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Magnetic Resonance Imaging Clinics of North America

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https://www.readbyqxmd.com/read/29128010/advanced-imaging-in-head-and-neck-tumors
#1
EDITORIAL
Girish M Fatterpekar
No abstract text is available yet for this article.
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128009/foreword
#2
EDITORIAL
Suresh K Mukherji
No abstract text is available yet for this article.
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128008/practical-tips-for-mr-imaging-of-perineural-tumor-spread
#3
REVIEW
Claudia F E Kirsch, Ilona M Schmalfuss
Perineural tumor spread (PNS) substantially alters a patient's prognosis and treatment plan. Therefore, it is critical that the radiologists are familiar with the course of cranial nerves commonly affected by PNS and the neuronal connections to appropriately map the extent of PNS. Limited involvement of a nerve by PNS might be resectable, whereas advanced PNS may require radiation therapy.
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128007/computed-tomography-versus-magnetic-resonance-in-head-and-neck-cancer-when-to-use-what-and-image-optimization-strategies
#4
REVIEW
Amy Juliano, Gul Moonis
This article provides a practical overview of head and neck cancers, outlining an approach to evaluating these lesions and optimizing imaging strategies. Recognition of key anatomic landmarks as suggested by American Joint Committee on Cancer (AJCC) tumor, node, metastasis (TNM) criteria is emphasized. Further, the recently updated eighth edition of the AJCC staging manual has introduced some modifications that influence the TNM staging. These modifications are discussed throughout the article to provide an updated review on head and neck cancer...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128006/neck-imaging-reporting-and-data-system
#5
REVIEW
Ashley H Aiken, Patricia A Hudgins
The Neck Imaging Reporting and Data System (NI-RADS) is a practical and clinically useful imaging surveillance template designed to guide appropriate imaging follow-up and next-management steps. This article is a practical guide for using NI-RADS to reduce report-generation time for radiologists and create useful reports for referring clinicians and patients. A review of the report template and legend is followed by a case-based and pictorial review of the proper assignment of NI-RADS categories.
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128005/pet-computed-tomography-in-head-and-neck-cancer-current-evidence-and-future-directions
#6
REVIEW
Yin Jie Chen, Tanya Rath, Suyash Mohan
Head and neck cancers are among the most common cancers worldwide. More than 90% to 95% are squamous cell carcinomas (SCCs). Accurate staging at diagnosis optimizes treatment planning with improved outcomes. Recently, 18F-fluorodeoxyglucose (FDG) PET-computed tomography (CT) has shown tremendous value at diagnosis for accurate staging, treatment planning, and prognostication; and after definitive therapy for assessing response and long-term surveillance. Novel non-FDG PET tracers are under investigation, which have great potential for improving patient care in this era of personalized medicine...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128004/perfusion-and-permeability-imaging-for-head-and-neck-cancer-theory-acquisition-postprocessing-and-relevance-to-clinical-imaging
#7
REVIEW
Adam J Davis, Razia Rehmani, Ashok Srinivasan, Girish M Fatterpekar
Perfusion and permeability computed tomography and MR imaging applied to head and neck cancer provide powerful diagnostic and prognostic tools for clinicians. Understanding the basics of these techniques allows the radiologist to make informed decisions regarding the use of modeling algorithms, acquisition parameters, and postprocessing techniques. This helps to ensure that studies are acquired, analyzed, and reported appropriately and erroneous results are avoided. These techniques are highly automated, widely available, and can be easily and safely incorporated into daily imaging workflow...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128003/pet-mr-imaging-in-head-and-neck-cancer-current-applications-and-future-directions
#8
REVIEW
Samuel J Galgano, Ryan V Marshall, Erik H Middlebrooks, Jonathan E McConathy, Pradeep Bhambhvani
Clinical PET/MR imaging is being implemented at institutions worldwide as part of the standard-of-care imaging for select oncology patients. This article focuses on oncologic applications of PET/MR imaging in cancers of the head and neck. Although current published literature is relatively sparse, the potential benefits of a hybrid modality of PET/MR imaging are discussed along with several possible areas of research. With the increasing number of PET/MR imaging scanners in clinical use and ongoing research, the role of PET/MR imaging in the management of head and neck cancer is likely to become more evident in the near future...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128002/update-in-parathyroid-imaging
#9
REVIEW
Samuel J Kuzminski, Julie A Sosa, Jenny K Hoang
Primary hyperparathyroidism (PHPT) is characterized by excessive, dysregulated production of parathyroid hormone (PTH) by 1 or more abnormal parathyroid glands. Minimally invasive surgical techniques have created a need for more precise localization of the parathyroid lesion by imaging. A variety of imaging protocols and techniques have been used for this purpose, but no one modality is clearly superior. Nuclear medicine scintigraphy and ultrasound imaging are established modalities, although multiphase or 4-dimensional computed tomography is an emerging modality with several advantages...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128001/dynamic-contrast-enhanced-mr-imaging-in-head-and-neck-cancer
#10
REVIEW
Suraj J Kabadi, Girish M Fatterpekar, Yoshimi Anzai, Jonathan Mogen, Mari Hagiwara, Sohil H Patel
Dynamic contrast-enhanced (DCE) MR imaging uses rapid sequential MR image acquisition before, during, and after intravenous contrast administration to elucidate information on the microvascular biologic function of tissues. The derived pharmacokinetic parameters provide useful information on tissue perfusion and permeability that may help to evaluate entities that otherwise appear similar by conventional imaging. When specifically applied to the evaluation of head and neck cancer, DCE-MR imaging may provide valuable information to help predict treatment response, discriminate between posttreatment changes and residual tumor, and discriminate between various head and neck neoplasms...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29128000/diffusion-weighted-imaging-in-head-and-neck-cancer-technique-limitations-and-applications
#11
REVIEW
Michael Connolly, Ashok Srinivasan
Diffusion-weighted imaging (DWI) of the head and neck represents a distinct method of MR imaging with far-ranging applications. Research continues to hone the capabilities of DWI in characterization, prediction, monitoring, assessing response to treatment, and detecting posttreatment changes and recurrent tumors. Pretreatment apparent diffusion coefficient (ADC) values can suggest the likelihood of response to treatment. DWI-obtained ADC values are able to look beyond the anatomy in posttreatment tumor beds and metastatic lymph nodes to evaluate for tumor recurrence...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29127999/high-resolution-isotropic-three-dimensional-mr-imaging-of-the-extraforaminal-segments-of-the-cranial-nerves
#12
REVIEW
Jessica Wen, Naman S Desai, Dean Jeffery, Nafi Aygun, Ari Blitz
High-resolution isotropic 3-dimensional (D) MR imaging with and without contrast is now routinely used for imaging evaluation of cranial nerve anatomy and pathologic conditions. The anatomic details of the extraforaminal segments are well-visualized on these techniques. A wide range of pathologic entities may cause enhancement or displacement of the nerve, which is now visible to an extent not available on standard 2D imaging. This article highlights the anatomy of extraforaminal segments of the cranial nerves and uses select cases to illustrate the utility and power of these sequences, with a focus on constructive interference in steady-state...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/29127998/spectral-computed-tomography-technique-and-applications-for-head-and-neck-cancer
#13
REVIEW
Almudena Pérez-Lara, Reza Forghani
Spectral computed tomography (CT) or dual-energy CT (DECT) is an advanced form of CT with increasing applications in head and neck radiology. This article provides an overview of the DECT technique and reviews current applications for the evaluation of neck pathology, focusing on oncologic applications. Included are an overview of the basic underlying principles and approaches for DECT scan acquisition and material characterization; a discussion of various DECT reconstructions and a brief overview of practical issues pertaining to DECT implementation, including those related to workflow impact of DECT; and a discussion of various applications of DECT for the evaluation of the neck, especially in oncology...
February 2018: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964470/update-on-imaging-contrast-agents
#14
EDITORIAL
Carlos A Zamora, Mauricio Castillo
No abstract text is available yet for this article.
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964469/foreword
#15
EDITORIAL
Suresh K Mukherji
No abstract text is available yet for this article.
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964468/safety-of-contrast-material-use-during-pregnancy-and-lactation
#16
REVIEW
Paulo Puac, Andrés Rodríguez, Carina Vallejo, Carlos A Zamora, Mauricio Castillo
The use of contrast media to image patients who are pregnant has increased during the past decades worldwide. Their use in pregnancy and in patients who are lactating remains a challenging issue for radiologists and other physicians. This article addresses the different types of contrast media that may be used in such patients according to the imaging modality (iodinated contrast media, barium, gadolinium-based, and ultrasound contrast agents), focusing on their adverse effects, potential teratogenic effects, strategies to minimize risks, and current clinical recommendation...
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964467/safety-of-contrast-material-use-in-children
#17
REVIEW
Bruno P Soares, Maarten H Lequin, Thierry A G M Huisman
Iodinated and gadolinium-based contrast materials have excellent safety profiles for use in pediatric computed tomography and MR imaging. The rate of acute adverse reactions and contrast-induced nephropathy is lower than in adults. The relationship between nephrogenic systemic fibrosis and gadolinium administration is well established and only a small number of children suffer from this debilitating disorder. The recent finding of gadolinium deposition in the brain of patients with normal renal function has renewed concerns regarding its long-term toxicity...
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964466/gadolinium-deposition-and-chronic-toxicity
#18
REVIEW
Joana Ramalho, Miguel Ramalho
Clinicians, radiologists, and patients should be aware of the most up-to-date data on the risks of gadolinium-based contrast agent (GBCA) administration. In this review, we discuss in vivo gadolinium retention, particularly brain tissue retention, and potential toxic effects. GBCA pharmacokinetics and biodistribution are reviewed briefly. Based on the more recent published literature and society guidelines, general safety recommendations for clinical practice are provided.
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964465/gadolinium-based-contrast-agents-associated-adverse-reactions
#19
REVIEW
Miguel Ramalho, Joana Ramalho
Gadolinium-based contrast agents have been considered extremely safe drugs with a low incidence of acute adverse reactions. Most of the reactions are mild and physiologic. However, despite being extremely rare, acute severe adverse reactions, including anaphylaxis, may occur. In this article adverse reactions are discussed with regard to their classification, pathophysiology, symptoms, and risk factors.
November 2017: Magnetic Resonance Imaging Clinics of North America
https://www.readbyqxmd.com/read/28964464/contrast-induced-acute-kidney-injury-pathophysiology-manifestations-prevention-and-management
#20
REVIEW
Travis Scharnweber, Lea Alhilali, Saeed Fakhran
Contrast-induced acute kidney injury is a phenomenon that has been extensively studied throughout the years. There is a large volume of literature documenting this risk, and most radiology departments and radiologists use this information when making decisions regarding contrast administration. A review of the current information on the topic of contrast-induced acute kidney injury is necessary to ensure that the risks of intravenous contrast are properly weighed against the benefits of a contrast-enhanced computed tomography scan...
November 2017: Magnetic Resonance Imaging Clinics of North America
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