New reconstruction algorithm substantially reduced stack artifacts in breathing-adaptive 4DCT
ZeeFree improved 4DCT image quality and anatomical correctness during irregular breathing without degrading already artifact-free scans.
Tag
motion-management
Ultrasound probe sparing preserved target coverage in photon cardiac radioablation plans
Photon STAR plans kept an echocardiographic probe below 1 Gy without compromising target coverage, although low-dose spread increased modestly.
Fractionation mitigated proton interplay for most free-breathing thoracic treatments
Interplay-related underdosage largely disappeared after five fractions, although two high-motion plans retained clinically relevant target deficits.
Non-invasive ventilation markedly reduced abdominal organ motion during MRI
Mechanical ventilation reduced median liver motion from 29 mm during free breathing to 9 mm at 60 breaths per minute with PEEP.
Nearly one-third of abdominal radiotherapy patients could not maintain planned DIBH
Despite successful simulation, 31.7% required DIBH gate modification or conversion to free breathing during abdominal radiotherapy.
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.
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.