Diagnostic accuracy of the double-contrast enema for colonic polyps in patients with or without diverticular disease

Morosi, Carlo; Ballardini, G.; Pisani, Paola; Bellomi, Massimo; Cozzi, G.; Vidale, M.; Spinelli, P; Severini, A

doi:10.1007/bf01887386

Cited by 13 publications

(5 citation statements)

References 16 publications

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“…MRI is highly accurate and reliable for prediction of the CRM [33,34]. In their most recent study of 98 rectal cancer patients, Brown et al [27] reported a 92% agreement between MRI images and histologic findings for prediction of CRM involvement. In another study assessing the tumor relationship to the mesorectal fascia, two observers independently scored the tumor stage and the distance to the mesorectal fascia on MRI and compared these observations with the final histological findings [26].…”

Section: Crmmentioning

confidence: 99%

“…However, some problems remain with T stage determination on MR imaging. Overall, the agreement between MRI and histology for T staging has ranged from 66%-94% [18,[26][27][28]. One of the main problems of T staging on MRI is the distinction between T2 and T3 tumors.…”

Section: T Stagingmentioning

confidence: 99%

“…This reaction makes it difficult to distinguish between spiculation in the perirectal fat caused by fibrosis alone from that caused by fibrous tissue that contains tumor cells [26]. In contrast, MRI has been shown to be more accurate in imaging the more advanced tumors (T4) [27,29]. According to a metaanalysis, MRI for T4 lesions has a specificity of 96% [30].…”

Section: T Stagingmentioning

confidence: 99%

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Diagnostic Modalities in Colorectal Cancer –Endoscopy, Ct and Pet Scanning, Magnetic Resonance Imaging (Mri), Endoluminal Ultrasound and Intraoperative Ultrasound

Ignatov¹,

Kolev²,

Tonev³

et al. 2014

Colorectal Cancer - Surgery, Diagnostics and Treatment

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malignant pathology and by obtaining more tissue sampling and/or a second opinion from a consulting pathologist in none diagnostic, highly suspected colon lesion. Besides the role as a diagnostic tool in CRC, colonoscopy identifies subsequent lesions at the time of surgery, which is called preoperative endoscopic marking. It is performed through metallic clip placement and endoscopic tattooing. The colonoscopic equipment consists of camera and four-way tip controls [43]. The camera can produce images of high-definition quality. The four way tip controls include (1) examination of a found patch to confirm an abnormal growth; (2) insufflating air to dilate the lumen for mucosal inspection and relieving air after examination, (3) irrigating a suspected region; (4) suctioning to avoid missing lesions under fluid, and (5) inserting biopsy devices. The patient must undergo bowel preparation-taking clear liquid diet and ingesting laxative solutions for colon cleansing the day before examination. Sedation is needed to relieve the discomfort during the procedure, but it increases the costs. The complication of sedation are different cardiac disturbances such as hypotension, arrhythmias,oxygen desaturation, and others. The preparation with purgatives may cause abdominal discomfort, nausea, and other symptoms. The colonoscopy continues from 30 minutes to an hour. The risk during colonoscopy consists in colonic perforation in 0,1 % of cases. Colonoscopy fails to visualize the entire colon in 10-15% and it may miss up to 10-20% of polyps fewer than 10 mm. Colonoscopy is golden standard for diagnosing of CRC but there are more symptoms which could be evaluated and appreciated by endoscopic examination, for example-abdominal pain, unexplained gastrointestinal bleeding, diarrhea of unexplained origin, chronic inflammatory bowel disease, etc. It is also the most common interventional modality for polypectomy, hemostasis, balloon dilation, foreign body removal, palliative treatment of neoplasms, etc. Colonoscopy could be the best screening option for all none specific underdiagnosed gastrointestinal symptoms. Colonoscopy removes all detected polyps, regardless of histology type-adenomatous or hyperplastic. Not all of them must undergo resection. The polyps vary in size and polyps under 5 mm are not detected endoscopic. For detection of polyps smaller than 5 mm the virtual colonospcopy is the alternative to the conventional colonoscopy.

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Section: Crmmentioning

confidence: 99%

Section: T Stagingmentioning

confidence: 99%

Section: T Stagingmentioning

confidence: 99%

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Diagnostic Modalities in Colorectal Cancer –Endoscopy, Ct and Pet Scanning, Magnetic Resonance Imaging (Mri), Endoluminal Ultrasound and Intraoperative Ultrasound

Ignatov¹,

Kolev²,

Tonev³

et al. 2014

Colorectal Cancer - Surgery, Diagnostics and Treatment

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show abstract

“…Diagnostic results vary according to the technical quality of this modality and the experience of the interpreter. While some ipvestigators claim that barium enema can be as sensitive and specific as optical colonoscopy, others have reported that the sensitivity achieved with barium enema can be as low as 78% in detection of polyps in the range of 5mm to 20mm in diameter [12].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction and visualization of 3D models of colonic surface

Hong

Zhang

Viswambharant³

et al. 1997

IEEE Trans. Nucl. Sci.

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This paper presents an innovative technology called 30 virtual colonoscopy, which incorporates several advanced visualization techniques to enable the physician to virtually examine the inner surface of the entire colon for identifying and inspecting colonic polyps. We first describe our unique process of acquiring and reconstructing a patient's colon model, followed by the novel visualization algorithms that we have developed to provide automatic planned navigations as well as interactive guided navigations inside the colon. Finally, we present our experimental results on a simulated pipe phantom, the Visible Human data set, and patient data.

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“…Barium enema requires a great deal of physical cooperation from the patient when the X-ray radiographs of the colon are taken at different views. Additionally, its sensitivity can be as low as 78% in detecting polyps in the range of 5mm to 20mm [13].…”

mentioning

confidence: 99%

Virtual voyage

Hong

Muraki²,

Kaufman

et al. 1997

Proceedings of the 24th Annual Conference on Computer Graphics and Interactive Techniques - SIGGRAPH '97

231

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Virtual colonoscopy is a non-invasive computerized medical procedure for examining the entire colon to detect polyps. We present an interactive virtual colonoscopy method, which uses a physicallybased camera control model and a hardware-assisted visibility algorithm. By employing a potential field and rigid body dynamics, our camera control supplies a convenient and intuitive mechanism for examining the colonic surface while avoiding collisions. Our Zbuffer-assisted visibility algorithm culls invisible regions based on their visibility through a chain of portals, thus providing interactive rendering speed. We demonstrate our method with experimental results on a plastic pipe phantom, the Visible Human, and several patients.

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Diagnostic accuracy of the double-contrast enema for colonic polyps in patients with or without diverticular disease

Cited by 13 publications

References 16 publications

Diagnostic Modalities in Colorectal Cancer –Endoscopy, Ct and Pet Scanning, Magnetic Resonance Imaging (Mri), Endoluminal Ultrasound and Intraoperative Ultrasound

Diagnostic Modalities in Colorectal Cancer –Endoscopy, Ct and Pet Scanning, Magnetic Resonance Imaging (Mri), Endoluminal Ultrasound and Intraoperative Ultrasound

Reconstruction and visualization of 3D models of colonic surface

Virtual voyage

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