The Usefulness of Three-Dimensional Gadolinium-Enhanced MR Venography for the Evaluation of Varices in Lower Extremities

2001 ◽  
Vol 45 (5) ◽  
pp. 465
Author(s):  
Myong Kwan Ko ◽  
Hee Lee ◽  
Sung Gwon Kang ◽  
Jeong Yeol Choi ◽  
Ju Nam Byun ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Lower Extremities ◽  
Mr Venography

Three-dimensional low dose gadolinium-enhanced peripheral MR venography

1998 ◽  
Vol 8 (3) ◽  
pp. 630-633 ◽  
Author(s):  
Wei Li ◽  
Vivek David ◽  
Richard Kaplan ◽  
Robert R. Edelman
Keyword(s):  
Low Dose ◽  
Three Dimensional ◽  
Mr Venography

scholarly journals A three-dimensional gadolinium-enhanced MR venography technique for imaging central veins.

1999 ◽  
Vol 173 (4) ◽  
pp. 999-1003 ◽  
Author(s):  
M J Thornton ◽  
R Ryan ◽  
J C Varghese ◽  
M A Farrell ◽  
B Lucey ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Mr Venography

Updates in Magnetic Resonance Venous Imaging

2021 ◽  
Vol 38 (02) ◽  
pp. 202-208
Author(s):  
Pamela Lombardi ◽  
James C. Carr ◽  
Bradley D. Allen ◽  
Robert R. Edelman
Keyword(s):  
Magnetic Resonance ◽  
Recent Literature ◽  
Imaging Modality ◽  
Lower Extremities ◽  
Current Status ◽  
Venous Disease ◽  
Mr Venography ◽  
Imaging Parameters ◽  
Noncontrast Mra ◽  
Pelvic Congestion

AbstractFor years, magnetic resonance angiography (MRA) has been a leading imaging modality in the assessment of venous disease involving the pelvis and lower extremities. Current advancement in noncontrast MRA techniques enables imaging of a larger subset of patients previously excluded due to allergy or renal insufficiency, allowing for preintervention assessment and planning. In this article, the current status of MR venography, with a focus on current advancements, will be presented. Protocols and parameters for MR venographic imaging of the pelvis and lower extremities, including contrast and noncontrast enhanced techniques, will be reviewed based on a recent literature review of applied MR venographic techniques. Finally, several disease-specific entities, including pelvic congestion and compression syndromes, will be discussed with a focus on imaging parameters that may best characterize these disease processes and optimize anatomical planning prior to intervention.

scholarly journals Energy Absorption Strategies in the Lower Extremities during Double-Leg Landings in Knee Valgus Alignment

2020 ◽  
Vol 10 (23) ◽  
pp. 8742
Author(s):  
Akihiro Tamura ◽  
Kiyokazu Akasaka ◽  
Takahiro Otsudo
Keyword(s):  
Energy Absorption ◽  
Mechanical Load ◽  
Three Dimensional ◽  
Lower Extremities ◽  
Mechanical Work ◽  
Knee Valgus ◽  
Landing Position ◽  
Drop Jumps ◽  
Analysis System ◽  
Valgus Alignment

Landing with the knee in a valgus position may alter energy absorption strategies in the lower extremities and increase mechanical stress on the knee joint. We compared the energy absorption strategies in the lower extremities during valgus and varus landings. Seventeen females were divided into valgus and varus groups. Lower extremity kinetic data were obtained during drop jumps, using a three-dimensional motion analysis system. Negative mechanical work in the lower extremities were calculated during landing. The valgus group exhibited significantly more negative mechanical work at the knee, and less negative mechanical work at the hip, compared with the varus group. However, there was no difference in the negative mechanical work at the ankle between the two groups. Findings suggest that an increased valgus landing reduces the contribution of the hip to energy absorption and is associated with a reciprocal increased contribution by the knee. Hence a knee valgus landing position may be a key biomechanical factor that increases energy absorption in the knee, thereby increasing the risk of injury. Results further indicate that this can be prevented by adopting a knee varus position on landing, which facilitates absorption of the mechanical load at the hip, rather than at the knee.

Determination of three-dimensional joint loading within the lower extremities in snowboarding

2011 ◽  
Vol 226 (2) ◽  
pp. 170-175 ◽  
Author(s):  
Andreas Krüger ◽  
Paul McAlpine ◽  
Fabio Borrani ◽  
Jürgen Edelmann-Nusser
Keyword(s):  
Three Dimensional ◽  
Lower Extremities ◽  
Joint Loading

Three-dimensional steady-state MR angiography of the lower extremities

1994 ◽  
Vol 4 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Petra Schmalbrock ◽  
Vicky A. Hacker ◽  
Anita Rao
Keyword(s):  
Steady State ◽  
Mr Angiography ◽  
Three Dimensional ◽  
Lower Extremities

Effort-induced thrombosis: diagnosis with three-dimensional MR venography

2002 ◽  
Vol 9 (6) ◽  
pp. 326-328 ◽  
Author(s):  
Ivan Pedrosa ◽  
Carl Aschkenasi ◽  
Allen Hamdan ◽  
Neil M. Rofsky
Keyword(s):  
Three Dimensional ◽  
Mr Venography

scholarly journals A novel protocol for three-dimensional rotational venography with low-dose contrast media in preoperative angiography of brain tumours

2019 ◽  
Vol 32 (6) ◽  
pp. 452-457
Author(s):  
Kimiaki Kashimoto ◽  
Katsunori Asai ◽  
Manabu Kinoshita ◽  
Yoshiko Okita ◽  
Shogo Tanabe ◽  
...  
Keyword(s):  
Contrast Media ◽  
Brain Tumours ◽  
Low Dose ◽  
Cerebral Arteries ◽  
Three Dimensional ◽  
Preoperative Assessment ◽  
Mr Venography ◽  
Time To Peak ◽  
The Mean ◽  
Time Density

Aim The most appropriate imaging protocol for three-dimensional rotational venography (3D RV) has not been established. The aim of this study was to optimise the protocol for 3D RV with low-dose contrast media using time–density curve analysis. Methods Twenty-five consecutive patients with brain tumours who received preoperative assessment with 3D RV were retrospectively collected and included in this study. To optimise the imaging delay time of 3D RV with low-dose contrast media, time–density curve analysis was performed on two-dimensional conventional angiography. The image quality for depicting cortical veins and venous sinuses was compared to that of magnetic resonance (MR) venography in five cases. Results A total of 27 3D RVs were performed in 25 patients. The time–density curves of cortical veins were different from those of cerebral arteries or sinuses. The mean time to peak of cortical veins was significantly longer than the time to peak of cerebral arteries (2.47 ± 0.35 seconds vs. 6.44 ± 1.14 seconds; p < 0.0001) and shorter than the time to peak of venous sinuses (6.44 ± 1.14 seconds vs. 8.18 ± 1.12 seconds; p < 0.0001). The optimal imaging delay time could be determined as the phases in which cortical arterial opacities disappeared and cortical veins started to appear. The mean dose of injected contrast media was 5.3 mL. The image quality of cortical veins in 3D RV was superior to that in MR venography in all cases. Conclusions Three-dimensional RV with low-dose contrast media was useful for the preoperative assessment of cortical veins in patients with brain tumours.

Intracranial Venous System: Gadolinium-enhanced Three-dimensional MR Venography with Auto-triggered Elliptic Centric-ordered Sequence—Initial Experience

Radiology ◽  
2003 ◽  
Vol 226 (1) ◽  
pp. 203-209 ◽  
Author(s):  
Richard I. Farb ◽  
James N. Scott ◽  
Robert A. Willinsky ◽  
Walter J. Montanera ◽  
Graham A. Wright ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Venous System ◽  
Initial Experience ◽  
Mr Venography
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