Collision indicator charts for gantry-couch position combinations for Siemens ONCOR and Elekta Infinity linacs

Stewart J Becker; Wes Culberson; Ryan Flynn

doi:10.1120/jacmp.v14i5.4355

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Collision indicator charts for gantry-couch position combinations for Siemens ONCOR and Elekta Infinity linacs

Journal article

Open access

Peer reviewed

Collision indicator charts for gantry-couch position combinations for Siemens ONCOR and Elekta Infinity linacs

Stewart J Becker, Wes Culberson and Ryan Flynn

Journal of applied clinical medical physics, Vol.14(5), pp.278-283

09/06/2013

DOI: 10.1120/jacmp.v14i5.4355

PMCID: PMC5714576

PMID: 24036873

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https://doi.org/10.1120/jacmp.v14i5.4355View

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Abstract

Noncoplanar radiation fields from a linear accelerator can be used to deliver radiation dose distributions that are superior to those delivered using coplanar radiation fields. Noncoplanar radiation field arrangements are especially valuable when delivering stereotactic body radiation therapy (SBRT). Noncoplanar radiation fields, however, are geometrically more challenging to deliver than coplanar radiation fields, and are associated with a greater risk of collisions between the gantry, treatment couch, and patient. Knowledge of which treatment couch offset, treatment couch angle, and gantry angle combinations provide a collision-free radiotherapy delivery is useful in the treatment planning process, as the risk of requiring replanning due to improperly selected treatment parameters can be minimized. Such tables are by default specific to the linear accelerator make and model used for treatment. In this work a set of plots is presented indicating which combination of treatment couch lateral offsets (-10 cm to 10 cm), couch angles (270° to 90°), and gantry angles (0° to 360°), will result in collision-free radiation delivery using Siemens ONCOR linear accelerators equipped with a 160-leaf multileaf collimator and a 550 TxT treatment table, and a Elekta Infinity linear accelerator with an MLCi2 and Elekta iBEAM evo Couchtop EP. The patient was assumed to have a width of 50 cm and a height of 25 cm.

Models, Theoretical

Radiotherapy Dosage

Patient Positioning - methods

Particle Accelerators - instrumentation

Radiotherapy Planning, Computer-Assisted - methods

Humans

Radiotherapy Planning, Computer-Assisted - instrumentation

Quality Assurance, Health Care - methods

Details

Title: Subtitle: Collision indicator charts for gantry-couch position combinations for Siemens ONCOR and Elekta Infinity linacs
Creators: Stewart J Becker - NYU Langone Medical Center. stewart.becker@nyumc.org
Wes Culberson
Ryan Flynn
Resource Type: Journal article
Publication Details: Journal of applied clinical medical physics, Vol.14(5), pp.278-283
DOI: 10.1120/jacmp.v14i5.4355
PMID: 24036873
PMCID: PMC5714576
NLM abbreviation: J Appl Clin Med Phys
ISSN: 1526-9914
eISSN: 1526-9914
Publisher: United States
Language: English
Date published: 09/06/2013
Academic Unit: Radiation Oncology
Record Identifier: 9984047691102771

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