Development of a high-precision<i>xyz</i>-measuring table for the determination of the 3D dose rate distributions of brachytherapy sources

Eichmann, Marion; Krause, Thomas; Flühs, Dirk; Spaan, B.

doi:10.1088/0031-9155/57/22/n421

Cited by 11 publications

(18 citation statements)

References 14 publications

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“…11 (22) Owing tosmall values of θ x and θ y , it can be deduced thatsinθ x (θ y )≈θ x (θ y ), cosθ x (θ y )≈1.…”

Section: Kinematic Model Of the 3-dof Out-of-plane Systemmentioning

confidence: 99%

“…[21] a three translational DOF complaint perpendicular parallel micro-manipulator with monolithic structure was proposed. Eichmann et al [22] designed a high-precision xyz-measuring table for the determination of the 3D dose rate distributions of brachytherapy sources.…”

Section: Introductionmentioning

confidence: 99%

“…From the above literature review, it can be seen that most of the existing precision positioning systems are featured by oneto three-DOF motions [10][11][12][13][14][15][16][17][18][19][20][21][22], which cannot meet the needs of manipulations in some cases. For example, an atomic force microscope designed for nanometrology in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Design and control of a 6-degree-of-freedom precision positioning system

Cai

Tian

Wang

et al. 2017

Robotics and Computer-Integrated Manufacturing

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(2017) Design and control of a 6-degree-of-freedom precision positioning system. Robotics and Computer-Integrated Manufacturing, 44 . pp. 77-96. Permanent WRAP URL:http://wrap.warwick.ac.uk/81428 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription.For more information, please contact the WRAP Team at: wrap@warwick.ac.uk Design and Control of a6-degree-of-freedom Precision Positioning

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“…11 (22) Owing tosmall values of θ x and θ y , it can be deduced thatsinθ x (θ y )≈θ x (θ y ), cosθ x (θ y )≈1.…”

Section: Kinematic Model Of the 3-dof Out-of-plane Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and control of a 6-degree-of-freedom precision positioning system

Cai

Tian

Wang

et al. 2017

Robotics and Computer-Integrated Manufacturing

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“…3 stone is revealed. Increase in the number of low basis hydrosilicates of calcium and increased gel and less capillary sponginess especially at the submicroscopic level determine the growth of the strength and reduction of the concrete permeability [11,12].…”

Section: A) B)mentioning

confidence: 99%

Composite binders for concrete with reduced permeability

Fediuk

Yushin

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Composite binder consisting of cement (55%), acid fly ash (40%) and limestone (5%) has been designed. It is obtained by co-milling to a specific surface of 550 kg/m², it has an activity of 77.3 MPa and can produce a more dense cement stone structure. Integrated study revealed that the concrete on the composite binder basis provides an effective diffusion coefficient D. So we can conclude that the concrete layer protects buildings from toxic effects of expanded polystyrene. Low water absorption of the material (2.5% by weight) is due to the structure of its cement stone pore space. Besides lime powder prevents the penetration of moisture, reduces water saturation of the coverage that has a positive effect on useful life period. It also explains rather low water vapor permeability of the material -0.021 mg/(mhour-Pa).

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“…Plastic scintillators fulfil such requirements and have, therefore, been used in a wide range of electron and photon radiation dosimetries for decades, with different measuring geometries [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]. Furthermore, they allow for a direct reading of the signal proportional to the dose rate over four orders of magnitude and can be used as scanning detectors in a 3-dimensional water phantom [6,19,20,21]. Unlike dosimetric measurements with radiochromic films or thermoluminescent dosimeters, the complete dose distribution of an ophthalmic plaque can be measured with a scintillation dosimeter within a single measuring procedure, i.e.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Naphthalate Scintillator: A Novel Detector for the Dosimetry of Radioactive Ophthalmic Applicators

Flühs¹,

Flühs²,

Ebenau³

et al. 2015

Ocul Oncol Pathol

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Background: Dosimetric measurements in small radiation fields with large gradients, such as eye plaque dosimetry with β or low-energy photon emitters, require dosimetrically almost water-equivalent detectors with volumes of <1 mm³ and linear responses over several orders of magnitude. Polyvinyltoluene-based scintillators fulfil these conditions. Hence, they are a standard for such applications. However, they show disadvantages with regard to certain material properties and their dosimetric behaviour towards low-energy photons. Purpose, Materials and Methods: Polyethylene naphthalate, recently recognized as a scintillator, offers chemical, physical and basic dosimetric properties superior to polyvinyltoluene. Its general applicability as a clinical dosimeter, however, has not been shown yet. To prove this applicability, extensive measurements at several clinical photon and electron radiation sources, ranging from ophthalmic plaques to a linear accelerator, were performed. Results: For all radiation qualities under investigation, covering a wide range of dose rates, a linearity of the detector response to the dose was shown. Conclusion: Polyethylene naphthalate proved to be a suitable detector material for the dosimetry of ophthalmic plaques, including low-energy photon emitters and other small radiation fields. Due to superior properties, it has the potential to replace polyvinyltoluene as the standard scintillator for such applications.

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Development of a high-precisionxyz-measuring table for the determination of the 3D dose rate distributions of brachytherapy sources

Cited by 11 publications

References 14 publications

Design and control of a 6-degree-of-freedom precision positioning system

Design and control of a 6-degree-of-freedom precision positioning system

Composite binders for concrete with reduced permeability

Polyethylene Naphthalate Scintillator: A Novel Detector for the Dosimetry of Radioactive Ophthalmic Applicators

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