ArticlePhysics and imaging in radiation oncology2025
Electrocardiogram-gated cardiac computed tomography-based patient- and segment-specific cardiac motion estimation method in stereotactic arrhythmia radioablation for ventricular tachycardia.
Article in Physics and imaging in radiation oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- The role of abdominal compression in the reduction of respiratory motion for cardiac radioablation.Journal of applied clinical medical physics · 2026Article
- Cardiac device motion tracking from kilovoltage projections during stereotactic arrhythmia radioablation.Physics and imaging in radiation oncology · 2026Article
- Robustness evaluation of carbon ion radiotherapy for ventricular tachycardia.Physics and imaging in radiation oncology · 2026Article
- Margins to account for cardiac and respiratory motion in cardiac radioablation.Medical physics · 2025Article
- A motion analysis of cardiac substructures for guiding stereotactic arrhythmia radiotherapy motion management.Medical physics · 2025Article
- Comparison of proton and photon therapy in stereotactic arrhythmia radioablation for ventricular tachycardia.Physics and imaging in radiation oncology · 2025Article
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Authors and funding
30 authors.
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Abstract
Background and purpose: Motion management strategies such as gating under breath-hold can reduce breathing-induced motion during stereotactic arrhythmia radioablation (STAR) for refractory ventricular tachycardia. However, heartbeat-induced motion is essential to define an appropriate cardiac internal target volume (ITV) margin. In this study, we introduce a patient- and segment-specific cardiac motion estimation method and cardiac motion data of the clinical target volume (CTV), ICD lead tips and left ventricle (LV) segments. Materials and methods: Data from 10 STAR-treated patients were retrospectively analyzed. The LV was semi-automatically segmented according to the 17-segment model. Electrocardiogram-gated contrast-enhanced breath-hold cardiac CTs were automatically non-rigidly registered for motion estimation. The correlation and significant differences between ICD tip motion and CTV motion were assessed using the Pearson correlation coefficient (PCC) and Wilcoxon signed-rank test, while spatial discrepancies with both CTV and segment motion were quantified using the Euclidean distance. Results: The CTVs (center of mass) moved 3.4 ± 1.4 mm and the ICD lead tips moved 4.9 ± 2.2 mm. The maximum motion per patient was observed in basal and mid-cavity LV segments in 3D. The PCC showed a strong positive motion correlation between the ICD tip and CTV in 3D (0.84), while the p-values indicated statistically significant differences in the right-left, anterior-posterior and 3D directions. Conclusion: The proposed methods enable patient- and segment-specific cardiac ITV margin estimation. The motion in most LV segments was limited, however, cardiac ITV margins may need adjustment in individual cases. The impact of cardiac motion on the dosimetry needs further investigation.
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