ArticleScientific reports2023
Comparative study of sub-second temporal resolution 4D-MRI and 4D-CT for target motion assessment in a phantom model.
Article in Scientific reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 3 citations in OpenAlex.
- Phantom-based assessment of a modified 4D-MRI protocol for abdominal tumor motion tracking: Effects of sequence parameters and modality comparison.Journal of applied clinical medical physics · 2026Article
- A self-gated 4D-MRI sequence for internal target volume delineation in liver: Phantom and pre-clinical validation.Journal of applied clinical medical physics · 2025Article
- 4D-MRI at 0.55T for internal target volume delineation in liver radiation therapy planning.Medical physics · 2025Article
- Development and first implementation of a novel multi-modality cardiac motion and dosimetry phantom for radiotherapy applications.Medical physics · 2024Article
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To develop and investigate the feasibility of sub-second temporal resolution volumetric T1-weighted four-dimensional (4D-) MRI in comparison with 4D-CT for respiratory-correlated motion assessment using an MRI/CT-compatible phantom. Sub-second high temporal resolution (0.5 s) gradient-echo T1-weighted 4D-MRI was developed using a volumetric acquisition scheme with compressed sensing. An MRI/CT-compatible motion phantom (simulated liver tumor) with three sinusoidal movements of amplitudes and two respiratory patterns was introduced and imaged with 4D-MRI and 4D-CT to investigate the geometric accuracy of the target movement. The geometric accuracy, including centroid position, volume, similarity index of dice similarity coefficient (DSC), and Hausdorff distance (HD), was systematically evaluated. Proposed 4D-MRI achieved a similar geometric accuracy compared with 4D-CT regarding the centroid position, volume, and similarity index. The observed position differences of the absolute average centroid were within 0.08 cm in 4D-MRI and 0.03 cm in 4D-CT, less than the 1-pixel resolution for each modality. The observed volume difference in 4D-MRI/4D-CT was within 0.73 cm
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