Diaphragm motion was less reliable than fiducials for markerless tumor tracking
Tumor–diaphragm geometry varied by approximately 4.5 mm during breathing, substantially more than tumor–fiducial relationships.
Tag
motion-management
Training-free MRI tracking achieved submillimetre motion accuracy in liver metastases
ETLD tracked 106,000 cine-MRI frames with submillimetre error, while integrated segmentation achieved a mean global Dice score of 87.7%.
Surface monitoring detected clinically relevant motion in head and neck radiotherapy
SGRT triggered verification in 15% of head and neck fractions, but almost half of alerts were not confirmed on X-ray imaging.
Abdominal airbag matched plate compression but increased lateral setup error
Airbag compression reduced upper-abdominal respiratory motion comparably to a rigid plate but produced larger left–right setup errors.
Reinforcement learning adapted proton spot delivery across respiratory phases
Patient-specific reinforcement learning improved moving-target coverage over static GTV plans while reducing some normal-tissue exposure compared with ITV planning.
Head and neck positioning management should extend beyond couch correction
Rigid couch correction cannot fully resolve regional posture mismatch, immobilization failure or progressive anatomical change during head and neck radiotherapy.
A 4.5 mm margin covered most intrafraction small-bowel motion during MR-guided radiotherapy
A 4.5 mm isotropic margin covered most observed small-bowel occupancy despite craniocaudal displacements exceeding 20 mm in some patients.
Single-field optimization improved proton LATTICE motion robustness
Single-field optimization improved proton LATTICE motion robustness
VMAT lattice SFRT was deliverable across Edge and Halcyon linacs
VMAT-based lattice SFRT achieved cross-platform deliverability with gamma pass rates above 90% and preserved peak-to-valley dose ratios.
Cherenkov light tracked gold implant motion with submillimetre accuracy in water
Cherenkov light imaging tracked gold implant motion in water with submillimetre accuracy during static and volumetric modulated arc therapy delivery.
Intrafractional motion frequently exceeded tolerance during multi-target stereotactic radiosurgery
After 66% of couch-angle changes, motion exceeded tolerance, and 0.5-millimetre and 0.5-degree errors reduced near-minimum target dose by 7.6%.
Respiratory motion remained small during postoperative whole-breast radiotherapy.
Mean breast target displacement was below 1.3 mm in every direction, with calculated respiratory margins of approximately 1 mm.
Conventional fractionation substantially reduced gastrointestinal motility–driven interplay in pancreatic proton therapy.
Gastrointestinal motility reduced single-fraction target coverage and broadened organ-at-risk dose ranges, while conventional fractionation substantially attenuated the interplay effect.
Multimodal respiratory tracking enabled real-time voxel-wise anatomical reconstruction during radiotherapy
The patient-specific framework outperformed three comparison methods and reconstructed respiratory anatomy in 15.6 milliseconds per frame.
Hybrid respiratory gating mitigated interplay in spot-scanning proton therapy
Hybrid phase-amplitude gating restored dose agreement during regular motion, while irregular breathing increased treatment time and produced inconsistent accuracy.