Gastrointestinal

European Radiology

, Volume 19, Issue 8, pp 1951-1959

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

  • Seung Soo LeeAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center
  • , Seong Ho ParkAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center Email author 
  • , Jin Kook KimAffiliated withINFINITT Co., Ltd.
  • , Namkug KimAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center
  • , Jeongjin LeeAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center
  • , Beom Jin ParkAffiliated withDepartment of Radiology, Korea University College of Medicine
  • , Young Jun KimAffiliated withDepartment of Radiology, Konkuk University School of Medicine, Konkuk University Hospital
  • , Min Woo LeeAffiliated withDepartment of Radiology, Konkuk University School of Medicine, Konkuk University HospitalDepartment of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
  • , Ah Young KimAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center
    • , Hyun Kwon HaAffiliated withDepartment of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center

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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.

Keywords

Colonography Computed tomographic Colonic polyps Three-dimensional image