Lung cancer radiation therapy (RT) is associated with complex geometrical uncertainties,
such as respiratory motion, differential baseline shifts between primary tumor and involved …

Patient motion impacts single photon emission computed tomography (SPECT), positron
emission tomography (PET) and x-ray computed tomography (CT) by giving rise to …

Respiratory motion degrades anatomic position reproducibility during imaging, necessitates
larger margins during radiotherapy planning and causes errors during radiation delivery …

On-board CBCT images are used to generate patient geometric models to assist patient
setup. The image data can also, potentially, be used for dose reconstruction in combination …

Purpose: To describe approaches to four-dimensional (4D) treatment planning, including
acquisition of 4D-CT scans, target delineation of spatio-temporal image data sets, 4D dose …

Purpose: Four-dimensional (4D) respiration-correlated imaging techniques can be used to
obtain (respiration) artifact-free computed tomography (CT) images of the thorax. Current …

This paper reviews recent advances in 4D medical imaging (4DMI) and 4D radiation therapy
(4DRT), which study, characterize, and minimize patient motion during the processes of …

Purpose: High local control rates have been reported with stereotactic radiotherapy (SRT)
for Stage I non–small-cell lung cancer. Because high-dose fractions are used, reduction in …

Purpose: When using non–patient-specific treatment planning margins, respiratory motion
may lead to geometric miss of the target while unnecessarily irradiating normal tissue …

Subject motion is unavoidable in clinical and research imaging studies. Breathing is the
most important source of motion in whole-body PET and MRI studies, affecting not only …