3D-printed surface mould applicator for high-dose-rate brachytherapy

Mark Schumacher; Andras Lasso; Ian Cumming; Adam Rankin; Conrad B. Falkson; L. John Schreiner; Chandra Joshi; Gabor Fichtinger

doi:10.1117/12.2082543

3D-printed surface mould applicator for high-dose-rate brachytherapy

Mark Schumacher, Andras Lasso, Ian Cumming, Adam Rankin, Conrad B. Falkson, L. John Schreiner, Chandra Joshi, Gabor Fichtinger

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

PURPOSE: In contemporary high-dose-rate brachytherapy treatment of superficial tumors, catheters are placed in a wax mould. The creation of current wax models is a difficult and time consuming proces.The irradiation plan can only be computed post-construction and requires a second CT scan. In case no satisfactory dose plan can be created, the mould is discarded and the process is repeated. The objective of this work was to develop an automated method to replace suboptimal wax moulding. METHODS: We developed a method to design and manufacture moulds that guarantee to yield satisfactory dosimetry. A 3D-printed mould with channels for the catheters designed from the patient's CT and mounted on a patient-specific thermoplastic mesh mask. The mould planner was implemented as an open-source module in the 3D Slicer platform. RESULTS: Series of test moulds were created to accommodate standard brachytherapy catheters of 1.70mm diameter. A calibration object was used to conclude that tunnels with a diameter of 2.25mm, minimum 12mm radius of curvature, and 1.0mm open channel gave the best fit for this printer/catheter combination. Moulds were created from the CT scan of thermoplastic mesh masks of actual patients. The patient-specific moulds have been visually verified to fit on the thermoplastic meshes. CONCLUSION: The masks were visually shown to fit onto the thermoplastic meshes, next the resulting dosimetry will have to be compared with treatment plans and dosimetry achieved with conventional wax moulds in order to validate our 3D printed moulds.

Original language	English (US)
Title of host publication	Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling
Publisher	SPIE
Volume	9415
ISBN (Print)	9781628415056
DOIs	https://doi.org/10.1117/12.2082543
State	Published - 2015
Externally published	Yes
Event	Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling - Orlando, United States Duration: Feb 22 2015 → Feb 24 2015

Other

Other	Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling
Country/Territory	United States
City	Orlando
Period	2/22/15 → 2/24/15

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Biomaterials
Radiology Nuclear Medicine and imaging

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10.1117/12.2082543

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Schumacher, M, Lasso, A, Cumming, I, Rankin, A, Falkson, CB, Schreiner, LJ, Joshi, C & Fichtinger, G 2015, 3D-printed surface mould applicator for high-dose-rate brachytherapy. in Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling. vol. 9415, 94152E, SPIE, Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling, Orlando, United States, 2/22/15. https://doi.org/10.1117/12.2082543

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title = "3D-printed surface mould applicator for high-dose-rate brachytherapy",

abstract = "PURPOSE: In contemporary high-dose-rate brachytherapy treatment of superficial tumors, catheters are placed in a wax mould. The creation of current wax models is a difficult and time consuming proces.The irradiation plan can only be computed post-construction and requires a second CT scan. In case no satisfactory dose plan can be created, the mould is discarded and the process is repeated. The objective of this work was to develop an automated method to replace suboptimal wax moulding. METHODS: We developed a method to design and manufacture moulds that guarantee to yield satisfactory dosimetry. A 3D-printed mould with channels for the catheters designed from the patient's CT and mounted on a patient-specific thermoplastic mesh mask. The mould planner was implemented as an open-source module in the 3D Slicer platform. RESULTS: Series of test moulds were created to accommodate standard brachytherapy catheters of 1.70mm diameter. A calibration object was used to conclude that tunnels with a diameter of 2.25mm, minimum 12mm radius of curvature, and 1.0mm open channel gave the best fit for this printer/catheter combination. Moulds were created from the CT scan of thermoplastic mesh masks of actual patients. The patient-specific moulds have been visually verified to fit on the thermoplastic meshes. CONCLUSION: The masks were visually shown to fit onto the thermoplastic meshes, next the resulting dosimetry will have to be compared with treatment plans and dosimetry achieved with conventional wax moulds in order to validate our 3D printed moulds.",

author = "Mark Schumacher and Andras Lasso and Ian Cumming and Adam Rankin and Falkson, {Conrad B.} and Schreiner, {L. John} and Chandra Joshi and Gabor Fichtinger",

year = "2015",

doi = "10.1117/12.2082543",

language = "English (US)",

isbn = "9781628415056",

volume = "9415",

booktitle = "Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling",

publisher = "SPIE",

note = "Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling ; Conference date: 22-02-2015 Through 24-02-2015",

}

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T1 - 3D-printed surface mould applicator for high-dose-rate brachytherapy

AU - Schumacher, Mark

AU - Lasso, Andras

AU - Cumming, Ian

AU - Rankin, Adam

AU - Falkson, Conrad B.

AU - Schreiner, L. John

AU - Joshi, Chandra

AU - Fichtinger, Gabor

PY - 2015

Y1 - 2015

N2 - PURPOSE: In contemporary high-dose-rate brachytherapy treatment of superficial tumors, catheters are placed in a wax mould. The creation of current wax models is a difficult and time consuming proces.The irradiation plan can only be computed post-construction and requires a second CT scan. In case no satisfactory dose plan can be created, the mould is discarded and the process is repeated. The objective of this work was to develop an automated method to replace suboptimal wax moulding. METHODS: We developed a method to design and manufacture moulds that guarantee to yield satisfactory dosimetry. A 3D-printed mould with channels for the catheters designed from the patient's CT and mounted on a patient-specific thermoplastic mesh mask. The mould planner was implemented as an open-source module in the 3D Slicer platform. RESULTS: Series of test moulds were created to accommodate standard brachytherapy catheters of 1.70mm diameter. A calibration object was used to conclude that tunnels with a diameter of 2.25mm, minimum 12mm radius of curvature, and 1.0mm open channel gave the best fit for this printer/catheter combination. Moulds were created from the CT scan of thermoplastic mesh masks of actual patients. The patient-specific moulds have been visually verified to fit on the thermoplastic meshes. CONCLUSION: The masks were visually shown to fit onto the thermoplastic meshes, next the resulting dosimetry will have to be compared with treatment plans and dosimetry achieved with conventional wax moulds in order to validate our 3D printed moulds.

AB - PURPOSE: In contemporary high-dose-rate brachytherapy treatment of superficial tumors, catheters are placed in a wax mould. The creation of current wax models is a difficult and time consuming proces.The irradiation plan can only be computed post-construction and requires a second CT scan. In case no satisfactory dose plan can be created, the mould is discarded and the process is repeated. The objective of this work was to develop an automated method to replace suboptimal wax moulding. METHODS: We developed a method to design and manufacture moulds that guarantee to yield satisfactory dosimetry. A 3D-printed mould with channels for the catheters designed from the patient's CT and mounted on a patient-specific thermoplastic mesh mask. The mould planner was implemented as an open-source module in the 3D Slicer platform. RESULTS: Series of test moulds were created to accommodate standard brachytherapy catheters of 1.70mm diameter. A calibration object was used to conclude that tunnels with a diameter of 2.25mm, minimum 12mm radius of curvature, and 1.0mm open channel gave the best fit for this printer/catheter combination. Moulds were created from the CT scan of thermoplastic mesh masks of actual patients. The patient-specific moulds have been visually verified to fit on the thermoplastic meshes. CONCLUSION: The masks were visually shown to fit onto the thermoplastic meshes, next the resulting dosimetry will have to be compared with treatment plans and dosimetry achieved with conventional wax moulds in order to validate our 3D printed moulds.

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SN - 9781628415056

VL - 9415

BT - Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling

PB - SPIE

T2 - Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling

Y2 - 22 February 2015 through 24 February 2015

ER -

3D-printed surface mould applicator for high-dose-rate brachytherapy

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