Related Experiment Videos
Ligating clips for three-dimensional MR angiography at 1.5 T: in vitro evaluation
D Weishaupt1, H H Quick, D Nanz
1Institute of Diagnostic Radiology, University Hospital Zürich, Switzerland.
Radiology
|March 14, 2000
Summary
Biodegradable vascular clips cause no artifacts on 3D MR angiography. Titanium clips cause susceptibility effects, with artifact size depending on several factors. Optimize imaging parameters for titanium clips to minimize artifacts.
Area of Science:
- Medical Imaging
- Biomaterials Science
- Cardiovascular Surgery
Background:
- Vascular clips are essential in surgical procedures.
- Assessing imaging artifacts from implants is crucial for diagnostic accuracy.
- Different clip materials may interact differently with Magnetic Resonance Imaging (MRI).
Purpose of the Study:
- To evaluate the artifact size and safety of titanium and biodegradable polydioxanone vascular clips on 3D MR angiography.
- To determine factors influencing artifact size caused by titanium clips.
- To provide recommendations for optimizing 3D MR angiography in the presence of vascular clips.
Main Methods:
- Three-dimensional (3D) MR angiography was performed.
- Safety and artifact generation of 15 titanium and three polydioxanone clips were assessed.
- Artifact size was analyzed in relation to clip characteristics and imaging parameters (echo time, k-space coverage).
Main Results:
- All tested clips were found to be completely safe.
- Biodegradable polydioxanone clips produced no artifacts.
- Titanium clips induced susceptibility artifacts, with size influenced by clip size, orientation, echo time, and k-space coverage.
Conclusions:
- Biodegradable vascular clips are artifact-free on 3D MR angiography.
- Titanium clips cause artifacts, necessitating optimized imaging protocols.
- Fast 3D MR angiography with shortest echo time and full k-space coverage is recommended when using titanium clips.