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CT Colonography

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https://www.readbyqxmd.com/read/29761359/ct-colonography-size-reduction-of-submerged-colorectal-polyps-due-to-electronic-cleansing-and-ct-window-settings
#1
Christian Bräuer, Philippe Lefere, Stefaan Gryspeerdt, Helmut Ringl, Ali Al-Mukhtar, Paul Apfaltrer, Dominik Berzaczy, Barbara Füger, Julia Furtner, Christina Müller-Mang, Matthias Pones, Martina Scharitzer, Ramona Woitek, Anno Graser, Michael Weber, Thomas Mang
OBJECTIVES: To assess whether electronic cleansing (EC) of tagged residue and different computed tomography (CT) windows influence the size of colorectal polyps in CT colonography (CTC). METHODS: A database of 894 colonoscopy-validated CTC datasets of a low-prevalence cohort was retrospectively reviewed to identify patients with polyps ≥6 mm that were entirely submerged in tagged residue. Ten radiologists independently measured the largest diameter of each polyp, two-dimensionally, before and after EC in colon, bone, and soft-tissue-windows, in randomised order...
May 14, 2018: European Radiology
https://www.readbyqxmd.com/read/29724427/acr-appropriateness-criteria-%C3%A2-colorectal-cancer-screening
#2
Courtney Moreno, David H Kim, Twyla B Bartel, Brooks D Cash, Kevin J Chang, Barry W Feig, Kathryn J Fowler, Evelyn M Garcia, Avinash R Kambadakone, Drew L Lambert, Angela D Levy, Daniele Marin, Christine M Peterson, Christopher D Scheirey, Martin P Smith, Stefanie Weinstein, Laura R Carucci
This review summarizes the relevant literature regarding colorectal screening with imaging. For individuals at average or moderate risk for colorectal cancer, CT colonography is usually appropriate for colorectal cancer screening. After positive results on a fecal occult blood test or immunohistochemical test, CT colonography is usually appropriate for colorectal cancer detection. For individuals at high risk for colorectal cancer (eg, hereditary nonpolyposis colorectal cancer, ulcerative colitis, or Crohn colitis), optical colonoscopy is preferred because of its ability to obtain biopsies to detect dysplasia...
May 2018: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29667892/ct-colonography-performance-for-the-detection-of-polyps-and-cancer-in-adults-%C3%A2-65-years-old-systematic-review-and-meta-analysis
#3
Perry J Pickhardt, Loredana Correale, Silvia Delsanto, Daniele Regge, Cesare Hassan
OBJECTIVE: We sought to perform a systematic review and meta-analysis of published CT colonography (CTC) studies assessing lesion detection in senior-age (≥ 65 years old) cohorts. MATERIALS AND METHODS: We conducted a systematic review of CTC studies published between January 1994 and August 2017 containing data on senior-age adults. The primary endpoint was the CTC-positive rate for large colorectal polyps (≥ 10 mm) and masses. Secondary endpoints included lesions ≥ 6 mm, proven advanced neoplasia, and colorectal cancer (CRC)...
April 18, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29644509/applications-of-colon-capsule-endoscopy
#4
REVIEW
Shabana F Pasha
PURPOSE OF REVIEW: This is a review of colon capsule endoscopy (CCE) with a focus on its recent developments, technological improvements, and current and potential future indications. RECENT FINDINGS: Based on the current literature, CCE II demonstrates comparable polyp detection rates as optical colonoscopy and CT colonography, and improved cost-effectiveness. The main limitation to patient acceptance is the requirement of a rigorous bowel preparation. Preliminary studies show good correlation between CCE and optical colonoscopy for assessment of colonic disease activity in inflammatory bowel disease (IBD)...
April 12, 2018: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/29572136/addressing-racial-disparity-in-colorectal-cancer-screening-with-ct-colonography-experience-in-an-african-american-cohort
#5
Courtney C Moreno, Todd F Fibus, Elizabeth A Krupinski, David H Kim, Perry J Pickhardt
BACKGROUND: Incidence and mortality from colorectal cancer (CRC) are higher among African Americans where CRC screening rates lag behind non-Hispanic whites. The purpose of this investigation was to evaluate CT colonography (CTC) performance and outcome measures in an African-American cohort. MATERIALS AND METHODS: This study is an institutional review board-approved and Health Insurance Portability and Accountability Act-compliant study. Retrospective evaluation of the African-American cohort from the Atlanta VA Medical Center (Decatur, Georgia) CTC screening program...
February 20, 2018: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/29566994/volumetric-textural-analysis-of-colorectal-masses-at-ct-colonography-differentiating-benign-versus-malignant-pathology-and-comparison-with-human-reader-performance
#6
B Dustin Pooler, Meghan G Lubner, Jake R Theis, Richard B Halberg, Zhengrong Liang, Perry J Pickhardt
RATIONALE AND OBJECTIVES: To (1) apply a quantitative volumetric textural analysis (VTA) to colorectal masses at CT colonography (CTC) for the differentiation of malignant and benign lesions and to (2) compare VTA with human performance. MATERIALS AND METHODS: A validated, quantitative VTA method was applied to 63 pathologically proven colorectal masses (mean size, 4.2 cm; range, 3-8 cm) at noncontrast CTC in 59 adults (mean age, 66.5 years; range, 45.9-91.6 years)...
March 19, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29557216/fully-automated-segmentation-and-quantification-of-visceral-and-subcutaneous-fat-at-abdominal-ct-application-to-a-longitudinal-adult-screening-cohort
#7
Scott J Lee, Jianmin Liu, Jianhua Yao, Andrew Kanarek, Ronald M Summers, Perry J Pickhardt
OBJECTIVE: To investigate a fully-automated CT-based adiposity tool, applying it to a longitudinal adult screening cohort. METHODS: A validated automated adipose tissue segmentation algorithm was applied to non-contrast abdominal CT scans in 8852 consecutive asymptomatic adults (mean age, 57.1 years; 3926M/4926F) undergoing colonography screening. The tool was also applied to follow-up CT scans in a subset of 1584 individuals undergoing longitudinal surveillance (mean interval, 5...
March 20, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29516105/ct-colonography-over-two-decades-from-discovery-to-practice
#8
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 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29492185/dolichocolon-revisited-an-inborn-anatomic-variant-with-redundancies-causing-constipation-and-volvulus
#9
REVIEW
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
https://www.readbyqxmd.com/read/29491380/accuracy-of-combined-computed-tomography-colonography-and-dual-energy-iiodine-map-imaging-for-detecting-colorectal-masses-using-high-pitch-dual-source-ct
#10
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
https://www.readbyqxmd.com/read/29487748/factors-associated-with-pericolic-fat-stranding-of-colon-cancer-on-computed-tomography-colonography
#11
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
https://www.readbyqxmd.com/read/29485322/colorectal-cancer-cost-effectiveness-of-colonoscopy-versus-ct-colonography-screening-with-participation-rates-and-costs
#12
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
https://www.readbyqxmd.com/read/29484051/colonic-angiodysplasia-on-ct-colonography-case-report-and-characteristic-imaging-findings
#13
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
https://www.readbyqxmd.com/read/29477264/patient-knowledge-regarding-colorectal-cancer-risk-opinion-of-screening-and-preferences-for-a-screening-test
#14
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
https://www.readbyqxmd.com/read/29472116/post-imaging-colorectal-cancer-or-interval-cancer-rates-after-ct-colonography-a-systematic-review-and-meta-analysis
#15
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...
May 2018: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29472115/ct-colonography-provides-new-insights-into-interval-cancers
#16
COMMENT
Perry J Pickhardt
No abstract text is available yet for this article.
May 2018: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29461954/is-ct-colonography-better-tolerated-than-flexible-sigmoidoscopy-for-colorectal-cancer-screening
#17
COMMENT
Stuart A Taylor, Christian von Wagner
No abstract text is available yet for this article.
March 2018: Radiology
https://www.readbyqxmd.com/read/29460039/ct-colonography-the-ideal-colorectal-cancer-screening-test
#18
David H Kim
No abstract text is available yet for this article.
March 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29450613/extracolonic-findings-and-radiation-at-ct-colonography-what-the-referring-provider-needs-to-know
#19
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...
March 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29450610/ctc-technique-methods-to-ensure-an-optimal-exam
#20
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...
March 2018: Abdominal Radiology
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