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Radiologic Clinics of North America

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https://www.readbyqxmd.com/read/30119778/innovations-in-bowel-imaging
#1
EDITORIAL
Judy Yee
No abstract text is available yet for this article.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119777/imaging-of-the-postoperative-colon
#2
REVIEW
Eugene Huo, Laura Eisenmenger, Stefanie Weinstein
Recognition of postoperative complications is important for the immediate diagnosis and treatment needed for appropriate patient care. Identification of postoperative complications from colon surgery requires not only knowledge of the type of procedure, but also the expected normal postoperative appearance. The purpose of this article is to discuss and review the expected anatomic changes after colorectal surgery, and the appearance of the most common postoperative complications.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119776/lower-gastrointestinal-tract-applications-of-pet-computed-tomography-and-pet-mr-imaging
#3
REVIEW
Onofrio Catalano, Aoife Kilcoyne, Alberto Signore, Umar Mahmood, Bruce Rosen
This article discusses the role of PET/CT and PET/MR imaging in the evaluation of inflammatory and malignant disorders of the lower gastrointestinal tract. This includes a review of the current literature and a discussion of new and emerging research.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119775/dual-energy-computed-tomography-scans-of-the-bowel-benefits-pitfalls-and-future-directions
#4
REVIEW
Benjamin M Yeh, Markus M Obmann, Antonio C Westphalen, Michael A Ohliger, Judy Yee, Yuxin Sun, Zhen J Wang
Current computed tomography bowel imaging is challenging given the variable distension, content, and location of the bowel, the different appearance of tumors within and adjacent to bowel, and peristaltic artifacts. Published data remain sparse. Derangements in enhancement may be highlighted, image artifacts reduced, and radiation dose from multiphase scans minimized. This modality is suited for imaging bowel tumor detection and characterization, gastrointestinal bleeding, and bowel inflammation, and ischemia...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119774/imaging-workup-of-acute-and-occult-lower-gastrointestinal-bleeding
#5
REVIEW
Trevor C Morrison, Michael Wells, Jeff L Fidler, Jorge A Soto
Lower gastrointestinal bleeding is defined as occurring distal to the ligament of Treitz and presents as hematochezia, melena, or with anemia and positive fecal occult blood test. Imaging plays a pivotal role in the localization and treatment of lower gastrointestinal bleeds. Imaging tests in the workup of acute lower gastrointestinal bleeding include computed tomography (CT) angiography, nuclear medicine scintigraphy, and conventional catheter angiography. Catheter angiography can also be used to deliver treatment...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119773/mr-imaging-of-perianal-fistulas
#6
REVIEW
Kartik S Jhaveri, Seng Thipphavong, Lijun Guo, Mukesh G Harisinghani
In this article, we begin with an introduction of the perianal region anatomy, then review the definition, etiology, epidemiology, and 2 major classification systems of perianal fistulas. The role of MR imaging for assessment of perianal fistulas is mainly discussed. Finally, the medical and surgical treatment principles are reviewed.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119772/mr-imaging-of-rectal-cancer
#7
REVIEW
Natally Horvat, Iva Petkovska, Marc J Gollub
This article aims to review current concepts in the management of patients with rectal cancer, including the most common surgical techniques, anatomic landmarks with MR imaging correlation, and the role of each imaging modality in local staging, focusing on MR imaging technique and its importance in primary staging, restaging, and local recurrence.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119771/current-status-of-magnetic-resonance-colonography-for-screening-and-diagnosis-of-colorectal-cancer
#8
REVIEW
Marije P van der Paardt, Jaap Stoker
Magnetic resonance colonography with its high tissue contrast and without the use of ionizing radiation was designed as a minimally invasive screening tool for colorectal cancer and its precursors. Nonetheless, heterogeneous data on diagnostic performance and patient burden have hindered its use in screening. This article provides an overview on the status and potential of magnetic resonance colonography in the setting of detection and screening of colorectal cancer and its precursors.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119770/computed-tomography-colonography-pearls-and-pitfalls
#9
REVIEW
David H Kim, Courtney C Moreno, Perry J Pickhardt
This article serves as a practical reference to optimize the performance of computed tomography colonography in the detection of colorectal neoplasia. A specific protocol in use at 2 US university programs as well as defined interpretation strategies will be described. With this framework in place, various clinical pearls as well as pitfalls to avoid will be a major focus of this article.
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119769/low-dose-computed-tomography-colonography-technique
#10
REVIEW
Kevin J Chang, Judy Yee
Significant anxiety has been expressed by some over the radiation risks associated with computed tomography (CT), particularly when it applies to a screening examination such as CT colonography. These theoretic risks are far outweighed by the significant benefits colorectal cancer screening offers. Regardless of how significant the theoretic risk of CT radiation is in the older population, the ALARA principle maintains that radiation dose should be reduced to As Low As Reasonably Achievable. This article will discuss various strategies that may be utilized to reduce radiation dose and mitigate any increase in image noise that may occur...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119768/interdisciplinary-updates-in-crohn-s-disease-reporting-nomenclature-and-cross-sectional-disease-monitoring
#11
REVIEW
Mark E Baker, Joel G Fletcher, Mahmoud Al-Hawary, David Bruining
Computed tomography enterography and magnetic resonance enterography are essential in the evaluation and treatment of patients with Crohn's disease. As such, examination reporting must use standardized nomenclature for effective communication. This report documents an interdisciplinary consensus of the Society of Abdominal Radiology, the Society of Pediatric Radiology, and the American Gastroenterology Association on the computed tomography enterography/magnetic resonance enterography imaging findings and imaging-based morphologic phenotypes...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119767/magnetic-resonance-enterography-for-inflammatory-and-noninflammatory-conditions-of-the-small-bowel
#12
REVIEW
Gaurav Khatri, Jay Coleman, John R Leyendecker
Magnetic resonance enterography (MRE) is an effective noninvasive tool for evaluation of inflammatory and noninflammatory conditions of the small bowel. MRE allows for repeated evaluation of patients with Crohn disease without exposure to ionizing radiation, and can be used to assess disease status and direct management. MRE also allows evaluation of neoplastic and other nonneoplastic conditions of the small bowel. Adequate patient preparation and acquisition techniques are required for optimal image quality...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/30119766/computed-tomography-enterography
#13
REVIEW
Shannon P Sheedy, Amy B Kolbe, Joel G Fletcher, Jeff L Fidler
Computed tomography (CT) enterography is a noninvasive imaging modality with superb spatial and temporal resolution, specifically tailored to evaluate the small bowel. It has several advantages over other radiologic and optical imaging modalities, all of which serve as complementary investigations to one another. This article describes CTE technique, including dose reduction techniques, special considerations for the pediatric population, common technical and interpretive pitfalls, and reviews some of the more common small bowel entities seen with CTE...
September 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936954/multienergy-computed-tomography-a-new-horizon-in-computed-tomographic-imaging
#14
EDITORIAL
Savvas Nicolaou, Mohammed F Mohammed
No abstract text is available yet for this article.
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936953/dedications
#15
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936952/strategies-to-improve-image-quality-on-dual-energy-computed-tomography
#16
REVIEW
Bhavik N Patel, Daniele Marin
Dual-energy computed tomography (DECT) offers several advantages over conventional single-energy CT. These advantages include improved image quality, beam hardening correction, and metal artifact reduction. Additionally, DECT allows derivation of quantitative information through material decomposition analysis. Although newer third-generation rapid-kilovolt switching and dual-source DECT scanners have significantly improved in image quality and workflow compared with initial iterations and early scanners, sources of potential image quality degradation can exist secondary to the inherent capabilities in which the image acquisition occurs...
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936951/pearls-pitfalls-and-problems-in-dual-energy-computed-tomography-imaging-of-the-body
#17
REVIEW
Jeremy R Wortman, Aaron D Sodickson
Dual-energy computed tomography (DECT) is an exciting technology that is increasing in routine use and has the potential for significant clinical impact. With the advancement of DECT, it is important for radiologists to be aware of potential challenges with DECT acquisition and postprocessing, and to have a basic knowledge of unique artifacts and diagnostic pitfalls that can occur when interpreting DECT scans and DECT postprocessed images. This article serves as a practical overview of potential problems and diagnostic pitfalls associated with DECT, and steps that can be taken to avoid them...
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936950/dual-energy-computed-tomography-dose-reduction-series-reduction-and-contrast-load-reduction-in-dual-energy-computed-tomography
#18
REVIEW
Anushri Parakh, Francesco Macri, Dushyant Sahani
Evolution in computed tomography technology and image reconstruction have significantly changed practice. Dual energy computed tomography is being increasingly adopted owing to benefits of material separation, quantification, and improved contrast-to-noise ratio. The radiation dose can match that from single energy computed tomography. Spectral information derived from a polychromatic x-ray beam at different energies yields in image reconstructions that reduce the number of phases in a multiphasic examination and decrease the absolute amount of contrast media...
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936949/advanced-musculoskeletal-applications-of-dual-energy-computed-tomography
#19
REVIEW
William D Wong, Samad Shah, Nicolas Murray, Frances Walstra, Faisal Khosa, Savvas Nicolaou
Dual-energy CT (DECT) is a rapidly growing tool in musculoskeletal radiology. It has been validated as an accurate imaging modality for the assessment of gout and bone marrow edema. DECT can be used to reduce metal artifacts. A few studies have shown its ability to calculate bone mineral density and examine pathologic states in tendons and ligaments. Its capacity for material separation suggests its emergence as a technique for arthrography, and for the evaluation of intervertebral discs and other inflammatory arthropathies...
July 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29936948/the-role-of-dual-energy-computed-tomography-in-assessment-of-abdominal-oncology-and-beyond
#20
REVIEW
Desiree E Morgan
The added value and strength of dual energy computed tomography for the evaluation of oncologic patients revolve around the use of lower energy reconstructed images and iodine material density images. Lower keV simulated monoenergetic images optimize soft tissue tumor to nontumoral attenuation differences and increase contrast to noise ratios to improve lesion detection. Iodine material density images or maps are helpful from a qualitative standpoint for image interpretation because they result in improved detection and characterization of tumors and lymph node involvement, and from a quantitative assessment by enabling interrogation of specific properties of tissues to predict and assess therapeutic response...
July 2018: Radiologic Clinics of North America
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