Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


csu1304966508.pdf (3.79 MB)

ETD Abstract Container

Abstract Header

PARTIAL-DATA INTERPOLATION DURING ARCING OF AN X-RAY TUBE IN A COMPUTED TOMOGRAPHY SCANNER

Rajwade, Jaisingh
http://rave.ohiolink.edu/etdc/view?acc_num=csu1304966508

Abstract Details

2011, Doctor of Engineering, Cleveland State University, Fenn College of Engineering.
X-ray tubes are used in computed tomography (CT) scanners as the energy source for generation of images. These tubes occasionally tend to arc, an undesired phenomenon where high current surges through the tube. During the time that the x-ray tube recovers to full voltage after an arc, image data is being collected. Normally this data, acquired at less than full voltage, is discarded and interpolation is performed over the arc duration. However, this is not ideal and some residual imperfections in images, called artifacts, still remain. Proposed here is an algorithm that corrects for improper tube voltage, allowing previously discarded data to be used for imaging. Instead of throwing away all data during the arc period, we use some of the data that is available as the voltage is rising back to its programmed value. This method reduces the length of the interpolation period, thus reducing artifacts. Results of implementation on a CT scanner show that there is an improvement in image quality using the partial-data interpolation method when compared to standard interpolation and that we can save up to 30% of data from being lost during an arc. With the continuous drive from the imaging field to have faster scanners with short image acquisition times, adverse effects due to arcing are becoming more significant and the improvement proposed in this research is increasingly relevant.
Daniel Simon, Dr (Committee Chair)
Zhiqiang Gao, Dr (Committee Member)
Ana Stankovic, Dr (Committee Member)
Vijaya Konangi, Dr (Committee Member)
James Lock, Dr (Committee Member)
120 p.
Electrical Engineering
x-ray; arcs; arcing; reconstruction; artifacts; tomography; interpolation; imaging

Recommended Citations

Citations

  • Rajwade, J. (2011). PARTIAL-DATA INTERPOLATION DURING ARCING OF AN X-RAY TUBE IN A COMPUTED TOMOGRAPHY SCANNER [Doctoral dissertation, Cleveland State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=csu1304966508

    APA Style (7th edition)

  • Rajwade, Jaisingh. PARTIAL-DATA INTERPOLATION DURING ARCING OF AN X-RAY TUBE IN A COMPUTED TOMOGRAPHY SCANNER. 2011. Cleveland State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=csu1304966508.

    MLA Style (8th edition)

  • Rajwade, Jaisingh. "PARTIAL-DATA INTERPOLATION DURING ARCING OF AN X-RAY TUBE IN A COMPUTED TOMOGRAPHY SCANNER." Doctoral dissertation, Cleveland State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1304966508

    Chicago Manual of Style (17th edition)

csu1304966508
1,518
© 2011, all rights reserved.
This open access ETD is published by Cleveland State University and OhioLINK.