Biplanar cardiac blood-pool tomography. [Technetium 99]
Dynamic transverse axial wall tomograms of the left verticle (LV) are reconstructed by a new technique from anterior and LAO views acquired with a conventional scintillation camera imaging the distribution of in-vivo Tc-99m-labeled red blood cells. By confining reconstruction to the singular contiguous uniform concentration of activity in the LV, the requisite angular samplings for a given level of accuracy are substantially reduced in this restricted form of emission computed tomography (ECT). Static phantom studies using a series of volumes having various cross-sectional dimensions demonstrate tomographic edge reconstruction with less than or equal to 12% rms radial error. The dynamic cardiac ECT is demonstrated in a series of representative patient studies by reconstruction of wall tomograms in the end-diastolic and end-systolic phases of the 28-frame cardiac cycle. In contrast to the conventional dual multiframe projection views, the motion tomograms derived from the reconstructions clearly show the complete three-dimensional perspective of wall displacement.
- Research Organization:
- Univ. of California, Los Angeles
- OSTI ID:
- 5822358
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 22:10
- Country of Publication:
- United States
- Language:
- English
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