TY - JOUR
T1 - Multislice helical CT
T2 - image temporal resolution
AU - Hu, Hui
AU - Pan, Tinsu
AU - Shen, Yun
N1 - Funding Information:
Manuscript received August 30, 1999; revised February 24, 2000. This work was supported partially by the National Science Foundation Award DMI-9661717. The Associate Editor responsible for coordinating the review of this paper and recommending its publication were M. Defrise. Asterisk indicates corresponding author. *H. Hu is with ImagingTech, Inc., Waukesha, WI 53186 USA (e-mail: hui.hu@imagingtechinc.com).
PY - 2000/5
Y1 - 2000/5
N2 - A multislice helical computed tomography (CT) half-scan (HS) reconstruction algorithm is proposed for cardiac applications. The imaging performances (in terms of the temporal resolution, z-axis resolution, image noise, and image artifacts) of the HS algorithm are compared to the existing algorithms using theoretical models and clinical data. A theoretical model of the temporal resolution performance (in terms of the temporal sensitivity profile) is established for helical CT, in general, i.e., for any number of detector rows and any reconstruction algorithm used. It is concluded that the HS reconstruction results in improved image temporal resolution than the corresponding 180° LI (linear interpolation) reconstruction and is more immune to the inconsistent data problem induced by cardiac motions. The temporal resolution of multislice helical CT with the HS algorithm is comparable to that of single-slice helical CT with the HS algorithm. In practice, the 180° LI and HS-LI algorithms can be used in parallel to generate two image sets from the same scan acquisition, one (180° LI) for improved z-resolution and noises, and the other (HS-LI) for improved image temporal resolution.
AB - A multislice helical computed tomography (CT) half-scan (HS) reconstruction algorithm is proposed for cardiac applications. The imaging performances (in terms of the temporal resolution, z-axis resolution, image noise, and image artifacts) of the HS algorithm are compared to the existing algorithms using theoretical models and clinical data. A theoretical model of the temporal resolution performance (in terms of the temporal sensitivity profile) is established for helical CT, in general, i.e., for any number of detector rows and any reconstruction algorithm used. It is concluded that the HS reconstruction results in improved image temporal resolution than the corresponding 180° LI (linear interpolation) reconstruction and is more immune to the inconsistent data problem induced by cardiac motions. The temporal resolution of multislice helical CT with the HS algorithm is comparable to that of single-slice helical CT with the HS algorithm. In practice, the 180° LI and HS-LI algorithms can be used in parallel to generate two image sets from the same scan acquisition, one (180° LI) for improved z-resolution and noises, and the other (HS-LI) for improved image temporal resolution.
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U2 - 10.1109/42.870249
DO - 10.1109/42.870249
M3 - Article
C2 - 11021682
AN - SCOPUS:0034187651
SN - 0278-0062
VL - 19
SP - 384
EP - 390
JO - IEEE Transactions on Medical Imaging
JF - IEEE Transactions on Medical Imaging
IS - 5
ER -