Cyber Technology, Inc.

Image Acquisition, Reconstruction, and Presentation


All renditions (C) Wolfram R. Jarisch, 1994

Physical Model and Bi-Plane X-Ray Imaging


These studies serve as validation of CTI's 3-D reconstruction algorithm by using a physical  phantom representing the hollow
structure of the (left ventricular) myocardium. X-Ray imaging was performed on the Siemens Bi-Plane System of
Johns Hopkins University, Baltimore, MD.


Physical Model of Myocardium with several "perfusion defects."

Left column: two views of the physical phantom. Left shell is bottom section, right shell is top section.

Right column: two sample x-ray projections of the physical phantom.

X-ray image data colleted on Siemens bi-plane system, Johns Hopkins University, Baltimore, MD.
Model of Myocardium with Perfusion Defect
Reconstruction of bottom section of physical phantom. Left column is from six projections, right column is from 18 projections (used as reference of "true" density). Reconstruction resolution is in an 180-cubed volume.

Note the 12-cornered shape in the left column. From comparison with numerical simulations it is believed that most of this artifact results from the high-pass filter properties of the x-ray imaging chain.

Phantom, Bottom
Reconstruction of top section of physical phantom. Left column is from six projections, right column is from 18 projections (used as reference of "true" density). Reconstruction resolution is in an 180-cubed volume.

Note the 12-cornered shape in the left column. From comparison with numerical simulations it is believed that most of this artifact results from the high-pass filter properties of the x-ray imaging chain.

Phantom, Top




Home   |   About Us    |   Feedback Form   |   Site Map