A method for improved 4D-computed tomography data acquisition.
In four-dimensional time-dependent computed tomography (4D-CT) of the lungs, irregularities in breathing movements can cause errors in data acquisition, or even data loss. We present a method based on sending a synthetic, regular breathing signal to the CT instead of the real signal, which ensures 4D-CT data sets without data loss. Subsequent correction of the signal based on the real breathing curve enables an accurate reconstruction of the size and movement of the target volume. This makes it possible to plan radiation treatment based on the obtained data. The method was tested with dynamic thorax phantom measurements using synthetic and real breathing patterns.
Institut für Materialphysik, Technische Universität Graz, Austria. Electronic address: martin.kupper@tugraz.at.
Martin
M
Kupper
Institut für Materialphysik, Technische Universität Graz, Austria. Electronic address: w.sprengel@tugraz.at.
Wolfgang
W
Sprengel
Universitätsklinik für Strahlentherapie-Radioonkologie, Comprehensive Cancer Center Graz, Medizinische Universität Graz, Austria. Electronic address: peter.winkler@klinikum-graz.at.
Peter
P
Winkler
Universitätsklinik für Strahlentherapie-Radioonkologie, Comprehensive Cancer Center Graz, Medizinische Universität Graz, Austria. Electronic address: brigitte.zurl@klinikum-graz.at.
Brigitte
B
Zurl
D056973:Four-Dimensional Computed Tomography / Q000379:methods*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D000075530:Organ Motion; D019047:Phantoms, Imaging; D012119:Respiration; D014057:Tomography, X-Ray Computed
4D-CT; 4D-CT reconstructions; Irregular breathing; SABR; Unregelmäßige Atmung, Datenverlustfrei, 4D-CT, SABR, 4D-CT Rekonstruktionen, Atmungserkennung; breathing monitoring; data loss free