Evidence map›Paper›PMID 28830239›Full record

ArticleThe British journal of radiology2017

A robotic C-arm cone beam CT system for image-guided proton therapy: design and performance.

Chiaho Hua, Weiguang Yao, Takao Kidani, Kazuo Tomida, Saori Ozawa, Takenori Nishimura, Tatsuya Fujisawa, Ryousuke Shinagawa, Thomas E Merchant

Abstract read
In one paragraph

Article in The British journal of radiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. A systematic review of volumetric image guidance in proton therapy.Physical and engineering sciences in medicine · 2023
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  16. Image guidance in proton therapy for lung cancer.Translational lung cancer research · 2018
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Chiaho Hua1 Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA.
Weiguang Yao1 Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA.
Takao Kidani2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Kazuo Tomida2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Saori Ozawa2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Takenori Nishimura2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Tatsuya Fujisawa2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Ryousuke Shinagawa2 Proton Therapy Systems Design Department, Hitachi Ltd, Hitachi-shi, Japan.
Thomas E Merchant1 Department of Radiation Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveA ceiling-mounted robotic C-arm cone beam CT (CBCT) system was developed for use with a 190° proton gantry system and a 6-degree-of-freedom robotic patient positioner. We report on the mechanical design, system accuracy, image quality, image guidance accuracy, imaging dose, workflow, safety and collision-avoidance.

methodsThe robotic CBCT system couples a rotating C-ring to the C-arm concentrically with a kV X-ray tube and a flat-panel imager mounted to the C-ring. CBCT images are acquired with flex correction and maximally 360° rotation for a 53 cm field of view. The system was designed for clinical use with three imaging locations. Anthropomorphic phantoms were imaged to evaluate the image guidance accuracy.

resultsThe position accuracy and repeatability of the robotic C-arm was high (<0.5 mm), as measured with a high-accuracy laser tracker. The isocentric accuracy of the C-ring rotation was within 0.7 mm. The coincidence of CBCT imaging and radiation isocentre was better than 1 mm. The average image guidance accuracy was within 1 mm and 1° for the anthropomorphic phantoms tested. Daily volumetric imaging for proton patient positioning was specified for routine clinical practice.

conclusionOur novel gantry-independent robotic CBCT system provides high-accuracy volumetric image guidance for proton therapy. Advances in knowledge: Ceiling-mounted robotic CBCT provides a viable option than CT on-rails for partial gantry and fixed-beam proton systems with the added advantage of acquiring images at the treatment isocentre.

Indexed as

Equipment DesignCone-Beam Computed TomographyContrast MediaPhantoms, ImagingProton TherapyRadiographic Image EnhancementRadiotherapy, Intensity-ModulatedReproducibility of ResultsRoboticsContrast Media

Identifiers

PMID28830239
PMCPMC5963391

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.