scholarly journals Usefulness of Lower Extremity Magnetic Resonance Venography with Two-dimensional Spiral Gradient Echo Sequence and Effect of Patient Positioning on the Visualization of Lower Extremity Veins

2012 ◽  
Vol 68 (7) ◽  
pp. 841-850
Author(s):  
Makoto Watanabe
Keyword(s):  
Magnetic Resonance ◽  
Lower Extremity ◽  
Patient Positioning ◽  
Magnetic Resonance Venography ◽  
Two Dimensional ◽  
Gradient Echo ◽  
Extremity Veins

A Novel Scoring System for Lower-extremity Venous Pathology Analysed Using Magnetic Resonance Venography and Duplex Ultrasound

2012 ◽  
Vol 27 (1_suppl) ◽  
pp. 163-170 ◽  
Author(s):  
C W K P Arnoldussen ◽  
I Toonder ◽  
C H A Wittens
Keyword(s):  
Magnetic Resonance ◽  
Lower Extremity ◽  
Scoring System ◽  
Imaging Techniques ◽  
Vena Cava ◽  
Duplex Ultrasound ◽  
Venous System ◽  
Magnetic Resonance Venography ◽  
Chronic Venous Disease ◽  
Venous Disease

Objectives: To present a novel scoring system for lower-extremity venous pathology (the LOVE score) and our experiences using it in our clinical practice to identify venous pathology with duplex ultrasound (DUS) and magnetic resonance venography (MRV). Method: A total of 40 patients, 30 suspected of chronic venous disease and 10 with acute deep vein thrombosis (DVT) were examined from the inferior vena cava (IVC) to the popliteal vein using DUS and MRV. The image findings were reported using the LOVE score. Results The majority of deep veins (368 out of 378 segments) were completely visualized by both our imaging techniques and could be analysed using the LOVE score. Both imaging techniques reported comparable findings with regard to the visualization of thrombus, obstruction, collaterals, trabeculations, anatomic variations and central venous compression (e.g. May–Thurner). Conclusions: The LOVE score can be used to expand and standardize the documentation of imaging the deep venous system beyond thrombosis, to help identify (optimal) treatment options in patients with venous disease, in both the clinical and research setting. This first assessment shows that both DUS and MRV are capable of systematically identifying a multitude of changes in the venous system.

Value of magnetic resonance venography and computed tomographic venography in lower extremity chronic venous disease

2013 ◽  
Vol 28 (1_suppl) ◽  
pp. 169-175 ◽  
Author(s):  
C W K P Arnoldussen ◽  
R De Graaf ◽  
C H A Wittens ◽  
M W De Haan
Keyword(s):  
Magnetic Resonance ◽  
Lower Extremity ◽  
Treatment Options ◽  
Vena Cava ◽  
Duplex Ultrasound ◽  
Magnetic Resonance Venography ◽  
Chronic Venous Disease ◽  
Venous Disease ◽  
Computed Tomographic ◽  
Computed Tomographic Venography

For the treatment of chronic venous disease (CVD) of the lower extremity, identification of the underlying venous pathologies is essential. Traditionally, the pathologies to detect with imaging have been centred on insufficiency and reflux of the superficial, perforator and deep veins of the leg. More recently, stenosis and obstruction of the deep veins of the pelvis and abdomen (i.e. inferior vena cava, common and external iliac veins) have been identified as significant underlying pathologies in CVD. Accurate detection of stenotic and/or occlusive venous disease expands the treatment options for patients with CVD. In most cases, imaging of venous disease is performed with duplex ultrasound. In this article we discuss the existing evidence and potential value of computed tomographic venography and magnetic resonance venography to contribute in accurately identifying chronic venous disease, in particular chronic venous obstruction.

Magnetic resonance imaging of hyaline cartilage defects at 1.5T and 3.0T: comparison of medium T2‐weighted fast spin echo, T1‐weighted two‐dimensional and three‐dimensional gradient echo pulse sequences

2005 ◽  
Vol 46 (1) ◽  
pp. 67-73 ◽  
Author(s):  
F. Fischbach ◽  
H. Bruhn ◽  
F. Unterhauser ◽  
J. Ricke ◽  
G. Wieners ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Hyaline Cartilage ◽  
Spin Echo ◽  
Three Dimensional ◽  
Fast Spin Echo ◽  
Two Dimensional ◽  
Gradient Echo ◽  
Lesion Detectability ◽  
Fast Spin ◽  
Field Strengths

Purpose: To evaluate and compare the diagnostic accuracy of appropriate magnetic resonance (MR) sequences in the detection of cartilage lesions at 1.5T and 3.0T. Material and Methods: Twelve chondral defects of varying depths, widths, and locations were created in the retropatellar hyaline cartilage in six sheep cadaver limbs. Axial images employing three fat‐suppressed imaging sequences – (1) a T2‐weighted fast spin‐echo (FSE) sequence, (2) a two‐dimensional (2D) and (3) three‐dimensional (3D) gradient‐echo (GE) sequence at 1.5T and 3.0T using an extremity quadrature coil – were evaluated by three experienced radiologists. Statistical analysis of the results consisted of receiver operating characteristics (ROC) and significant testing using the bivariate chi‐square test. In addition, signal‐to‐noise ratios (SNR) and contrast‐to‐noise ratios (CNR) were evaluated with significance testing using the Wilcoxon test. Results: The 3D GE sequence compared favorably with other sequences at 3.0T and 1.5T (Az = 0.88 at 3.0T and Az = 0.85 at 1.5T) missing only one small grade 2 lesion. 2D GE imaging was inferior to 3D imaging at both field strengths ( P<0.05) in general. However, compared to 1.5T, lesion detectability was improved at the higher magnetic field of 3.0T (Az = 0.81 and 0.73 at 3.0T and 1.5T, respectively). FSE images showed significantly inferior sensitivity and less anatomical detail compared to the GE sequences at both field strengths (Az = 0.64 and 0.72 at 3.0T and 1.5T, respectively; P<0.05). However, compared to 1.5T, lesion detectability SNR and CNR values were superior in all sequences tested at 3.0T. Conclusion: MRI at 3.0T improves SNR and CNR significantly in the most common sequences for cartilage MRI, resulting in an improvement in chondral lesion detection. GE imaging therefore allows resolution to be increased in an acceptable time manner for patient comfort, and the 3D GE fat‐suppressed sequence at 3.0T appears to be best suited for cartilage imaging in a clinical setting.

Confirmation of t1-bright vein of galen aneurysm spontaneous thrombosis by subtraction magnetic resonance venography: a case report

2009 ◽  
Vol 50 (7) ◽  
pp. 812-815
Author(s):  
M. Irfan ◽  
B. Lohman ◽  
A. M. McKinney
Keyword(s):  
Case Report ◽  
Magnetic Resonance ◽  
Contrast Medium ◽  
Digital Subtraction Angiography ◽  
Magnetic Resonance Venography ◽  
Two Dimensional ◽  
Digital Subtraction ◽  
Vein Of Galen ◽  
Spontaneous Thrombosis ◽  
Vein Of Galen Aneurysm

Spontaneous thrombosis of a vein of Galen aneurysmal malformation (VOGM) is rare. We describe a 2-month-old patient with a patent VOGM and hydrocephalus, also confirmed patent at 6 months, but with subsequent lack of filling on preembolization catheter digital subtraction angiography (DSA) at 9 months’ age. Due to the presence of T1- and T2-bright signal, noncontrast T1-weighted images (T1WI), T2-weighted images (T2WI), two-dimensional (2D) time-of-flight (TOF) magnetic resonance venography (MRV), and postcontrast T1WI were ambiguous for patency. However, subtracting the pre- from the postcontrast MRV images confirmed closure compared to subtracted images at 6 months’ age. The factors contributing to thrombosis were likely a combination of a disproportionately small straight sinus, ventriculostomy, and contrast medium from DSA.

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