Imaging Techniques

2018 ◽  
pp. 75-88
Author(s):  
Daniel C. O’Brien ◽  
Junjuian Huang ◽  
Scott A. Resnick
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Multidetector Ct ◽  
Imaging Techniques ◽  
Cone Beam Ct ◽  
Digital Subtraction ◽  
Interventional Radiologist ◽  
Multidetector Ct Angiography

Minimally invasive interventional radiographic procedures rely on many of the same imaging techniques as are used in diagnostic studies. This chapter describes the imaging modalities most commonly utilized by the interventional radiologist intraprocedurally. These include fluoroscopy, digital subtraction angiography (DSA), sonographic techniques for percutaneous interventions and intravascular ultrasound, and computed tomography (CT) and cone beam CT (CBCT). Imaging techniques used adjunctively in the procedure planning and follow-up phases are also briefly reviewed, including multidetector CT angiography, magnetic resonance angiography (MRA), and sonographic vascular evaluation. Specific interventions are mentioned throughout as a means of illustrating the clinical utilities of these imaging techniques, although specific procedural considerations are discussed more thoroughly elsewhere.

scholarly journals Cost-Effectiveness of Magnetic Resonance Angiography Versus Intra-arterial Digital Subtraction Angiography to Follow-Up Patients With Coiled Intracranial Aneurysms

Stroke ◽  
2010 ◽  
Vol 41 (8) ◽  
pp. 1736-1742 ◽  
Author(s):  
Joanna D. Schaafsma ◽  
Hendrik Koffijberg ◽  
Erik Buskens ◽  
Birgitta K. Velthuis ◽  
Yolanda van der Graaf ◽  
...  
Keyword(s):  
Cost Effectiveness ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Digital Subtraction Angiography ◽  
Intracranial Aneurysms ◽  
Digital Subtraction

Current Modalities for Imaging the Vascular System

2011 ◽  
Author(s):  
Aoife N. Keeling ◽  
Peter A. Naughton
Keyword(s):  
Computed Tomography ◽  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Vascular System ◽  
Imaging Techniques ◽  
Noninvasive Imaging ◽  
Clinical Applications ◽  
Technical Factors ◽  
Venous Disorders ◽  
Case Based

This review focuses on the noninvasive imaging modalities currently used in the investigation and diagnosis of both arterial and venous disorders, covering both technical factors and clinical applications with a number of case-based examples. Over the last two decades, the most frequent noninvasive imaging techniques used to diagnose and treat vascular pathologies have been duplex ultrasonography, computed tomography, and magnetic resonance angiography. Multidetector computed tomograpic angiography is also described. More than three dozen pictures depict various imaging techniques of patients. This review contains 70 references.

The Supraclavicular Artery Perforator Flap: A Comparative Study of Imaging Techniques Used in Preoperative Mapping

2018 ◽  
Vol 34 (07) ◽  
pp. 499-508 ◽  
Author(s):  
Kawa Mahmood ◽  
Nzar Hamawandi ◽  
Aram Mirza ◽  
Jawad Hawas ◽  
Esther Moreno ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Indocyanine Green ◽  
Digital Subtraction Angiography ◽  
Computerized Tomography ◽  
Indocyanine Green Angiography ◽  
Imaging Techniques ◽  
Digital Subtraction ◽  
Computerized Tomography Angiography ◽  
Preoperative Mapping

Background The supraclavicular artery flap is an excellent flap for head and neck reconstruction. The aim of this study is to assess imaging techniques to define the precise vascular boundaries of this flap. Methods Six imaging techniques were used for supraclavicular artery mapping in 65 cases; handheld Doppler, triplex ultrasound, computed tomography angiography, magnetic resonance angiography, digital subtraction angiography, and indocyanine green angiography. We checked the site of the perforators, the course of a supraclavicular artery, and anatomical mapping of the supraclavicular artery. Results Handheld Doppler identified perforators' sites in 80% of the cases but showed no results for the course of the vessel. Triplex ultrasound identified the site of perforators in 52.9%, and partial mapping of the course of a supraclavicular artery in 64.7% of the cases. Computerized tomography angiography showed the site of perforators in 60%, and the course of supraclavicular artery completely in 45%, and partially in an additional 30%of the cases examined. Magnetic resonance angiography showed negative results for all parameters. Digital subtraction angiography showed the partial course of a supraclavicular artery in 62.5%, but showed no perforators. Indocyanine green angiography showed the site of perforators in 60% and a partial course of supraclavicular artery distal to perforators in 60%.Anatomical mapping of the vessel was possible with computerized tomography angiogram completely in 45%, and partially in 30%, and was also possible with indocyanine green angiography partially in 60%. Conclusion Computerized tomography angiography showed best results in the mapping of the supraclavicular artery, but with an inability to define the perforator perfusion territories, and also with risks of irradiation, while indocyanine green angiography is a good alternative as it could precisely map the superficial course of the artery and angiosomes, with no radiation exposure.

scholarly journals The use of contrast-enhanced, time-resolved magnetic resonance angiography in cerebrovascular pathology

2019 ◽  
Vol 47 (6) ◽  
pp. E3 ◽  
Author(s):  
Jonathan A. Grossberg ◽  
Brian M. Howard ◽  
Amit M. Saindane
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Best Practices ◽  
Imaging Modality ◽  
Digital Subtraction ◽  
Time Resolved ◽  
Contrast Enhanced ◽  
Contrast Allergy

Digital subtraction angiography (DSA) has long been the imaging gold standard in the evaluation, treatment, and follow-up of cerebro- and spinovascular disorders. However, DSA has the disadvantages of invasiveness, contrast allergy or nephropathy, the impracticality of procedural preparation and recovery, and expense. Contrast-enhanced (CE), time-resolved (TR) magnetic resonance angiography (CE TR-MRA) is a sophisticated, relatively novel imaging modality that provides multiphasic contrast-enhanced visualization of the neurovasculature. Given the crucial role of angiography in all aspects of care for patients with complex neurovascular disorders, it is incumbent on those who care for these patients to understand the usefulness and pitfalls of novel imaging in this arena to ensure best practices, and to deliver cutting edge care to these patients in a way that minimizes cost, but does not compromise quality. CE TR-MRA has the potential to play an expanded role in the workup and follow-up across the spectrum of neurovascular disease, and this review is aimed to help neurosurgeons better understand how CE TR-MRA can be used to better manage patients in this cohort.

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