = 1612.58)(P < 0.001). Using the conformity index(CI), defined as the 95% isodose volume divided by the PTV, the IMRT plan was more conformal with a lower conformity index(CI = 1.61) than the VMAT plan(CI = 2.00)(P = 0.003). Dose homogeneity, as measured by average standard deviation of dose distribution over the PTV, was not different with VMAT(1.45 Gy) or IMRT(1.73 Gy)(P = 0.069). There were no differences in sparing organs at risk.CONCLUSION: In this prospective study, VMAT plans were chosen over IMRT 90% of the time. Compared to IMRT, VMAT plans used only one third of the MUs, had shorter treatment times, and similar sparing of OAR. Overall, VMAT provided similar dose homogeneity but less conformity in PTV irradiation compared to IMRT. This difference in conformity was not clinically significant. | Simon D Fung-Kee-Fung Rachel Hackett Lee Hales Graham Warren Anurag K Singh | 2012 | World Journal of Clinical Oncology2012，3，4： | 2 |
| 2 | A Process Analysis of Global Trade Management:An Inductive Approach显示文摘 | Hausman Warren H Lee Hau L Napier Graham R F | | 0，，02： | 1 |
| 3 | Spatially Resolved Nanomechanical Properties of Kevlar Fibers显示文摘 | Graham J F McCague C Warren O L | | 0，，： | 1 |
| 4 | The pattern and outcome of acute severe colitis显示文摘 | Lotte C. Dinesen Alissa J. Walsh Marijana Nedeljkovic Protic Graham Heap Fraser Cummings Bryan F. Warren Bruce George Neil J.M. Mortensen Simon P.L. Travis | 2010 | Journal of Crohn’s and Colitis2010，，： | 1 |
| 5 | In Vivo Magnetic Resonance Imaging of Coronary Thrombosis Using a Fibrin-Binding Molecular Magnetic Resonance Contrast Agent显示文摘 | René M. Botnar Arno Buecker Andrea J. Wiethoff Edward C. Parsons Marcus Katoh George Katsimaglis Robert M. Weisskoff Randall B. Lauffer Philip B. Graham Rolf W. Gunther Warren J. Manning Elmar Spuentrup | 2004 | Circulation2004，，11： | 1 |
| 6 | Spatially Re -solved Nanomechanical Properties of Kevlar Fibers 显示文摘 | Graham J F MeCagueC Warren OL etal | 2000 | P~lym~ Communications2000，41，12： | 1 |
| 7 | A Double-blind, Ran- domized, Placebo-Controlled Trial of Fluoxetine in Children and Adolescents With Depression 显示文摘 | Graham JE John Rush Warren AW | 1997 | Arch Gen Psychiatry1997，54，11： | 1 |
| 8 | In Vivo Molecular Imaging of Acute and Subacute Thrombosis Using a Fibrin-Binding Magnetic Resonance Imaging Contrast Agent显示文摘 | René M. Botnar Alexandra S. Perez Sonia Witte Andrea J. Wiethoff James Laredo James Hamilton William Quist Edward C. Parsons Anand Vaidya Andrew Kolodziej John A. Barrett Philip B. Graham Robert M. Weisskoff Warren J. Manning Michael T. Johnstone | 2004 | Circulation: Journal of the American Heart Association2004，，16： | 1 |
| 9 | spatially resolved nanomechanical properties of Kevlar fibers 显示文摘 | Graham J F Mc Cague C Warren O L | 2000 | Polymer2000，41，12： | 1 |
| 10 | Spatially resolved nanomechanical properties of Kevlar fibers显示文摘 | Graham J P McCague C Warren O L | 2000 | Polymer2000，41，： | 1 |
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