Epson GT-X970 - Ζδ½γΌγ€γ Scanner, size: 5.6 MB
Here you can find all about Epson GT-X970 like manual and other informations. For example: review.
Epson GT-X970 manual (user guide) is ready to download for free.
On the bottom of page users can write a review. If you own a Epson GT-X970 please write about it to help other people.
[ Report abuse or wrong photo | Share your Epson GT-X970 photo ]
User reviews and opinions
No opinions have been provided. Be the first and add a new opinion/review.
Accuracy study QA strategy for VMAT at Juntendo University Hospital, Tokyo, Japan
Juntendo University, Tokyo, Japan, To evaluate the new rotational IMRT delivery technique from Elekta, which is called volumetric modulated arc therapy (VMAT), in terms of treatment planning procedure and QA of planned dose distribution, we report the patient specific QA for prostate treatment at Juntendo University Hospital. First published as a poster at ESTRO 2009
QA Strategy for VMAT at Juntendo University Hospital, Tokyo, Japan
Shuichi Ozawa1, Motohiro Kawashima1, Tomohisa Furuya1, Yutaka Tsutsumi1, Akira Isobe1, Takayuki Fujita1, Chie Kurokawa1, Satoru Sugimoto1, 2, Chie Toramatsu1, 3, Kana Itoh1, Kumiko Karasawa1
Juntendo University, Tokyo, Japan, University of Florida, Gainesville, FL, USA University of Florida Proton Therapy Institute, Jacksonville, FL, USA
Materials and methods
The CT image sets are transferred to RTPS (Philips Pinnacle3), as shown in figure 1. After target and OAR delineation, these images are exported to another RTPS (ERGO++) to optimize the VMAT plan. Although ERGO++ converts the 73 fixed beams (each five degrees, single arc delivery) to VMAT sequences, planar dose calculation for a phantom delivery is calculated by Pinnacle3 with data from the 73 fixed beams imported from ERGO++.
Figure 1: flowchart of VMAT procedure no one needs to have new skills except the physicists.
A tough water phantom (Kyoto Kagaku) 40 x 40 x 20cm in size was used for the phantom irradiation (figure 2a). The absolute dose to the center of the phantom was measured by a Farmer chamber. The planar dose distribution was measured by Gafchromic EBT or EBT2 films. Films(1) were placed in several coronal planes of the phantom, for example, source-to-film distances (SFDs) of 98, 100, and 102cm. Planar dose calculations were performed at 3 mm depths of each SFD with 1mm intervals. Thus, each film data point had seven calculation results to be compared. Comparison of the planar dose measurement with multiple depth calculations enables us to consider the 2.5 dimensional DTA(2). The exposed films were scanned by an Epson scanner (GT-X970; figure 2b).
Figure 2a: QA set-up
Figure 2b: EPSON GTX970 scanner (A4 size).
The films were analyzed using the MapCHECK software (Sun Nuclear Corporation(3)), which uses the red channel for film analysis. Figure 3 shows a screen shot of film analysis by MapCHECK.
Figure 3: film analysis. 3%/3mm gamma analysis with relative dose comparison normalization point is CAX. (screen shot of MapCHECK software).
Table 1: VMAT QA report at Juntendo University Hospital.
Document No. 0843 10:Elekta. All mentioned trademarks and registered trademarks are the property of the Elekta Group. All rights reserved. No part of this document may be reproduced in any form without written permission from the copyright holder. Specifications subject to change without notice.
1 http://www.gafchromic.com/ 2 WILKO F.A.R. VERBAKEL , et al, Int. J. Radia Oncol Biol Phys, Vol. 74, No. 1, pp. 252 259, http://www.sunnuclear.com/
The difference in the absolute dose to the isocenter was around 1%. When the measured planar dose distribution has at least one calculated planar dose that has a pass rate of more than 90% with a 3%/3mm criterion, the measurement was determined as passed. The film dosimetry in the phantom agreed well with the plans, and all film results have passed so far.
The entire patient-specific QA for VMAT showed very satisfactory results. We found that film analysis with multiple planar dose calculation was a useful method for VMAT QA.
Corporate Head Office: Elekta AB (publ) Box 7593, SE-Stockholm, Sweden Tel +00 Fax +00 firstname.lastname@example.org Regional Sales, Marketing and Service: North America Atlanta, USA Tel +Fax +email@example.com Europe, Latin America, Africa, Middle East & India Tel +Fax +firstname.lastname@example.org
Human Care Makes the Future Possible
Asia Pacific Hong Kong, China Tel +2208 Fax +7133 email@example.com
Abstract ID: 15725 Title: Evaluation of Radiation Dosimetry of Bolus Electron Conformal Therapy (ECT)
Purpose:To evaluate the radiation dosimetry of bolus electron conformal therapy (ECT) using new commercially available bolus fabrication software. Methods: A customized electron bolus was designed using 3D planning system (TPS) Eclipse Ver.8.6.15 (Varian) and p.d ECT (.decimal) software. Computed tomography (CT) images of tough water was obtained and the planning target volume (PTV) was assumed. The proximal surface of the bolus was designed to conform to the 90% isodose line to the distal surface of the PTV using p.d ECT. Dose was calculated with a pencil beam algorithm for review with TPS. Based on structure set from TPS, bolus was fabricated using a computer-controlled milling machine. To evaluate the dose distribution, CT images with the bolus on the tough water were acquired and final dose distribution was computed. Gafchromic EBT 2 film (Lot A09171002, ISP) were sandwiched between tough water at 1, 2 and 3 cm depth from the bottom of bolus and irradiated at same geometry with planning. Film was scanned by EPSON GTX970 scanner and that 2D dose distribution is compared with calculation. Results: 2D dose distribution showed qualitative agreement between calculation and measurement, absolute dose value is corresponded within 3% in the region of PTV. The pass rates of the gamma test were greater than 90% at 3 cm depth. Conclusions: In this study the dose distribution for bolus ECT was measured by EBT 2 film. The 3D electron bolus which is fabricated by p.d ECT software reproduce the accurate dose distribution that is calculated with TPS.
YH-J70 Refrigerator 23 HD700X Orbit Cricket 2005 Designjet 400 Omnipcx 4400 FC6843 02 EH-TW450 DA-302 42PX4DV P193W Gz-mc200 Firepod TVM125-220 CS-XE9CKE EX-P700 UE-40C6800US Printer 2480 CDX-GT39U 96910 EB 210 R1801 OM-2N DP-508 SHR-5162P RV-9950 TS320GSJ25P MP-FUB30 KDL-32S3010 15LB450S DAV-HDX275 VGN-SZ5xn-C ML-1665 R-290H SD-616E ICN 630 CNP-VTW1 Onetouch 4 Quad 110 TX-21MK1P RX101 Contribute 3 GV-D300 VS-45609 Aqgmd 149 STR-DE185 Station 42PG30 FT-7800E Vision KDL-40W5500 120XLT LBP2900 Samsung B300 3 3 KAC-9102D UX-F14CL AW1000N 20F512T Samsung W629 VGN-FW31J Afipr VBT185Z SC-AK630 Roland TU-2 KDC-V7017 L1717S-SN ECR 6920 Photostitch WF-T6517TC SS-B3000 HS 820 LG UW92 L1910B XS-L1220 SCS500 5 X-950T PCG-GRS700 Vectra LE20S81BX Review Servers Logicom L550 Programchart TL-ANT2414A TX-28PB50 Versatis MAX AVF 109 Netbook PRO SA-VA15 Nokia 2280 KDL-46EX400 19PFL5403D DVR 522 RP5011 SF3000 TX-SR500E LG 6190 Light X-930
manuel d'instructions, Guide de l'utilisateur | Manual de instrucciones, Instrucciones de uso | Bedienungsanleitung, Bedienungsanleitung | Manual de Instruções, guia do usuário | инструкция | návod na použitie, Užívateľská príručka, návod k použití | bruksanvisningen | instrukcja, podręcznik użytkownika | kullanım kılavuzu, Kullanım | kézikönyv, használati útmutató | manuale di istruzioni, istruzioni d'uso | handleiding, gebruikershandleiding
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101