An expert system for electronic cleansing of contrast in CT colonography images

K. N. Manjunath, K. Gopalakrishna Prabhu, P. C. Siddalingaswamy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Clinical interpretation of polyp using Computed Tomography Colonography (CTC) expects a clean colon without any residuals. Electronic cleansing is an image post processing technique in CTC which removes the left out oral contrast from the colon. There are few post processing consequences like soft tissue degradation, incomplete cleansing and pseudo soft tissue structures which results in false positives. The objective of the study was to remove the contrast from colon without losing the tissue details. This paper proposes a novel method to solve the first two problems using a multi-step algorithm. It uses a new edge model based method which involves a) colon segmentation, b) priori information of selective Hounsfield Unit (HU) of different colonic materials at specific tube voltages, c) subtracting the contrast, d) decomposing the materials within colon based on selective HU values, e) removing boundary between air and contrast, f) and applying filters to clean minute particles of improperly tagged endoluminal fluids which appear as noise. The main finding of the study was, soft tissue structures were absolutely preserved after removing contrast. The technique was applied on fecal tagged patient's dataset (40 patients, ∼500 images/patient) where the contrast was not completely removed from the colon. The results were validated by radiologists for any artefacts due to image processing.

Original languageEnglish
Title of host publicationIEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages71-76
Number of pages6
ISBN (Electronic)9781479989966
DOIs
Publication statusPublished - 17-02-2016
Event4th IEEE International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Kuala Lumpur, Malaysia
Duration: 19-10-201521-10-2015

Conference

Conference4th IEEE International Conference on Signal and Image Processing Applications, ICSIPA 2015
CountryMalaysia
CityKuala Lumpur
Period19-10-1521-10-15

Fingerprint

Expert systems
Tissue
Tomography
Processing
Image processing
Degradation
Fluids
Electric potential
Air

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Signal Processing

Cite this

Manjunath, K. N., Prabhu, K. G., & Siddalingaswamy, P. C. (2016). An expert system for electronic cleansing of contrast in CT colonography images. In IEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings (pp. 71-76). [7412166] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICSIPA.2015.7412166
Manjunath, K. N. ; Prabhu, K. Gopalakrishna ; Siddalingaswamy, P. C. / An expert system for electronic cleansing of contrast in CT colonography images. IEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 71-76
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Manjunath, KN, Prabhu, KG & Siddalingaswamy, PC 2016, An expert system for electronic cleansing of contrast in CT colonography images. in IEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings., 7412166, Institute of Electrical and Electronics Engineers Inc., pp. 71-76, 4th IEEE International Conference on Signal and Image Processing Applications, ICSIPA 2015, Kuala Lumpur, Malaysia, 19-10-15. https://doi.org/10.1109/ICSIPA.2015.7412166

An expert system for electronic cleansing of contrast in CT colonography images. / Manjunath, K. N.; Prabhu, K. Gopalakrishna; Siddalingaswamy, P. C.

IEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2016. p. 71-76 7412166.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Manjunath KN, Prabhu KG, Siddalingaswamy PC. An expert system for electronic cleansing of contrast in CT colonography images. In IEEE 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2016. p. 71-76. 7412166 https://doi.org/10.1109/ICSIPA.2015.7412166