ArticleJournal of applied clinical medical physics2026
Evaluation of QUASAR Insight Phantom for daily imaging QA of MRgRT linacs.
Article in Journal of applied clinical medical physics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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.
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.
Who cites it
1 citing paper in PubMed.
- Evaluation of QUASAR Insight Phantom for daily imaging QA of MRgRT linacs.Journal of applied clinical medical physics · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeMagnetic resonance imaging (MRI) and its importance in modern radiation therapy requires a standardized daily quality assurance (QA) procedure that is both comprehensive and efficient. Current imaging QA guidelines require a more inclusive analysis of imaging characteristics, as well as a simplification of setup procedures. We have studied the feasibility of using the Insight Phantom to provide consistent images for analyses of uniformity, slice thickness, spatial resolution, and distortion across a large field of view (FOV).
methodsThe large imaging region of the Insight Phantom was imaged using 3D True Fast Imaging with Steady State Precession (TruFi) and analyzed using the Modus QA software. The base and upright section were imaged in coronal, axial, and sagittal orientations over 3 months.
resultsGeometric distortion analysis yielded average maximum distortions within a 210 mm diameter of 0.57, 0.73, and 0.45 mm for axial, sagittal, and coronal orientations, respectively. Similarly, within a 310 mm diameter, average maximum distortions were 0.58, 0.73, and 0.74 mm with no distortions greater than or equal to 1 mm. Average modulation transfer function (MTF) values were 0.431 ± 0.007, 0.436 ± 0.007, and 0.433 ± 0.010 lp/mm for axial, sagittal, and coronal images, respectively. Finally, slice thickness values were consistent at 2.19 ± 0.04, 2.22 ± 0.06, and 2.24 ± 0.07 mm for axial, sagittal, and coronal imaging orientations, respectively. Images were repeatable and setup procedures were quick and straightforward, enhancing therapist workflow and efficiency.
conclusionThe Insight Phantom's large coverage allows a more in-depth analysis of the MRI's large FOV, and its simple setup ensures a repeatable daily QA procedure for therapists. The software also provides a comprehensive analysis of key imaging parameters in a detailed report that can be used to monitor MRI functionality and quality.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.