US 6,983,182 B2 | ||
Time resolved computed tomography angiography | ||
Charles A. Mistretta, Madison, Wis. (US) | ||
Assigned to Wisconsin Alumni Research Foundation, Madison, Wis. (US) | ||
Filed on Aug. 20, 2002, as Appl. No. 10/219,457. | ||
Application 10/219457 is a continuation in part of application No. 09/767757, filed on Jan. 23, 2001, granted, now 6,487,435. | ||
Application 09/767757 is a continuation in part of application No. 09/600433, granted, now 6,630,828, previously published as PCT/US98/26523, filed on Dec. 11, 1998. | ||
Application 09/600433 is a continuation in part of application No. PCT/US01/08477, filed on Mar. 16, 2001. | ||
Application PCT/US01/08477 is a continuation in part of application No. 09/314227, filed on May 18, 1999, granted, now 6,381,486. | ||
Claims priority of provisional application 60/348110, filed on Nov. 09, 2001. | ||
Claims priority of provisional application 60/193088, filed on Mar. 30, 2000. | ||
Claims priority of provisional application 60/115259, filed on Jan. 08, 1999. | ||
Claims priority of provisional application 60/081409, filed on Apr. 10, 1998. | ||
Prior Publication US 2003/0013953 A1, Jan. 16, 2003 | ||
Int. Cl. A61B 5/05 (2006.01) |
U.S. Cl. 600—425 | 21 Claims |
1. A method for producing an image with a computed tomography (CT) system, the steps comprising:
a) positioning a subject in the CT system;
b) acquiring a first undersampled image data set from a selected region of interest in the subject, the undersampled image
data set comprising a plurality of projections acquired at a corresponding plurality of projection angles;
c) transforming the undersampled image data set to form a corresponding first undersampled k-space data set;
d) repeating steps b) and c) to produce a second undersampled k-space data set from a plurality of projections acquired at
projection angles interleaved with the projection angles used to acquire the first undersampled image data set;
e) combining k-space data from one of said undersampled k-space data sets with peripheral k-space data from the other undersampled
k-space data set; and
f) reconstructing an image of the region of interest by transforming the combined k-space data.
|