Program Information
A Novel Digital Tomosynthesis System Using Orthogonal Scanning Technique: A Feasibility Study
J Kim1*, C Park2 , K Kauweloa3 , Y Chung4 , Y Han5 , S Ju6 , (1) Samsung Medical Center, Seoul, ,(2) University of Florida Health Science Center, Gainesville, FL, (3) UTHSCSA, San Antonio, TX, (4) ,,,(5) Sungkyunkwan University School of Medicine, Seoul, ,(6) Samsung Medical Center, Seoul, Seoul
Presentations
TU-CD-207-5 (Tuesday, July 14, 2015) 10:15 AM - 12:15 PM Room: 207
Purpose:As an alternative to full tomographic imaging technique such as cone-beam computed tomography (CBCT), there is growing interest to adopt digital tomosynthesis (DTS) for the use of diagnostic as well as therapeutic applications. The aim of this study is to propose a new DTS system using novel orthogonal scanning technique, which can provide superior image quality DTS images compared to the conventional DTS scanning system.
Methods:Unlike conventional DTS scanning system, the proposed DTS is reconstructed with two sets of orthogonal patient scans. 1) X-ray projections that are acquired along transverse trajectory and 2) an additional sets of X-ray projections acquired along the vertical direction at the mid angle of the previous transverse scan. To reconstruct DTS, we have used modified filtered backprojection technique to account for the different scanning directions of each projection set. We have evaluated the performance of our method using numerical planning CT data of liver cancer patient and a physical pelvis phantom experiment. The results were compared with conventional DTS techniques with single transverse and vertical scanning.
Results:The experiments on both numerical simulation as well as physical experiment showed that the resolution as well as contrast of anatomical structures was much clearer using our method. Specifically, the image quality comparing with transversely scanned DTS showed that the edge and contrast of anatomical structures along Left-Right (LR) directions was comparable however, considerable discrepancy and enhancement could be observed along Superior-Inferior (SI) direction using our method. The opposite was observed when vertically scanned DTS was compared.
Conclusion:In this study, we propose a novel DTS system using orthogonal scanning technique. The results indicated that the image quality of our novel DTS system was superior compared to conventional DTS system. This makes our DTS system potentially useful in various on-line clinical applications.
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