Initial assessment of tumor tracking with a gimbaled linac system in clinical circumstances: A patient simulation study

Depuydt, Tom; Poels, Kenneth; Verellen, Dirk; Engels, Benedikt; Collen, Christine; Haverbeke, C.; Gevaert, Thierry; Buls, Nico; Gompel, Gert Van; Reynders, Truus; Duchateau, Michaël; Tournel, Koen; Boussaer, M.; Steenbeke, Femke; Vandenbroucke, Frederik; Ridder, Mark De

doi:10.1016/j.radonc.2012.12.015

Cited by 85 publications

(100 citation statements)

References 16 publications

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“…The Vero system (BrainLAB AG, Germany and Mitsubishi Heavy Industries Ltd, Japan) is equipped with a 6MV gimbaled x-ray head integrated in an O-ring-gantry structure capable of rotating around the horizontal axis AE185 with a maximum gantry speed of 7 / s but also around the vertical axis by AE60 with a ring speed of 3 /s (9,10). The image guidance system consists of 2-kV x-ray tubes mounted at AE45 on either side of the MV beam in combination with 2 flat panel detectors.…”

Section: Introductionmentioning

confidence: 99%

Geometric Verification of Dynamic Wave Arc Delivery With the Vero System Using Orthogonal X-ray Fluoroscopic Imaging

Burghelea

Verellen

Gevaert

et al. 2015

International Journal of Radiation Oncology*Biology*Physics

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Section: Introductionmentioning

confidence: 99%

Geometric Verification of Dynamic Wave Arc Delivery With the Vero System Using Orthogonal X-ray Fluoroscopic Imaging

Burghelea

Verellen

Gevaert

et al. 2015

International Journal of Radiation Oncology*Biology*Physics

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“…The greatest movement is produced in the superior–inferior (SI) direction close to the diaphragm, such as with tumors in the lower lung lobes and upper abdominal tumors, such as liver or pancreatic tumors 1. Several methods have been proposed to compensate for respiratory‐induced organ motion, including forced shallow‐breathing, breath holding, respiratory gating, and dynamic tumor tracking (DTT) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. DTT was realized through reasonably accurate real‐time acquisition of the target motion of a patient using external surrogates (indirect DTT) or an internally implanted marker (direct DTT).…”

Section: Introductionmentioning

confidence: 99%

“…The AAPM TG142 report includes a recommendation for general quality assurance (QA) tests for medical accelerators 11. Several investigators reported high tracking accuracies of DTT through the Vero4DRT™ system using video images and an Electronic Portal Imaging Device (EPID) 8, 9, 10. Akimoto et al.…”

Section: Introductionmentioning

confidence: 99%

Quality assurance of a gimbaled head swing verification using feature point tracking

Miura

Ozawa

Enosaki

et al. 2016

J Applied Clin Med Phys

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To perform dynamic tumor tracking (DTT) for clinical applications safely and accurately, gimbaled head swing verification is important. We propose a quantitative gimbaled head swing verification method for daily quality assurance (QA), which uses feature point tracking and a web camera. The web camera was placed on a couch at the same position for every gimbaled head swing verification, and could move based on a determined input function (sinusoidal patterns; amplitude: ± 20 mm; cycle: 3 s) in the pan and tilt directions at isocenter plane. Two continuous images were then analyzed for each feature point using the pyramidal Lucas–Kanade (LK) method, which is an optical flow estimation algorithm. We used a tapped hole as a feature point of the gimbaled head. The period and amplitude were analyzed to acquire a quantitative gimbaled head swing value for daily QA. The mean ± SD of the period were 3.00 ± 0.03 (range: 3.00–3.07) s and 3.00 ± 0.02 (range: 3.00–3.07) s in the pan and tilt directions, respectively. The mean ± SD of the relative displacement were 19.7 ± 0.08 (range: 19.6–19.8) mm and 18.9 ± 0.2 (range: 18.4–19.5) mm in the pan and tilt directions, respectively. The gimbaled head swing was reliable for DTT. We propose a quantitative gimbaled head swing verification method for daily QA using the feature point tracking method and a web camera. Our method can quantitatively assess the gimbaled head swing for daily QA from baseline values, measured at the time of acceptance and commissioning.

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“…There is a novel SBRT platform capable of this therapeutic task [10][11][12] . It separates itself from other SBRT platforms by integrating dual-diagnostic Exactrac kV x-ray units (capable of cone-beam computed tomography target localization) and an infrared camera unit (capable of body surface marker tracking as a surrogate for internal motion) that both allow stereoscopic open-loop feedback of cancer target intrafraction motion.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Kunos

Fabien

Shanahan

et al. 2015

JoVE

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Physicians considering stereotactic ablative body radiation therapy (SBRT) for the treatment of extracranial cancer targets must be aware of the sizeable risks for normal tissue injury and the hazards of physical tumor miss. A first-of-its-kind SBRT platform achieves high-precision ablative radiation treatment through a combination of versatile real-time imaging solutions and sophisticated tumor tracking capabilities. It uses dualdiagnostic kV x-ray units for stereoscopic open-loop feedback of cancer target intrafraction movement occurring as a consequence of respiratory motions and heartbeat. Image-guided feedback drives a gimbaled radiation accelerator (maximum 15 x 15 cm field size) capable of real-time ±4 cm pan-and-tilt action. Robot-driven ±60° pivots of an integrated ±185° rotational gantry allow for coplanar and non-coplanar accelerator beam set-up angles, ultimately permitting unique treatment degrees of freedom. State-of-the-art software aids real-time six dimensional positioning, ensuring irradiation of cancer targets with sub-millimeter accuracy (0.4 mm at isocenter). Use of these features enables treating physicians to steer radiation dose to cancer tumor targets while simultaneously reducing radiation dose to normal tissues. By adding respiration correlated computed tomography (CT) and 2-[ . In this article, we describe new radiation plans for the treatment of moving lung tumors.

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Initial assessment of tumor tracking with a gimbaled linac system in clinical circumstances: A patient simulation study

Cited by 85 publications

References 16 publications

Geometric Verification of Dynamic Wave Arc Delivery With the Vero System Using Orthogonal X-ray Fluoroscopic Imaging

Geometric Verification of Dynamic Wave Arc Delivery With the Vero System Using Orthogonal X-ray Fluoroscopic Imaging

Quality assurance of a gimbaled head swing verification using feature point tracking

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

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