scholarly journals Vena cava filter migration after magnetic resonance imaging

2017 ◽  
Vol 36 (9) ◽  
pp. 675-676
Author(s):  
Fernando Pivatto Júnior ◽  
Diogo Silva Piardi ◽  
Ângela Barreto Santiago Santos
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Vena Cava ◽  
Vena Cava Filter ◽  
Resonance Imaging ◽  
Filter Migration

scholarly journals Vena cava filter migration after magnetic resonance imaging

2017 ◽  
Vol 36 (9) ◽  
pp. 675-676
Author(s):  
Fernando Pivatto Júnior ◽  
Diogo Silva Piardi ◽  
Ângela Barreto Santiago Santos
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Vena Cava ◽  
Vena Cava Filter ◽  
Resonance Imaging ◽  
Filter Migration

Magnetic resonance imaging

2018 ◽  
Author(s):  
James F. Glockner ◽  
Kazuhiro Kitajima ◽  
Akira Kawashima
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Renal Disease ◽  
Vena Cava ◽  
Urinary Calculi ◽  
Upper Urinary Tract ◽  
Ct Urography ◽  
Resonance Imaging ◽  
Scan Time ◽  
Threatening Condition

Magnetic resonance imaging (MRI) provides excellent anatomic detail and soft tissue contrast for the evaluation of patients with renal disease. MRI needs longer scan time than computed tomography (CT); however, no radiation is involved. Gadolinium-based contrast agents (GBCAs) are used to help provide additional image contrast during MRI. MRI is indicated for characterization of renal mass, staging of malignant renal neoplasms, and determination of vena cava involvement by the renal tumour. Magnetic resonance (MR) angiography is widely accepted as a non-invasive imaging work-up of renal artery stenosis. MR urography is an alternative to CT urography to assess the upper urinary tract but does not identify urinary calculi. Diffusion-weighted imaging is a functional MR technique being used to characterize parenchymal renal disease and renal tumours. Nephrogenic systemic fibrosis is a rare but debilitating and potentially life-threatening condition which has been linked to exposure of GBCAs in patients with severe renal insufficiency. The risk versus benefit must be assessed before proceeding.

scholarly journals Effect of Right-Lateral Versus Left-Lateral Tilt Position on Compression of the Inferior Vena Cava in Pregnant Women Determined by Magnetic Resonance Imaging

2019 ◽  
Vol 128 (6) ◽  
pp. 1217-1222 ◽  
Author(s):  
Nobuko Fujita ◽  
Hideyuki Higuchi ◽  
Shiori Sakuma ◽  
Shunichi Takagi ◽  
Mahbub A. H. M. Latif ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Inferior Vena Cava ◽  
Pregnant Women ◽  
Inferior Vena ◽  
Vena Cava ◽  
Resonance Imaging ◽  
Lateral Tilt

scholarly journals Evaluation of renal anomalies, inferior vena cava variations, and left renalvein variations by lumbar magnetic resonance imaging in 3000 patients

2017 ◽  
Vol 47 ◽  
pp. 1866-1873 ◽  
Author(s):  
Alper DİLLİ ◽  
Fatma Sevin COŞAR AYAZ ◽  
Keziban KARACAN ◽  
Kürşad ZENGİN ◽  
Ümit Yaşar AYAZ ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Inferior Vena Cava ◽  
Inferior Vena ◽  
Vena Cava ◽  
Resonance Imaging ◽  
Renal Anomalies

Cardiac Magnetic Resonance Imaging of Mechanical Cavopulmonary Assistance

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Steven G. Chopski ◽  
Kevin Whitehead ◽  
George J. Englehardt ◽  
Amy Throckmorton
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Cardiac Magnetic Resonance Imaging ◽  
Power Efficiency ◽  
Vena Cava ◽  
Axial Flow ◽  
Patient Specific ◽  
Resonance Imaging ◽  
Scalar Stress

Mechanical circulatory support (MCS) options are limited for patients with dysfunctional single ventricle physiology. To address this unmet clinical need, we are developing an axial-flow blood pump to provide mechanical assistance to the cavopulmonary circulation. In this study, we investigate the use of high-resolution cardiac magnetic resonance imaging (MRI) to visualize the complex fluid flow conditions of mechanical circulatory assist in two patient-specific Fontan anatomies. A three-bladed axial-flow impeller coupled to a supportive cage with a four-bladed diffuser was positioned in the inferior vena cava (IVC) of each Fontan anatomy. Cardiac magnetic resonance (CMR) imaging and power efficiency studies were conducted at physiologic relevant parameters with cardiac outputs of 2, 3, and 4 L/min with impeller rotational speeds of 2000 and 4000 rpm. The axial-flow impeller was able to generate improved flow in the total cavopulmonary connection (TCPC). The higher rotational speed was able to redistribute flow in the TCPC anastomosis aiding in removing stagnant blood. No retrograde flow was observed or measured in the superior vena cava (SVC). As an extension of the CMR data, a scalar stress analysis was performed on both models and found a maximum scalar stress of approximately 42 Pa for both patient anatomies. The power efficiency experiments demonstrated a maximum energy gain of 8.6 mW for TCPC Anatomy 1 and 12.58 mW for TCPC Anatomy 2 for a flow rate of 4 L/min and at 4000 rpm. These findings support the continued development of axial blood pumps for mechanical cavopulmonary assist.

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