Evidence map›Paper›PMID 40681945›Full record

ArticleRadiological physics and technology2025

Enhancing patient positioning precision: a comparative analysis of surface-guided radiation therapy systems.

Takeshi Ohno, Akihiko Kamiguchi, Miki Honda, Yoshinobu Shimohigashi, Akiko Kuraoka, Masahiko Toyota, Yoshifumi Oku, Yushi Niiyama, Tomomi Umeda, Shunichi Osako

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Radiological physics and technology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

10 authors.

Takeshi OhnoDepartment of Health Sciences, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto, Japan. t_oono@kumamoto-u.ac.jp.ORCID http://orcid.org/0000-0002-5946-389X
Akihiko KamiguchiDepartment of Radiology, Saiseikai Kumamoto Hospital, 5-3-1, Chikami, Minami-ku, Kumamoto, Kumamoto, 861-4193, Japan.
Miki HondaDepartment of Radiology, Saiseikai Kumamoto Hospital, 5-3-1, Chikami, Minami-ku, Kumamoto, Kumamoto, 861-4193, Japan.
Yoshinobu ShimohigashiDepartment of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, Kumamoto, 860-8556, Japan.
Akiko KuraokaDepartment of Radiological Technology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, Kumamoto, 860-8556, Japan.
Masahiko ToyotaRadiology Department, Kagoshima University Hospital, 8-35-1 Sakuragaoka, Kagoshima, Kagoshima, 890-8520, Japan.
Yoshifumi OkuRadiology Department, Kagoshima University Hospital, 8-35-1 Sakuragaoka, Kagoshima, Kagoshima, 890-8520, Japan.
Yushi NiiyamaRadiology Department, Kagoshima University Hospital, 8-35-1 Sakuragaoka, Kagoshima, Kagoshima, 890-8520, Japan.
Tomomi UmedaRadiology Department, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
Shunichi OsakoRadiation Therapy Department, Sagara Hospital, Social Medical Corporation Hakuaikai, 3-31, Matsubaracho, Kagoshima, Kagoshima, 892-0833, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study evaluated the positioning precision of various surface-guided radiation therapy (SGRT) systems to enhance patient setup accuracy in radiotherapy. A female torso phantom (Electronics Research & Development Corporation) was employed to assess and compare the accuracy of four SGRT devices: AlignRT (Vision RT, United Kingdom), Catalyst (C-rad AB, Sweden), VOXELAN (Electronics Research&Development Corporation, Okayama, Japan) and ExacTrac Dynamic (Brainlab, Germany). The external body contour was used as a reference surface image. For positioning precision measurement, the treatment couch was moved in predetermined directions, distances, and angles and the amount of movement evaluated by the SGRT system was compared to the known amount. The results demonstrated that while all SGRT systems-maintained positioning errors within nominal precision thresholds (1 mm for translational movements and 1° for rotational movements), significant inter-device variability was observed. AlignRT and ExacTrac Dynamic exhibited superior accuracy across all movement categories. In contrast, Catalyst demonstrated a higher fraction of positioning errors (16.0%) in the abdominal region, primarily due to lower camera resolution and the use of a deformable registration algorithm. VOXELAN displayed increased errors in the anterior-posterior direction, likely due to interpolation-based surface estimation. These findings highlight the need for standardized evaluation protocols to ensure fair comparisons and improve clinical adoption of SGRT systems.

Indexed as

Patient PositioningRadiotherapy, Image-GuidedFemaleHumansPhantoms, ImagingRadiotherapy Planning, Computer-AssistedSurface PropertiesImage-guided radiotherapyOptical surface imagingPositioning precisionSurface-guided radiotherapySystem comparison

Identifiers

PMID40681945

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

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.