scholarly journals Magnetic Resonance Angiography Using Fresh Blood Imaging in Oral and Maxillofacial Regions

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Masafumi Oda ◽  
Tatsurou Tanaka ◽  
Shinji Kito ◽  
Manabu Habu ◽  
Masaaki Kodama ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Clinical Significance ◽  
Clinical Applications ◽  
Fresh Blood ◽  
General Dentists ◽  
Blood Imaging ◽  
Oral And Maxillofacial Regions ◽  
Mr Sequences

The present paper provides general dentists with an introduction to the clinical applications and significance of magnetic resonance angiography (MRA) in the oral and maxillofacial regions. Specifically, the method and characteristics of MRA are first explained using the relevant MR sequences. Next, clinical applications to the oral and maxillofacial regions, such as identification of hemangiomas and surrounding vessels by MRA, are discussed. Moreover, the clinical significance of MRA for other regions is presented to elucidate future clinical applications of MRA in the oral and maxillofacial regions.

Angiography for Diagnosing Peripheral Arterial Occlusive Disease – A Technical, Clinical and Cost Comparison of Contrast-enhanced Magnetic Resonance Angiography and Unenhanced Magnetic Resonance Imaging Techniques with a Focus on Fresh Blood Imaging

2010 ◽  
Vol 6 (2) ◽  
pp. 54
Author(s):  
Carsten Schwenke ◽  
Monica Boos ◽  
Rainer Hentrich ◽  
Michael Blankenburg ◽  
Martin Rohrer ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Contrast Agent ◽  
Peripheral Arterial Occlusive Disease ◽  
Arterial Occlusive Disease ◽  
Occlusive Disease ◽  
Fresh Blood ◽  
Contrast Enhanced ◽  
Peripheral Arterial ◽  
Blood Imaging

This study compares the clinical and technical utility of non-contrast-enhanced magnetic resonance angiography (nce-MRA) and contrastenhanced MRA (ce-MRA) in a mini-review of patients with suspected peripheral arterial occlusive disease (PAOD) in whom both MRA approaches were indicated. It also looks at the costs of angiography for diagnosing peripheral arterial occlusive disease using either ce-MRA or nce-MRA in comparison with the example of fresh blood imaging (FBI). The costs for MRA were taken from a previous cost study and those for nce-MRA/FBI from published data and appropriate calculations. The average total investigation costs for ce-MRA were found to be €205, including €59 for consumables, mainly originating from the contrast agent costs (according to German list prices for 2009). On the other hand, for nce-MRA, average total costs ranged from €190 to €239, depending on the acquisition time (12–32 minutes), and a larger number of additional diagnostic investigations were found. Irrespective of costs, several clinical and technical benefits such as image quality, higher robustness and the absence of limitations with complex vessel courses favoured ce-MRA. The consequences of using ce-MRA were fewer technical failures and, therefore, a higher throughput of patients indicated for contrast agent use in the radiology department; this led to more procedures per day and, therefore, more efficient use of diagnostic imaging resources.

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.

scholarly journals Clinical significance of centripetal propagation of vasoconstriction in patients with reversible cerebral vasoconstriction syndrome: A retrospective case-control study

Cephalalgia ◽  
2018 ◽  
Vol 38 (12) ◽  
pp. 1864-1875 ◽  
Author(s):  
Masami Shimoda ◽  
Shinri Oda ◽  
Hideaki Shigematsu ◽  
Kaori Hoshikawa ◽  
Masaaki Imai ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Angiography ◽  
Clinical Significance ◽  
Thunderclap Headache ◽  
Reversible Cerebral Vasoconstriction Syndrome ◽  
Retrospective Case ◽  
Cerebral Vasoconstriction ◽  
Increased Risk ◽  
Before And After ◽  
Control Study

Introduction We previously reported centripetal propagation of vasoconstriction at the time of thunderclap headache remission in patients with reversible cerebral vasoconstriction syndrome. Here we examine the clinical significance of centripetal propagation of vasoconstriction. Methods Participants comprised 48 patients who underwent magnetic resonance angiography within 72 h of reversible cerebral vasoconstriction syndrome onset and within 48 h of thunderclap headache remission. Results In 24 of the 48 patients (50%), centripetal propagation of vasoconstriction occurred on magnetic resonance angiography at the time of thunderclap headache remission. The interval from first to last thunderclap headache in patients with centripetal propagation of vasoconstriction (14 ± 10 days) was significantly longer than that of patients without centripetal propagation of vasoconstriction (4 ± 2 days). In the patients with centripetal propagation of vasoconstriction at the time of thunderclap headache remission, the incidence of another cerebral lesion (38%, 9 of 24 cases) was significantly higher than in patients without centripetal propagation of vasoconstriction (0%). From findings of sequential magnetic resonance angiography before and after thunderclap headache remission, we observed tendencies in which centripetal propagation of vasoconstriction gradually progressed after the onset of reversible cerebral vasoconstriction syndrome and peaked at the time of thunderclap headache remission. The progress of centripetal propagation of vasoconstriction concluded with thunderclap headache remission. Conclusions Centripetal propagation of vasoconstriction has clinical significance as an indicator of the severity of reversible cerebral vasoconstriction syndrome. The presence of centripetal propagation of vasoconstriction is associated with an increased risk of brain lesions and a longer interval from first to last thunderclap headache. Moreover, repeat magnetic resonance angiography to assess centripetal propagation of vasoconstriction during the time from onset to thunderclap headache remission can help diagnose reversible cerebral vasoconstriction syndrome.

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