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CT Colonography

Perry J Pickhardt, Judy Yee, C Daniel Johnson
Since the introduction of CT colonography (CTC) in the mid-1990s, there have been continuous advancements in the examination technique and advanced visualization software for interpretation. This review will cover the origins of CTC as a natural extension of abdominal CT imaging, and discuss the evolution of CTC through the subsequent clinical phases of feasibility, validation, and implementation.
March 7, 2018: Abdominal Radiology
Dennis Raahave
The objective of this review is to examine whether a redundant colon gives rise to symptoms like constipation and volvulus. In 1820, Monterossi made drawings of colons with displacements and elongation of the colon found during autopsy. In 1912, Kienböeck first visualized a redundant colon using bismuth, and Lardennois and Auborg named the anatomic variant dolichocolon in 1914. The criteria were later: A sigmoid loop rising over the line between the iliac crests, a transverse colon below the same line and extra loops at the flexures...
February 27, 2018: World Journal of Gastrointestinal Surgery
Kai Sun, Ruijuan Han, Yang Han, Xuesen Shi, Jiang Hu, Bin Lu
To evaluate the diagnostic accuracy of combined computed tomography colonography (CTC) and dual-energy iodine map imaging for detecting colorectal masses using high-pitch dual-source CT, compared with optical colonography (OC) and histopathologic findings. Twenty-eight consecutive patients were prospectively enrolled in this study. All patients were underwent contrast-enhanced CTC acquisition using dual-energy mode and OC and pathologic examination. The size of the space-occupied mass, the CT value after contrast enhancement, and the iodine value were measured and statistically compared...
February 28, 2018: Scientific Reports
Tsuyoshi Morimoto, Takayuki Yamada, Kunihisa Miyakawa, Yasuo Nakajima
Background: Pericolic fat stranding on computed tomography (CT) scans has been an important feature for staging colon cancer. However, the factors associated with pericolic fat stranding have not been elucidated to date. Purpose: To determine factors associated with pericolic fat stranding of colon cancer on CT colonography (CTC). Material and Methods: Overall, 150 patients with 155 colon cancer lesions were retrospectively assessed by two radiologists for pericolic fat stranding on CTC...
February 2018: Acta Radiologica Open
Miriam P van der Meulen, Iris Lansdorp-Vogelaar, S Lucas Goede, Ernst J Kuipers, Evelien Dekker, Jaap Stoker, Marjolein van Ballegooijen
Purpose To compare the cost-effectiveness of computed tomographic (CT) colonography and colonoscopy screening by using data on unit costs and participation rates from a randomized controlled screening trial in a dedicated screening setting. Materials and Methods Observed participation rates and screening costs from the Colonoscopy or Colonography for Screening, or COCOS, trial were used in a microsimulation model to estimate costs and quality-adjusted life-years (QALYs) gained with colonoscopy and CT colonography screening...
February 27, 2018: Radiology
Laura Filograna, Enrica Filograna, Adolfo D'Onofrio, Nicola Flor, Yusef Haddad, Roberto Floris
Gastrointestinal angiodysplasia represents the cause of 6% of lower gastrointestinal tract bleeding, particularly in the elderly. Because of the common presentation and age range of affected patients, often patients with occult or massive gastrointestinal bleedings are investigated with colonoscopy, in the suspect of colonic cancer. Other methods are capsule enteroscopy, angiography, double-contrast barium enema, computed tomography angiography, and radionuclide scanning. In this contribution, we describe a case of colonic angiodysplasia first suspected during computed tomography colonography performed after an incomplete colonoscopy in a patient with recent anemization...
December 2017: Radiology Case Reports
Courtney C Moreno, Thomas Jarrett, Brianna L Vey, Pardeep K Mittal, Elizabeth A Krupinski, David L Roberts
AIMS: To assess patient knowledge about colorectal cancer incidence and prognosis as well as willingness to undergo screening with various tests (eg, optical colonoscopy, stool-based tests, computed tomographic colonography (CTC)). MATERIALS AND METHODS: A survey was administered to consecutive patients of a general academic-based internal medicine clinic. RESULTS: Survey response rate was 86.3%. A majority of respondents (55%) reported being aware of general information about colorectal cancer, and 99% indicated a belief that colorectal cancer screening was a good idea...
January 6, 2018: Current Problems in Diagnostic Radiology
Anu E Obaro, Andrew A Plumb, Thomas R Fanshawe, Ulysses S Torres, Rachel Baldwin-Cleland, Stuart A Taylor, Steve Halligan, David N Burling
BACKGROUND: CT colonography is highly sensitive for colorectal cancer, but interval or post-imaging colorectal cancer rates (diagnosis of cancer after initial negative CT colonography) are unknown, as are their underlying causes. We did a systematic review and meta-analysis of post-CT colonography and post-imaging colorectal cancer rates and causes to address this gap in understanding. METHODS: We systematically searched MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials...
February 19, 2018: Lancet. Gastroenterology & Hepatology
Perry J Pickhardt
No abstract text is available yet for this article.
February 19, 2018: Lancet. Gastroenterology & Hepatology
Stuart A Taylor, Christian von Wagner
No abstract text is available yet for this article.
March 2018: Radiology
David H Kim
No abstract text is available yet for this article.
February 19, 2018: Abdominal Radiology
Judy Yee, Elizabeth McFarland
A better understanding of the risks and benefits of extracolonic findings and radiation dose will aid in the safe and proper implementation of CT colonography in clinical practice. The majority of extracolonic findings in screening patients are benign and can be ignored by referring physicians. Radiologists also need to be responsible in reporting extracolonic findings. Referring providers must be knowledgeable about the theoretic risks and controversies regarding the use of ionizing radiation. Screening CT colonography imparts a low-level of radiation to patients that is equivalent or less than annual background dose...
February 15, 2018: Abdominal Radiology
Kevin J Chang, David H Kim
CT colonography (CTC) has demonstrated equivalent accuracy to optical colonoscopy in the detection of clinically relevant polyps and tumors but this is only possible when technique is optimized. The two most important features of a high-quality CTC are a well-prepared colon and a distended colon. This article will discuss the dietary, bowel preparation, and fecal/fluid tagging options to best prepare the colon. Strategies to optimally distend the colon will also be discussed. CT scan techniques including patient positioning and radiation dose optimization will be reviewed...
February 15, 2018: Abdominal Radiology
Alexandros Charalabopoulos, Ali Kordzadeh, Elias Sdralis, Bruno Lorenzi, Fateh Ahmad
BACKGROUND: Esophagectomy in situs inversus is challenging. With long-segment supercharged reconstruction, it becomes more perplexing and multidisciplinary surgical skills are needed. Challenges met and the surgical technique used is presented in this case report. METHODS: The case of a 49-year old patient with situs inversus abdominus and a locally advanced distal esophageal adenocarcinoma extending to the stomach is presented. RESULTS: Following neoadjuvant chemotherapy and due to inability to use the stomach as a conduit, a thoracoscopic total esophagogastrectomy with long-segment reconstruction was performed...
February 13, 2018: Acta Chirurgica Belgica
Ngaire Bates, Helen Moore, Shona Matthews
No abstract text is available yet for this article.
February 2018: Journal of Medical Imaging and Radiation Oncology
Seong Ho Park, David H Kim
This article outlines how to achieve maximum accuracy in interpreting CT colonography (CTC) regarding colonic findings. Interpreting extracolonic findings seen on CTC is a separate diagnostic task and will not be addressed in this article. While many interpretive pitfalls are in fact related to CTC techniques, this article focuses on issues that are related to interpretive knowledge and skills, avoiding in-depth discussions on CTC techniques. Principal methods and further tips for detecting possible polyp candidates and for confirming true soft-tissue polyps will be discussed...
February 5, 2018: Abdominal Radiology
Abraham H Dachman, Matthew A Barish
Standardized recommended techniques for performing and reporting CT colonography (CTC) examinations were developed by a consensus of experts. Published reporting guidelines, known as the CT colonography reporting and data system supplemented by recently updated comprehensive recommendations were incorporated into the American College of Radiology (ACR) practice guidelines. The application of continuous quality improvement to the practice of CT was aided by the development of an ACR national data registry (NRDR) for CTC that addressed both process and outcome quality measures...
February 1, 2018: Abdominal Radiology
Hannes Seuss, Rolf Janka, Matthias Hammon, Alexander Cavallaro, Michael Uder, Peter Dankerl
RATIONALE AND OBJECTIVES: To evaluate two- and three-dimensional (2D and 3D) image quality of sub-milliSievert (mSv) computed tomography (CT) colonography utilizing a third-generation dual source CT scanner featuring a tin filter. METHODS: We retrospectively evaluated 26 consecutive patients who underwent third-generation dual source CT colonography, nine with the standard-dose clinical-scan protocol (SDP) and 17 with a low-dose protocol (LDP) featuring a tin filter...
January 19, 2018: Academic Radiology
Natally Horvat, Aradhna Raj, John M Ward, J Joshua Smith, Arnold J Markowitz, Marc J Gollub
OBJECTIVE: CT colonography (CTC) has been recognized as a complementary approach to evaluating the entire colon after incomplete colonoscopy (IC) in patients with occlusive colorectal cancer (CRC). The objective of this study is to evaluate changes in preoperative surgical planning after CTC is performed for patients with occlusive CRC and IC in an oncologic hospital. MATERIALS AND METHODS: This retrospective study included 65 consecutive patients with occlusive CRC who underwent CTC after IC at our institution from February 2000 to April 2016...
December 20, 2017: AJR. American Journal of Roentgenology
Gaia Peluso, Paola Incollingo, Armando Calogero, Vincenzo Tammaro, Niccolò Rupealta, Gaetano Chiacchio, Maria Laura Sandoval Sotelo, Gianluca Minieri, Antonio Pisani, Eleonora Riccio, Massimo Sabbatini, Umberto Marcello Bracale, Concetta Anna Dodaro, Nicola Carlomagno
Background: Colorectal cancer (CRC) is one of the most spread neoplasia types all around the world, especially in western areas. It evolves from precancerous lesions and adenomatous polyps, through successive genetic and epigenetic mutations. Numerous risk factors intervene in its development and they are either environmental or genetic. Aim of the Review: Alongside common screening techniques, such as fecal screening tests, endoscopic evaluation, and CT-colonography, we have identified the most important and useful biomarkers and we have analyzed their role in the diagnosis, prevention, and prognosis of CRC...
2017: BioMed Research International
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