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
OG exemplary drawing
 
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.