TY - GEN
T1 - Effect of respiratory motion on abdominal C-arm CT angiography using the 4D NCAT phantom
AU - Fung, G. S.K.
AU - Segars, W. P.
AU - Geschwind, J. F.H.
AU - Tsui, B. M.W.
AU - Taguchi, K.
PY - 2007
Y1 - 2007
N2 - With the recent advancement of C-arm angiographic techniques in acquiring the 3D rotational angiography, the system has the ability to reconstruct the CT-like transaxial slices of the scan volume, but at lower image quality compared to those reconstructed from standard CT system. For liver imaging, the scan time can range from 5 to 10 seconds to complete the halfscan coverage for soft tissue imaging protocol. The lengthy scan time could lead to significant motion artifacts in the reconstructed images such as those found in the liver due to respiration motion. In this paper, we employ the 4D NCAT phantom with a realistic model of the respiratory motion to simulate the movements of hepatic artery, liver and other organs. With a physics based x-ray projection simulator, the projection image sequence of the rotational C-arm angiography is generated. Then, a cone-beam filtered backprojection method is employed with the Shepp-Logan Alter to reconstruct the simulated C-arm CT angiography data. As shown in our simulation results, we are able to study the effect of respiratory motion on abdominal C-arm CT angiography images as well as digital subtraction angiography by using the realistic 4D NCAT phantom, projection and reconstruction tools.
AB - With the recent advancement of C-arm angiographic techniques in acquiring the 3D rotational angiography, the system has the ability to reconstruct the CT-like transaxial slices of the scan volume, but at lower image quality compared to those reconstructed from standard CT system. For liver imaging, the scan time can range from 5 to 10 seconds to complete the halfscan coverage for soft tissue imaging protocol. The lengthy scan time could lead to significant motion artifacts in the reconstructed images such as those found in the liver due to respiration motion. In this paper, we employ the 4D NCAT phantom with a realistic model of the respiratory motion to simulate the movements of hepatic artery, liver and other organs. With a physics based x-ray projection simulator, the projection image sequence of the rotational C-arm angiography is generated. Then, a cone-beam filtered backprojection method is employed with the Shepp-Logan Alter to reconstruct the simulated C-arm CT angiography data. As shown in our simulation results, we are able to study the effect of respiratory motion on abdominal C-arm CT angiography images as well as digital subtraction angiography by using the realistic 4D NCAT phantom, projection and reconstruction tools.
UR - http://www.scopus.com/inward/record.url?scp=48149090565&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=48149090565&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2007.4437119
DO - 10.1109/NSSMIC.2007.4437119
M3 - Conference contribution
AN - SCOPUS:48149090565
SN - 1424409233
SN - 9781424409235
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 4536
EP - 4538
BT - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
T2 - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Y2 - 27 October 2007 through 3 November 2007
ER -