Octavius 729 measure the dose with ptw octavius systems and verify it against the treatment planning system tps quickly and efficiently using verisoft patient plan verification software. An instruction manual in english is included with every detector. For each measurement interval the 3d dose is reconstructed through the use of a simple set of depth dose pdd curves. Turnkey solutions for radiation calibration laboratories lab equipment,irradiator,dosimetry, turnkey laboratories, services, design, implementation. For vmat plans, it measures planar dose distributions as a function of gantry angle in order to compute the resulting 3d dose distribution. Briefly, the 2darray 1500 consists of 1405 vented ionization chambers, each having an entrance area of 4. Octavius 4d modular systems for 4d patient and machine qa. Ptw octavius 4d system at cho ray hospital youtube. May, 2019 schematic diagram of the measurement configurations used in this study to reconstruct 3d dose distributions within the octavius 4d phantom geometry. Independent verification and documentation of dose delivery. Especially for radiotherapy departments implementing srssbrt delivery techniques into their clinical practice, octavius 1600 srs can support and. Four dqa plans for each patient plan were created using the tomotherapy dqa station hiart version 4. True 3d inside the entire volume rotating the detector synchronously with the gantry, octavius 4d measures the dose in the entire phantom volume, includ. Octavius 4d can be used with various detector arrays depending on your application or budget.
Validation and clinical implementation of commercial. The octavius 4d system acquires and stores the 2d array measurements as a function of time and gantry angle in intervals. Diamond scs dose calculations were performed with heterogeneity corrections for 124 vmat plans with isocentre at a region above. In case of motorized movements, the system is controlled by software from the control room. The unique rotating phantom offers a perfect isotrop. Application of octavius 4d at varian halcyon ptw dosimetry. Its main characteristic is that it furnishes a time. Despite the recent advanced developments in radiation therapy planning, treatment planning for headneck and pelvic cancers remains challenging due to large concave target volumes, multiple dose prescriptions and numerous organs at risk close to targets.
Integrated dose reconstruction algorithms support octavius 4d for verification of standard and nonstandard clinical parameters such as noncoplanar beams, large fields, extremely offaxis lying target volumes or treatments with multiple energies etc. Ptw freiburgs premises, which in the very beginning was located in professor hammers garden shed, covers a total area of 20. The total dose in the octavius 4d cylindrical phantom is then. Fx3u series user s manual hardware edition 3 remove the special adapter connector cover on the expansion board fig. Templatebased automation of treatment planning in advanced. Three dimensional dose verification of vmat plans using the. The company, which scores steady growth, is the recognized market leader in dosimetry today. User s manual hardware edition jy997d31 model code. Ptw octavius 4dla soluzione piu accurata ed efficiente per le verifiche pretrattamento imrt igrt imat vmat rapidarculteriori informazioni sono dispo. Pdf evaluation of 3d gamma index calculation implemented. Its innovative modular design, coupled with the best detector technology on the market, makes octavius 4d an ideal system for routine patient and machine.
The ptw octavius 4d system provides 4d patient plan verification based on true independent measurements. Vmat pretreatment verification using octavius 4d system. Octavius 4d can be used with various detector arrays depend ing on your. Ptw offers a special 2d array to verify such small fields, but we wanted to give it a try with our system. We built in user friendliness from the very start, with a single software for all applications. Featurerich and easytouse, verisoft provides you with a wide range of dose evaluation tools from basic visual com. Pdf evaluation of dosimetry check software for imrt patient. The gamma index calculated by the two systems was compared with manual calculated for one data set.
Octavius 4d system ptw consists of an ion chamber array embedded in a cylindrical phantom which, assisted by an inclinometer, rotates synchronously with the gantry. Budgetfriendly solution for users of ptw twodimensional. Pdf evaluation of 3d gamma index calculation implemented in. Personalized automation of treatment planning in headneck. Octavius 4d is the only 4d dosimetry system that verifies the srs dose based on truly independent measurements. The octavius 1500 2d ion chamber array and its associated phantoms. Octavius 4d is the only truly modular 4d qa system.
Verisoft supports the control of all available ptw octavius solutions necessary to verify imrt, vmat or srssbrt treatment plans. The cable length of the detectors is 1 m, if not stated otherwise. Additionally, the merge capability of the verisoft software, which can increase spatial resolution, is a useful tool for more complex vmat plans. Octavius 4d modular systems for 4d patient and machine qa ruby.
Ptw headquarters ptw freiburg lorracher strasse 7 79115 freiburg. Additionally, the merge capability of the verisoft software, which can increase spatial resolution, is. With a diameter of 21 cm the resulting homogeneous cylinder geometry adapts the anatomy of a human head perfectly in srs treatments of the brain. Enhance or simply upgrade to the nextgeneration ptw detector as and when needed. Ptw employs a staff of more than 230 all over the world. Dosimetric characteristics of the novel 2d ionization chamber. The medical device control unit octavius 4d is realized by ptw freiburg. We can highly recommend the use of the optional trolley t40057. Department of energys office of scientific and technical information. Sep 01, 2016 ptw s octavius 4d phantom with 729 ion chamber detector array measurements agreed well with eclipse tps calculated dose showing an average deviation of. In mephysto tablegenerator, curves were manipulated according to the octavius 4d manual normalize to individual maximum, extrapolate for field size 0 x 0 cm, interpolate for all missing field sizes, normalize again. Dosimetric characteristics of the novel 2d ionization. The inclinometer now automatically tries to establish a bluetooth connection to the receiver.
Papers with the keyword octavius page 4 read by qxmd. Material and methods the ptw octavius detector srs ia 2. This allows matching the measurement setup according to the particular clinical situation and extends the scope of octavius 4d significantly. Its innovative modular design, coupled with the best detector technology on the market, makes octavius 4d an ideal system for routine patient and machine qa. The couch is lowered to about 50 cm below isocenter, then the trolley is moved over the couchtop from the side. The octavius 4d dosimetric system generates a 3d dose matrix based on a measured planar dose and user supplied percentage depth dose pdd data. Fx3gc series user s manual hardware edition jy997d45401 model code.
Three dimensional dose verification of vmat plans using. The octavius 4d is a true independent 4d dose verification. Due to the weight of the rotation unit nearly 30 kg with standard top installed, it is very impractical to carry the phantom around. This allows matching the measurement setup according to the particular clinical situation and extends the scope of octavius 4d. Octavius phantom the 2darray together with octavius. As the receiver the octavius control unit isnt switched on at that time the. The 1500 2darray consists of a matrix of 1405 ion chambers with a size of 4. Gamma evaluation with octavius 4d phantom for pre treatment. This note describes implementation of octavius 4d with oncentra masterplan. The octavius1500 2d ion chamber array and its associated. Radiation medicine qa solutions edition nov 2019 ptw. Octavius 4d and the standard top were used for the verification of 46 clinical. Plan verification system octavius 4d ptw omnia health. Eight clinical patient plans were chosen to represent a range of treatment sites and typical clinical plans.
Due to the tiny field size, two measurements were performed, and merged. The accuracy of 3d dose matrices reconstructed by the octavius 4d dosimetric system was systematically studied for an open static field, an open arc field and clinical vmat plans. Dosimetric properties and the applicability in modern dosimetry were investigated. The software is tailored to ptw products, but an xml interface enables to import measurement results from other devices as well. In this study, we investigated the correlation between 2dimensional 2d and 3d gamma analysis using the new ptw octavius 4d system for various parameters. For ptw octavius 4d 729 and ptw octavius 4d 1500 arrays the spatial. By shifting the od1500 in the longitudinal direction by 5 mm and repeating the measurement, the coverage can be doubled, and spatial resolution improved. The epiqa results for the cwand ccwarc and 2g2 were already sufficient, should the octavius 4d result fail. Feb 01, 2021 dose distributions were measured utilizing the 1500 2d ionchamber array together with the octavius 4d phantom both developed by ptw ptw, freiburg, germany. The workflow for data export might be a little bit different for other tps. Contents 3 contents introducing ptw 4 radiation therapy 9 absolute dosimetry 11 patient and brachytherapy dosimetry 27 therapy beam analysis 33 quality control 43 diagnostic imaging 61 absolute dosimetry 63 quality control 71 patient dosimetry 81 radiation monitoring 89 metrology 97 quick view 117 tba therapy beam analyzers 118 guide to ptw dosemeters 120 guide to ptw. It supports a variety of ptw detector arrays and phantom tops for efficient patient and machinespecific quality assurance.
For 3g3, the verisoft results seem to be quite good. Technical note application of octavius 4d at varian halcyontm. Three detectors ptw octavius 4d 729, 1500 and 100 srs used in five configurations with different. For this study, we selected 150 clinically approved volumetricmodulated arc therapy vmat plans of head and neck 50, thoracic esophagus 50, and pelvic cervix 50 sites.
Either a semiflex 310 or 31010 ionization chamber ptw. The results showed that octavius 4d phantom, with 2darray seven29, can be an adequate verification system both for simple and more complex cases. Pdf evaluation of dosimetry check software for imrt. Ptw freiburgs production area, which in the very beginning was located in professor hammers garden shed, covers a total area of 7000 m 2 today. When connecting this product to another special adapter, please replace the expansion board in the above description with a special adapter and perform the. This technique is used when two octavius 4d measurements are merged. Octavius 4d characterization for flattened and flattening. Freiburg, germany, being the conceptual successor of the la48 linear array1, has been introduced recently. It does not need a connection to the linac or tps, but uses ion chamber measurements and pdd curves as a basis for 3d dose calculation. The ptw ruby phantom is designed as a modular phantom with the. For measurements with octavius 4d the octavius detector 1600 srs can be used with the octavius top srs plus. Octavius 4d how to start omp procedure for the implementation and routine use of imrt patient plan verification foreword.
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