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Title: SU-E-J-256: Dual Energy Planar Image Based Localization in the Absence of On-Board CT Images

Abstract

Purpose: To develop a tool enabling soft tissue based image guidance using dual energy radiographs for cases when on-board CT is not available. Method: Dual energy planar radiographs can be applied to image guidance for targeting lung lesions because the bone based alignment only may not be sufficient as the lesions move. We acquired images of an anthropomorphic thorax phantom at 120 and 60 KVp respectively. Using a weighted logarithmic subtraction of these dual energy images, a soft tissue enhanced and a bone enhanced image were generated and they could be used for the image guidance purpose. Similar processing was also applied to a dual energy image set acquired for a patient undergoing a proton therapy. Results: The soft tissue enhanced images suppressed bones (ribs and scapula) overlying on lung, thus enabling a better visualization of soft tissue and lesion, while the bone enhanced image suppressed the soft tissue. These enhanced effects were visually apparent without further processing for display enhancements, such as using histogram or edge enhancement technique. Conclusions: The phantom image processing was encouraging. The initial test on the patient image set showed that other post processing might still be able to add value in visualizing soft tissuesmore » in addition to the dual energy soft tissue enhancement. More evaluations are needed to determine the potential benefit of this technique in the clinic.« less

Authors:
; ;  [1]
  1. M.D. Anderson Cancer Center, Houston, TX (United States)
Publication Date:
OSTI Identifier:
22339938
Resource Type:
Journal Article
Journal Name:
Medical Physics
Additional Journal Information:
Journal Volume: 41; Journal Issue: 6; Other Information: (c) 2014 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; ANIMAL TISSUES; COMPUTERIZED TOMOGRAPHY; IMAGE PROCESSING; IMAGES; LUNGS; PHANTOMS; PLANT TISSUES; RADIOTHERAPY; SKELETON

Citation Formats

Sadagopan, R, Yang, J, and Li, H. SU-E-J-256: Dual Energy Planar Image Based Localization in the Absence of On-Board CT Images. United States: N. p., 2014. Web. doi:10.1118/1.4888310.
Sadagopan, R, Yang, J, & Li, H. SU-E-J-256: Dual Energy Planar Image Based Localization in the Absence of On-Board CT Images. United States. https://doi.org/10.1118/1.4888310
Sadagopan, R, Yang, J, and Li, H. 2014. "SU-E-J-256: Dual Energy Planar Image Based Localization in the Absence of On-Board CT Images". United States. https://doi.org/10.1118/1.4888310.
@article{osti_22339938,
title = {SU-E-J-256: Dual Energy Planar Image Based Localization in the Absence of On-Board CT Images},
author = {Sadagopan, R and Yang, J and Li, H},
abstractNote = {Purpose: To develop a tool enabling soft tissue based image guidance using dual energy radiographs for cases when on-board CT is not available. Method: Dual energy planar radiographs can be applied to image guidance for targeting lung lesions because the bone based alignment only may not be sufficient as the lesions move. We acquired images of an anthropomorphic thorax phantom at 120 and 60 KVp respectively. Using a weighted logarithmic subtraction of these dual energy images, a soft tissue enhanced and a bone enhanced image were generated and they could be used for the image guidance purpose. Similar processing was also applied to a dual energy image set acquired for a patient undergoing a proton therapy. Results: The soft tissue enhanced images suppressed bones (ribs and scapula) overlying on lung, thus enabling a better visualization of soft tissue and lesion, while the bone enhanced image suppressed the soft tissue. These enhanced effects were visually apparent without further processing for display enhancements, such as using histogram or edge enhancement technique. Conclusions: The phantom image processing was encouraging. The initial test on the patient image set showed that other post processing might still be able to add value in visualizing soft tissues in addition to the dual energy soft tissue enhancement. More evaluations are needed to determine the potential benefit of this technique in the clinic.},
doi = {10.1118/1.4888310},
url = {https://www.osti.gov/biblio/22339938}, journal = {Medical Physics},
issn = {0094-2405},
number = 6,
volume = 41,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 2014},
month = {Sun Jun 01 00:00:00 EDT 2014}
}