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Virtual colonoscopy

Wen-Juan Tang, Zhuang Nie, Wen-Liang Fan, Lan Cheng, Zi-Qiao Lei, Ming Yang
The objective of this study was to evaluate the diagnostic value of 128-slice spiral CT combined with virtual colonoscopy in diagnosis of colorectal cancer. We retrospectively analyzed 45 patients of colorectal diseases who underwent definition AS+128-slice spiral CT combined with virtual colonoscopy after bowel preparation and gas injection to evaluate the clinical diagnostic value of this technology. All the patients received electronic colonoscopy and were confirmed by pathology. In total, colorectal cancer was confirmed in 42 cases and inflammation in 3 cases...
February 2019: Current Medical Science
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No abstract text is available yet for this article.
March 2019: Endoscopy
Michael A Scaffidi, Rishad Khan, Catharine M Walsh, Matthew Pearl, Kathleen Winger, Ruben Kalaichandran, Peter Lin, Samir C Grover
BACKGROUND: Simulation-based training (SBT) provides a safe environment and effective means to enhance skills development. Simulation-based curricula have been developed for a number of procedures, including gastrointestinal endoscopy. Gamification, which is the application of game-design principles to non-game contexts, is an instructional strategy with potential to enhance learning. No studies have investigated the effects of a comprehensive gamification curriculum on the acquisition of endoscopic skills among novice endoscopists...
February 24, 2019: BMJ Open
Seyedkoosha Mirhosseini, Ievgeniia Gutenko, Sushant Ojal, Joseph Marino, Arie Kaufman
Virtual colonoscopy (VC) is a non-invasive screening tool for colorectal polyps which employs volume visualization of a colon model reconstructed from a CT scan of the patient's abdomen. We present an immersive analytics system for VC which enhances and improves the traditional desktop VC through the use of VR technologies. Our system, using a head-mounted display (HMD), includes all of the standard VC features, such as the volume rendered endoluminal fly-through, measurement tool, bookmark modes, electronic biopsy, and slice views...
February 14, 2019: IEEE Transactions on Visualization and Computer Graphics
Niccolò Petrucciani, Tarek Debs, Giuseppe Nigri, Paolo Aurello, Francesco D'Angelo, Jean Gugenheim, Luciano Izzo, Federico Tomassini, Stefano Valabrega
BACKGROUND: Primary colic lymphoma represents a rare disease accounting for the 0.2%-0.6% of all large-bowel malignancies. We here report a case of diffuse large B-cell lymphoma presenting as a left colic stenosis in a patient who had undergo renal transplant 23 years before. CASE REPORT: A 67-years old man presented with recurrent abdominal pain, distension, nausea and constipation since 3 weeks. His past medical history included hepatic and renal polykystose with renal transplant 23 years before...
January 31, 2019: Annali Italiani di Chirurgia
Philip Roelandt, Ingrid Demedts, Hilde Willekens, Talat Bessissow, Lieve Braeye, Georges Coremans, Pieter-Jan Cuyle, Marc Ferrante, Anne-Marie Gevers, Martin Hiele, Maggy Osselaer, Jan Tack, Sabine Tejpar, Marijke Ulenaers, Gert Van Assche, Eric Van Cutsem, Stijn Van Gool, Jaarke Vannoote, Severine Vermeire, Raf Bisschops
BACKGROUND:  To improve detection of mucosal lesions during colonoscopy a number of imaging modalities have been suggested, including high definition and virtual chromoendoscopy. Given the theoretical advantage of these new imaging techniques, we aimed to investigate their use for the detection of polyps in patients referred for colonoscopy in a large tertiary hospital. METHODS:  Demographic, endoscopic, and histological data from 1855 consecutive patients undergoing colonoscopy were collected prospectively...
January 15, 2019: Endoscopy
Tahrin Mahmood, Michael Anthony Scaffidi, Rishad Khan, Samir Chandra Grover
Virtual reality simulation is becoming the standard when beginning endoscopic training. It offers various benefits including learning in a low-stakes environment, improvement of patient safety and optimization of valuable endoscopy time. This is a review of the evidence surrounding virtual reality simulation and its efficacy in teaching endoscopic techniques. There have been 21 randomized controlled trials (RCTs) that have investigated virtual reality simulation as a teaching tool in endoscopy. 10 RCTs studied virtual reality in colonoscopy, 3 in flexible sigmoidoscopy, 5 in esophagogastroduodenoscopy, and 3 in endoscopic retrograde cholangiopancreatography...
December 28, 2018: World Journal of Gastroenterology: WJG
Susanne J Blokzijl, Kirsten F Lamberts, Laurens A van der Waaij, Jacoba M Spikman
OBJECTIVE: This study explored the willingness of patients to start colonoscopy with virtual reality (VR) instead of procedural sedation and analgesia (PSA), as well as their motives and characteristics. There is a growing interest in colonoscopy without PSA. Offering VR as a distraction technique instead of PSA may increase the percentage of colonoscopies without PSA. PATIENTS AND METHODS: A survey with demographic, colonoscopy-related and psychology-related questions was completed by 326 adults referred for colonoscopy with PSA...
December 21, 2018: European Journal of Gastroenterology & Hepatology
Shraddha Gulati, Patrick Dubois, Ben Carter, Victoria Cornelius, Meredith Martyn, Andrew Emmanuel, Amyn Haji, Bu'Hussain Hayee
Background: Chromoendoscopy (CE) is the recommended surveillance technique for colitis, but uptake has been limited and the literature provides scant information on patient experience (PE); imperative to adherence to surveillance programmes. Virtual CE (VCE) by Fujinon Intelligent Colour Enhancement digitally reconstructs mucosal images in real time, without the technical challenges of CE. We performed a multifaceted randomized crossover trial (RCT) to evaluate study feasibility and obtain preliminary comparative procedural and PE data...
December 20, 2018: Inflammatory Bowel Diseases
Francesca Tamarozzi, Dora Buonfrate, Geraldo Badona Monteiro, Joachim Richter, Federico Giovanni Gobbi, Zeno Bisoffi
BACKGROUND: Infection with Schistosoma mansoni is a major cause of morbidity and mortality in endemic areas, and is increasingly diagnosed in migrants and travellers outside transmission areas. Markers for the assessment of morbidity and impact of control programs in endemic areas and for the clinical management of patients in the clinical setting are scant, especially for intestinal involvement. Ultrasonography is well established to evaluate hepatosplenic pathology; on the contrary, ultrasound evaluation of intestinal schistosomiasis is virtually unexplored...
2018: PloS One
Han Hee Lee, Bo-In Lee
From dye-assisted conventional chromoendoscopy to novel virtual chromoendoscopy, image-enhanced endoscopy (IEE) is continuously evolving to meet clinical needs and improve the quality of colonoscopy. Dye-assisted chromoendoscopy using indigo carmine or crystal violet, although slightly old-fashioned, is still useful to emphasize the pit patterns of the colonic mucosa and predict the histological structures of relevant lesions. Equipment-based virtual chromoendoscopy has the advantage of being relatively easy to use...
November 2018: Clinical Endoscopy
Takaaki Higashihara, Akira Okada, Yukiko Kishida, Sayako Maruno, Mimiko Matsumura, Koichi Tamura, Hideki Takano
BACKGROUND: Patients with end-stage kidney disease (ESKD) most commonly complain of gastrointestinal symptoms, such as diarrhea. Diarrhea negatively affects patient quality of life and has miscellaneous etiologies, such as Clostridium difficile-associated diarrhea (CDAD) and ischemic colitis. However, it is sometimes extremely difficult to determine the true etiology given the comorbidities and complications the patients have. A rare cause of diarrhea is ulcerative colitis (UC), which commonly affects the rectum and proximal colon in a continuous fashion...
November 1, 2018: BMC Nephrology
Amy L Cisyk, Zoann Nugent, Robert H Wightman, Harminder Singh, Kirk J McManus
There are a substantial portion of colorectal cancers (CRCs), termed interval CRCs (I-CRCs), that are diagnosed shortly after a negative colonoscopy (i.e., no detectable polyps or CRC) and before recommended follow-up screening. The underlying cause(s) accounting for I-CRCs remain poorly understood, but may involve aberrant biology that drives genome instability. Genetic defects inducing genome instability are pathogenic events that lead to the development and progression of traditional sporadic (Sp-) CRCs...
September 2018: Neoplasia: An International Journal for Oncology Research
Rishad Khan, Joanne Plahouras, Bradley C Johnston, Michael A Scaffidi, Samir C Grover, Catharine M Walsh
BACKGROUND: Endoscopy has traditionally been taught with novices practicing on real patients under the supervision of experienced endoscopists. Recently, the growing awareness of the need for patient safety has brought simulation training to the forefront. Simulation training can provide trainees with the chance to practice their skills in a learner-centred, risk-free environment. It is important to ensure that skills gained through simulation positively transfer to the clinical environment...
August 17, 2018: Cochrane Database of Systematic Reviews
Meghan G Lubner, Christine O Menias, Rashad J Johnson, Ayman H Gaballah, Akram Shaaban, Khaled M Elsayes
Villous lesions are advanced adenomas that manifest most commonly in the colon; however, they can develop throughout the gastrointestinal tract. The duodenum is the most common small-bowel site of these lesions. Although in most cases these are isolated lesions that occur sporadically, patients with certain specific colorectal cancer syndromes, including familial adenomatous polyposis and hereditary nonpolyposis colorectal cancer, may develop multiple advanced adenomas. Villous lesions are important because although they are histologically benign, they may harbor dysplasia and have potential for malignancy...
September 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Saad Nadeem, Xianfeng Gu, Arie E Kaufman
Visualization of medical organs and biological structures is a challenging task because of their complex geometry and the resultant occlusions. Global spherical and planar mapping techniques simplify the complex geometry and resolve the occlusions to aid in visualization. However, while resolving the occlusions these techniques do not preserve the geometric context, making them less suitable for mission-critical biomedical visualization tasks. In this paper, we present a shape-preserving local mapping technique for resolving occlusions locally while preserving the overall geometric context...
December 2018: IEEE Transactions on Visualization and Computer Graphics
Begoña Márquez Argente Del Castillo, José Ramón Olalla Muñoz
Pneumatosis intestinalis refers to lineal or cystic gas collections in the intestinal wall. Pneumatosis cystoides intestinalis (PCI) is a benign primary cause. This is a rare disease characterized by multiple gas cysts in the submucosa or subserosa, principally within the colon.
June 2018: Revista Española de Enfermedades Digestivas
Roberto García-Figueiras, Sandra Baleato-González, Anwar R Padhani, Antonio Luna-Alcalá, Ana Marhuenda, Joan C Vilanova, Iria Osorio-Vázquez, Anxo Martínez-de-Alegría, Antonio Gómez-Caamaño
Imaging techniques are clinical decision-making tools in the evaluation of patients with colorectal cancer (CRC). The aim of this article is to discuss the potential of recent advances in imaging for diagnosis, prognosis, therapy planning, and assessment of response to treatment of CRC. Recent developments and new clinical applications of conventional imaging techniques such as virtual colonoscopy, dual-energy spectral computed tomography, elastography, advanced computing techniques (including volumetric rendering techniques and machine learning), magnetic resonance (MR) imaging-based magnetization transfer, and new liver imaging techniques, which may offer additional clinical information in patients with CRC, are summarized...
May 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Andrew Guinigundo
OBJECTIVE: To examine the viability of colon cancer screening with computed tomography colonography, also known as virtual colonoscopy. DATA SOURCES: Clinical guidelines, published medical research. CONCLUSION: Virtual colonoscopy, under the right circumstances, is an accurate viable screening tool for patients who may not otherwise desire to or are not able to participate in traditional colonoscopy. IMPLICATIONS FOR NURSING PRACTICE: Nurses should be aware that routine colon cancer screening is recommended starting at age 50...
May 2018: Seminars in Oncology Nursing
Manuela Cesaretti, Manuela Trotta, Irene Leale, Giuseppe Antonio Minetti, Giuseppe Cittadini, Fabrizio Montecucco, Giovanni Bruno Camerini, Giacomo Borgonovo
The mobile cecum syndrome includes a spectrum of conditions. The cecal volvulus represents the acute form, with typical feature of a bowel obstruction that needs immediate operative treatment. On the other hand, a chronic form of mobile cecum syndrome which is the most common form reported a history of intermittent crampy abdominal pain, distension, and constipation. In this study, five patients came to our attention during the last ten years, presenting different symptoms due to a mobile cecum. All patients were investigated by several diagnostic techniques according to the specific clinical setting...
2018: Case Reports in Gastrointestinal Medicine
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