Title :
Development of real 4D CT with real-time reconstruction and display
Author :
Endo, M. ; Mori, S. ; Kandatsu, S. ; Tanada, S. ; Sugihara, N. ; Saito, Y. ; Adachi, A. ; Miyazaki, H.
Author_Institution :
Nat. Inst. of Radiol. Sci., Chiba
Abstract :
Since we developed a 256-slice CT-scanner for four-dimensional (4D) imaging of moving organs three years ago, we have evaluated its physical performances, and carried out animal experiments and human studies. These studies suggest that the 256-slice CT-scanner may be useful for examining of moving organs such as heart or lung. In order to investigate usefulness of 256-slice CT-scanner which was suggested by the previous studies, we have developed a new 256-slice CT-scanner (the second model) with improved specifications. Its scan time is 0.5 s/rotation in the highest speed. We can carry out real-time reconstruction and display of dynamic 3D images (4D images) with this scanner. The image characteristics such as spatial resolution, noise and low-contrast detectability were evaluated with stationary phantoms in a single rotation. All characteristics have been improved from those of the first prototype with remarkable improvement of low-contrast detectability and slice sensitivity profile. We are now carrying out clinical study for patients with heart disease and lung cancer to examine its potentials for cardiology and 4D radiation therapy planning
Keywords :
cardiology; computerised tomography; image reconstruction; image resolution; lung; medical image processing; noise; phantoms; 4D radiation therapy planning; cardiology; heart disease; low-contrast detectability; lung cancer; moving organs; noise; real 4D CT; real-time reconstruction; spatial resolution; stationary phantoms; Animal structures; Computed tomography; Heart; Humans; Image reconstruction; Imaging phantoms; Lungs; Performance evaluation; Spatial resolution; Three dimensional displays;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2005 IEEE
Conference_Location :
Fajardo
Print_ISBN :
0-7803-9221-3
DOI :
10.1109/NSSMIC.2005.1596871