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Panoramic endoluminal display with minimal image distortion using circumferential radial ray-casting for primary three-dimensional interpretation of CT colonography

  • Gastrointestinal
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Abstract

The purpose of this study was to develop a panoramic endoluminal display technique, the band view, which causes minimal image distortion, and to determine its feasibility as a time-efficient primary three-dimensional review method of CT colonography (CTC). Image distortion was compared between the band view and four other three-dimensional review modes using ten 10-mm and ten 20-mm electronically generated polyps. Diagnostic performance and interpretation time were compared between the band view and the conventional endoluminal view by two independent readers in 52 patients who underwent CTC and colonoscopy on the same day. Mean image distortion index values, in which 1 indicates no distortion and the larger value represents greater distortion, were significantly smaller with the band view (1.03 and 1.01 for 10-mm and 20-mm polyps, respectively) than with the filet view (1.65 and 1.55) or the virtual colon dissection (3.27 and 3.85) (P ≤ 0.004). The sensitivity and specificity for detecting adenomatous polyps ≥6 mm did not differ, but the mean interpretation time was significantly shorter with the band view than with the conventional endoluminal view by 1.8 and 4.5 minutes in readers 1 and 2, respectively (P < 0.0001). The band view can be a time-efficient alternative for primary three-dimensional review of CTC.

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Acknowledgments

We thank Bonnie Hami, MA, USA, for assisting with manuscript editing.

This work was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2007–331-E00156).

Author information

Author notes

  1. Min Woo Lee

    Present address: Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Ilwon-dong, Kangnam-ku, Seoul, 135–710, Korea

Authors and Affiliations

  1. Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 388–1, Pungnap-2dong, Songpa-gu, Seoul, 138–736, Korea

    Seung Soo Lee, Seong Ho Park, Namkug Kim, Jeongjin Lee, Ah Young Kim & Hyun Kwon Ha

  2. INFINITT Co., Ltd., 182–4, Guro-dong, Guro-gu, Seoul, 152–050, Korea

    Jin Kook Kim

  3. Department of Radiology, Korea University College of Medicine, 126–1, 5-Ka Anam-dong, Seongbuk-gu, Seoul, 136–705, Korea

    Beom Jin Park

  4. Department of Radiology, Konkuk University School of Medicine, Konkuk University Hospital, 4–12, Hwayang-dong, Kwangjin-gu, Seoul, 143–729, Korea

    Young Jun Kim & Min Woo Lee

Authors
  1. Seung Soo Lee
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  2. Seong Ho Park
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  3. Jin Kook Kim
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  8. Min Woo Lee
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Corresponding author

Correspondence to Seong Ho Park.

Additional information

This work was suppported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2007–331-E00156). None of the authors have any affiliation with the organization. One author, Jin Kook Kim, is an employee of Infinitt (Seoul, Korea), which provided the software program for the study. All the other authors who are not employees of or consultants for Infinitt have full control of all primary data. All authors agree to allow the journal to review their data if requested.

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Movie 1

A video clip of virtual colon navigation using the band view from the transverse colon to the cecum in a 50-year-old woman with a 13-mm pedunculated tubular adenoma in the hepatic flexure (the same patient as in Fig. 1). (M1V 620 MB).

Movie 2a

Virtual colon navigation from the proximal transverse colon to the ascending colon with the band view (a) and with the filet view (b). Each movie clip shows three 10-mm synthetic polyps, located in the inner and outer curvatures of the hepatic flexure and in the ascending colon, respectively. The band view (a) produces less image distortion than the filet view (b). (M1V 4.49 MB).

Movie 2b

(M1V 380 MB).

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Lee, S.S., Park, S.H., Kim, J.K. et al. Panoramic endoluminal display with minimal image distortion using circumferential radial ray-casting for primary three-dimensional interpretation of CT colonography. Eur Radiol 19, 1951–1959 (2009). https://doi.org/10.1007/s00330-009-1362-1

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  • DOI: https://doi.org/10.1007/s00330-009-1362-1

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