منابع مشابه
3D MRA visualization and artery-vein separation using blood-pool contrast agent MS-325.
Magnetic resonance angiography (MRA) is established as an important complementary technique to conventional angiography, and contrast–enhanced MRA (CE-MRA) offers even higher contrast between the vascular lumen and surrounding structures. MS-325 is a gadolinium-based MR contrast agent designed specifically for blood-pool imaging, or MRA, and is the only gadolinium-based intravascular contrast a...
متن کاملNeurovascular 4DFlow MRI (Phase Contrast MRA): emerging clinical applications
Recent advances in 4DFlow MRI (Phase Contrast MRA) acquisition and reconstruction enable high resolution exams to be obtained in practical imaging times. 4DFlow MRI provides images of vascular morphology and quantitative measurements of blood velocity throughout a 3D imaging volume. Hemodynamic parameters such as flow volume, relative wall shear stress, streamlines, vorticity and pressure gradi...
متن کاملStatistical Cerebrovascular Segmentation for Phase-Contrast MRA Data
In this paper, we present a statistically based segmentation algorithm to extract vascular tree from Phase Contrast Magnetic Resonance Angiography, “PCMRA”. Classification is based on the intensity distribution of the tissues in the data volume, where voxels are classified as either vessels or non-vessels. Our algorithm is adaptive to reduce the bias field effect in the images by estimating the...
متن کاملNon-Contrast MRA Based-on SSFP
Conventional non-contrast MRA techniques, including time-of-flight (TOF) and phase contrast (PC) methods have not been widely used in clinical practice due to their lengthy acquisition times and potential overestimation of the severity of stenosis due to stagnant or complex flow. However, the TOF phenomenon has become the basis for a variety of MRA techniques that utilize magnetization preparat...
متن کاملNon-Contrast MRA
Introduction In MR angiography (MRA), techniques are mainly divided into contrast-enhanced MRA and non-contrast MRA. Various non-contrast MRA techniques are clinically useful and widely used in routine examinations, such as 3D TOF [1] in intracranial region, phase shift [2] for flow quantification, arterial spin labeling [3,4] in pulmonary vessels [5,6], and balanced SSFP [7] in bright blood ca...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1992
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003500721