Ultra‐short echo‐time 2D time‐of‐flight MR angiography using a half‐pulse excitation

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Automatic Algorithm for Correcting Motion Artifacts In Time-Resolved 2D MR Angiography Using Convex Projections

Time-resolved contrast enhanced Magnetic Resonance Angiography (MRA) may suffer from involuntary patient motion. It is noted that while MR signal change associated with motion is large in magnitude and has smooth phase variation in k-phase, signal change associated with vascular enhancement is small in magnitude and has rapid phase variation in k-space. Based upon this observation, a novel POCS...

متن کامل

MR angiography with ultrashort echo time in cerebral aneurysms treated with Guglielmi detachable coils.

We evaluated a time-of-flight three-dimensional MR angiographic sequence with an ultrashort echo time for its ability to characterize the perfusional state of cerebral aneurysms that had been treated with Guglielmi detachable coils and to depict adjacent cerebral arteries. The results were compared with findings at conventional MR angiography and digital subtraction angiography. Adjacent vessel...

متن کامل

Cerebrovascular disorder diagnosis using MR angiography

In cerebrovascular disorder diagnosis computer-aided diagnosis of intracranial aneurysms, segmenting of high-intensity major vessels along with the low-contrast aneurysms is essential to the recognition of lethal vascular disease. This paper proposes a novel intensity-based algorithm to segment intracranial vessels and the attached aneurysms. The proposed method can handle intensity varying vas...

متن کامل

MR angiography using steady-state free precession.

Contrast-enhanced MR angiography (CE-MRA) using steady-state free precession (SSFP) pulse sequences is described. Using SSFP, vascular structures can be visualized with high signal-to-noise ratio (SNR) at a substantial (delay) time after the initial arterial pass of contrast media. The peak blood SSFP signal was diminished by <20% 30 min after the initial administration of 0.2 mmol/kg of Gd-che...

متن کامل

Coronary CT versus MR angiography: the role of MR angiography.

q RSNA, 2011 Coronary artery disease (CAD) is the most frequent cause of death in many developed countries ( 1 ), and there is a strong need for a noninvasive test that can reliably be used to delineate CAD without the use of ionizing radiation. Coronary magnetic resonance (MR) angiography has a history of nearly 20 years, and considerable technical advances have been made during this period ( ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Magnetic Resonance in Medicine

سال: 1999

ISSN: 0740-3194,1522-2594

DOI: 10.1002/(sici)1522-2594(199903)41:3<591::aid-mrm23>3.3.co;2-i