9. Evaluation of adequate pulse sequence for 3D TOF MRA with TONE
نویسندگان
چکیده
منابع مشابه
Optimization of MR Parameters of 3D TOF-MRA for Various Intracranial Stents at 3.0T MRI
PURPOSE The in-stent signal reduction of the stented artery caused by susceptibility artifact or radiofrequency shielding artifact limited the use of time-of-flight MR angiography (TOF-MRA) as a follow-up tool after intracranial stenting. We showed the degree of an artifact according to different stent types, and optimized MR parameters for TOF-MRA in patients with intracranial stent on 3.0 T M...
متن کاملStatistical-Based Approach for Extracting 3D Blood Vessels from TOF-MRA Data
In this paper we present an automatic statistical intensity basedapproach for extracting the 3D cerebrovascular system from time-of-flight (TOF) magnetic resonance angiography (MRA) data. The voxels of the dataset are classified as either background tissues, which are modeled by a finite mixture of one Rayleigh and two normal distributions, or blood vessels, which are modeled by one normal dist...
متن کامل3D TOF MRA of the intracranial arteries: effects of increasing magnetic field to 4.7T
A. Eissa, A. Wilman Biomedical Engineering, University of Alberta, Edmonton, AB, Canada INTRODUCTION TOF MRA has been successful at 3T (1,2) largely due to the increases in SNR and T1 relaxation times. The higher SNR at higher fields allows for higher resolution. The increase in T1 values will also allow for higher background suppression. However, increasing field also suffers from increasing R...
متن کاملContrast-enhanced MR angiography of intracranial giant aneurysms.
BACKGROUND AND PURPOSE Intravoxel phase dispersion and flow saturation often prevent adequate depiction of intracranial giant aneurysms on 3D time-of-flight (3D-TOF) MR angiography (MRA). Additional diagnostic difficulties may arise from T1 contamination artifact of an associated blood clot. Our aim was to assess whether contrast-enhanced MRA could improve the evaluation of giant aneurysms and ...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1994
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003325812