Virtual Colonoscopy Compared With Conventional Colonoscopy for Stricturing Postoperative Recurrence in Crohn's Disease

Biancone, Livia; Fiori, Roberto; Tosti, C.; Marinetti, Alessandro; Catarinacci, Mario; Nigris, Francesca De; Simonetti, Giovanni; Pallone, Francesco

doi:10.1097/00054725-200311000-00001

Cited by 49 publications

(31 citation statements)

References 29 publications

(45 reference statements)

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“…In addition to assessing colonic anastomoses, diagnostic imaging can be used to perform a general body screening to assess pericolic fat tissue and extraintestinal organs, including the liver and lymph nodes. Endoluminal sonogra- phy (ES), virtual CT, MRI, and positron emission tomography (PET)/CT have also been used for these purposes (33)(34)(35)(36)(37)(38)(39)(40). Transrectal or transvaginal ES for the assessment of rectal anastomosis has shown an accuracy of 94% (36).…”

Section: Discussionmentioning

confidence: 99%

“…Because it is widely available, CT is the most commonly used method to assess colonic anastomoses, with high sensitivity values of 73-98% for the detection of anastomotic pathologies (35,36,39). Laghi et al (40) evaluated the impact of contrast-enhanced CT colonography for follow-up in patients with previous colorectal cancer.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the question as to whether virtual colonoscopy is an alternative to optical colonoscopy could not be answered. In another study, virtual CT colonoscopy was used to depict colonic anastomoses in 16 patients with CD (39). While conventional endoscopy revealed perianastomotic recurrence in 15 of 16 patients, these changes were detected by contrast-enhanced virtual CT in only 11 patients, resulting in a sensitivity of 73%.…”

Section: Discussionmentioning

confidence: 99%

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MR colonography for the assessment of colonic anastomoses

Ajaj

Goyen

Langhorst

et al. 2006

Magnetic Resonance Imaging

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Purpose: To assess colonic anastomoses in patients after surgical treatment by means of MR colonography (MRC) in comparison with conventional colonoscopy (CC). Materials and Methods:A total of 39 patients who had previously undergone colonic resection and end-to-endanastomosis were included in the study. MRI was based on a dark-lumen approach. Contrast-enhanced T1-weighted (T1w) three-dimensional (3D) images were collected following the rectal administration of water for colonic distension. The MRC data were evaluated by two radiologists. The criteria employed to evaluate the anastomoses included bowel wall thickening and increased contrast uptake in this region. Furthermore, all other colonic segments were assessed for the presence of pathologies. Results:In 23 and 20 patients the anastomosis was rated to be normal by MRC and CC, respectively. In three patients CC revealed a slight inflammation of the anastomosis that was missed by MRI. A moderate stenosis of the anastomosis without inflammation was detected by MRC in five patients, which was confirmed by CC. In the remaining 11 patients a relevant pathology of the anastomosis was diagnosed by both MRC and CC. Recurrent tumor was diagnosed in two patients with a history of colorectal carcinoma. In the other nine patients inflammation of the anastomosis was seen in seven with Crohn's disease (CD) and two with ulcerative colitis. MRC did not yield any falsepositive findings, resulting in an overall sensitivity/specificity for the assessment of the anastomosis of 84%/100%. Conclusion:MRC represents a promising alternative to CC for the assessment of colonic anastomoses in patients with previous colonic resection.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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MR colonography for the assessment of colonic anastomoses

Ajaj

Goyen

Langhorst

et al. 2006

Magnetic Resonance Imaging

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“…Such CT or MRI-based diagnosis allows a physician to observe the entire intestine even if intestinal stenosis exists. Several researches related to CT or MRI-based diagnosis of Crohn's disease have been proposed [5]- [14]. Lee et al compared the detection accuracy of Crohn's disease on CT and MR enterography and small-bowel followthrough examinations [5].…”

Section: Introductionmentioning

confidence: 99%

“…Commercially available CT colonography computer-aided diagnosis (CAD) systems are applicable for Crohn's disease diagnosis and commonly display 3D images to observe the intestine. Ota et al and Biancone et al utilized a CT colonography CAD system for Crohn's disease diagnosis [13], [14]. However, the shape of the small intestine is much more complex than the large intestine.…”

Section: Introductionmentioning

confidence: 99%

Automated Ulcer Detection Method from CT Images for Computer Aided Diagnosis of Crohn's Disease

Oda

Kitasaka

Watanabe

et al. 2013

IEICE Trans. Inf. & Syst.

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SUMMARYCrohn's disease commonly affects the small and large intestines. Its symptoms include ulcers and intestinal stenosis, and its diagnosis is currently performed using an endoscope. However, because the endoscope cannot pass through the stenosed parts of the intestines, diagnosis of the entire intestines is difficult. A CT image-based method is expected to become an alternative way for the diagnosis of Crohn's disease because it enables observation of the entire intestine even if stenosis exists. To achieve efficient CT image-based diagnosis, diagnostic-aid by computers is required. This paper presents an automated detection method of the surface of ulcers in the small and large intestines from fecal tagging CT images. Ulcers cause rough surfaces on the intestinal wall and consist of small convex and concave (CC) regions. We detect them by blob and inverse-blob structure enhancement filters. A roughness value is utilized to reduce the false positives of the detection results. Many CC regions are concentrated in ulcers. The roughness value evaluates the concentration ratio of the detected regions. Detected regions with low roughness values are removed by a thresholding process. The thickness of the intestinal lumen and the CT values of the surrounding tissue of the intestinal lumen are also used to reduce false positives. Experimental results using ten cases of CT images showed that our proposed method detects 70.6% of ulcers with 12.7 FPs/case. The proposed method detected most of the ulcers.

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