ADAPTATION OF ECG-GATED NON-CONTRAST ENHANCED MAGNETIC RESONANCE ANGIOGRAPHY TRIGGER DELAY TECHNIQUE FOR PATIENTS WITH HIGH HEART RATE.
- Resource Type
- Article
- Authors
- AASNA, Alvar; NIGUL, Mait; KEPLER, Kalle
- Source
- Medical Physics in the Baltic States. 2017, Vol. 13, p3-6. 4p.
- Subject
- *MAGNETIC resonance angiography
*CARDIOVASCULAR system physiology
*ELECTROCARDIOGRAPHY
*CONTRAST media
*PULSE frequency modulation
- Language
- ISSN
- 1822-5721
Non-contrast enhanced magnetic resonance angiography (MRA) is a magnetic resonance imaging (MRI) method for imaging cardiovascular system without using any contrast agents. There are numerous different techniques to perform non-contrast enhanced MRA images. Their usage depends on the scan region and purpose of the procedure. For imaging peripheral arteries without contrast enhancement, mainly ECGsynchronized 3D turbo-spin-echo (TSE) sequence is used. In this research authors compare quantitative values of ECG-synchronized non-contrast enhanced 3D TSE images, which are generated using two different trigger delay techniques to create a possibility to use a new technique for patients with elevated pulse frequency. Research results are based on experiment MRI scans performed on volunteers, who agreed to participate in the study. Existing ECG-synchronized peripheral arterial imaging method is limited for patients with elevated heart rate (greater than 80 beats per minute). The research goal was to modify a trigger delay technique so that this method could also be applied to patients with an increased pulse frequency. This study showed that selecting the diastolic trigger delay value from the beginning of the TR cycle (modified method) is a solution for performing ECG-synchronized non-contrast enhanced 3D TSE technique on patients with elevated heart rate. [ABSTRACT FROM AUTHOR]