Intensity-Based Registration for Lung Motion Estimation
, and the other is defined as the fixed or target image. The transform defines how points from the moving image are mapping to their corresponding points in the fixed…
Estimation of Lung Ventilation
), but their application is constrained by low spatial resolution. Hyperpolarized helium-3 or xenon-129 MR has been developed for functional imaging of pulmonary ventilation and it avoids the concern about…
Computational Motion Phantoms and Statistical Models of Respiratory Motion
by Philips Healthcare to support the delineation of structures of interest, i.e. the organs at risk [32]). Fig. 10.1 Examples for different representation types of computational phantoms: a stylized mathematical…
Feature-Based Registration Techniques
, Tobias Klinder1 and Jens von Berg1 (1) Philips Research Laboratories, Hamburg, Germany Jens von Berg Email: cristian.lorenz@philips.com Abstract In contrast to intensity-based image registration, where a similarity measure is typically evaluated at…
Estimating Internal Respiratory Motion from Respiratory Surrogate Signals Using Correspondence Models
Fig. 9.1 An illustration of how a correspondence model is typically built. Prior to treatment one or more respiratory surrogate signals are acquired simultaneously with imaging data. The motion of…
Intensity-Based Deformable Registration: Introduction and Overview
Fig. 6.1 Number of full-length papers by year available on PubMed dealing with deformable registration for radiation therapy. The numbers documented correspond to the hits of a search with terms…
Biophysical Modeling of Respiratory Organ Motion
) image sequences, often without concerning knowledge about anatomy and physiology in detail. In contrast, biophysical approaches aim at identification of anatomical and physiological aspects of breathing dynamics that are…
Helical 4D CT and Comparison with Cine 4D CT
ms) is the Somatom Definition dual-source CT scanner [5] (Siemens Medical Solutions USA, Malvern, PA). Cardiac CT is a non-invasive clinical procedure to image the coronary arteries and was the…
Respiratory Motion Correction in Cone-Beam CT for Image-Guided Radiotherapy
which is a function of the acquisition time . One acquisition consists of a set of projection images with the coordinates of the 2D flat panel for the projection image…
Validation and Comparison of Approaches to Respiratory Motion Estimation
Fig. 8.1 Example of a landmark in a lung CT data set, selected by three medical experts. It can be seen that manual landmark selection and subsequent quantitative registration evaluation…
