Anthropomorphic thorax phantom for cardio-respiratory motion simulation in tomographic imaging
| Autor: | Klaus P. Schäfers, Björn Czekalla, Florian Büther, Lynn J. Frohwein, Konstantin Bolwin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Respiratory-Gated Imaging Techniques
Radiography Imaging phantom 030218 nuclear medicine & medical imaging Motion 03 medical and health sciences 0302 clinical medicine Positron Emission Tomography Computed Tomography Medical imaging Humans Medicine Computer Simulation Radiology Nuclear Medicine and imaging Lung Tomographic reconstruction Radiological and Ultrasound Technology medicine.diagnostic_test Phantoms Imaging business.industry Respiration Heart Magnetic resonance imaging Magnetic Resonance Imaging Positron emission tomography 030220 oncology & carcinogenesis Radiography Thoracic Tomography Nuclear medicine business Emission computed tomography |
| Zdroj: | Physics in Medicine and Biology. 63:035009 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/1361-6560/aaa201 |
| Popis: | Patient motion during medical imaging using techniques such as computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), or single emission computed tomography (SPECT) is well known to degrade images, leading to blurring effects or severe artifacts. Motion correction methods try to overcome these degrading effects. However, they need to be validated under realistic conditions. In this work, a sophisticated anthropomorphic thorax phantom is presented that combines several aspects of a simulator for cardio-respiratory motion. The phantom allows us to simulate various types of cardio-respiratory motions inside a human-like thorax, including features such as inflatable lungs, beating left ventricular myocardium, respiration-induced motion of the left ventricle, moving lung lesions, and moving coronary artery plaques. The phantom is constructed to be MR-compatible. This means that we can not only perform studies in PET, SPECT and CT, but also inside an MRI system. The technical features of the anthropomorphic thorax phantom Wilhelm are presented with regard to simulating motion effects in hybrid emission tomography and radiotherapy. This is supplemented by a study on the detectability of small coronary plaque lesions in PET/CT under the influence of cardio-respiratory motion, and a study on the accuracy of left ventricular blood volumes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|