Surface-Based Respiratory Motion Classification and Verification

To ensure precise tumor irradiation in radiotherapy a stable breathing pattern is mandatory as tumors are moving due to respiratory motion. Consequentially, irregularities of respiratory patterns have to be detected immediately. The causal motion of tissue also differs due to different physiological types of respiration, e.g., chest- or abdominal breathing. Currently used devices to measure respiratory motion do not incorporate complete surface deformations. Instead only small regions of interest are considered. Thereby, valuable information to detect different breathing patterns and types are lost. In this paper we present a system that uses a novel camera sensor called Time-of-Flight (ToF) for automatic classification and verification of breathing patterns. The proposed algorithm calculates multiple volume signals of different anatomical regions of the upper part of the patient's body. Therefore disjoint regions of interest are defined for both, the patient's abdomen and th...

• Type: Conference
• Year: 2009
• Where: BILDMED
• Authors: Kerstin Müller, Christian Schaller, Jochen Penne, Joachim Hornegger
• Keywords: Abdominal Breathing, BILDMED 2007, BILDMED 2009, Breathing Patterns, Stable Breathing Pattern