Motion correction of free-breathing magnetic resonance renography using model-driven registration
نویسندگان
چکیده
منابع مشابه
Motion Correction in Magnetic Resonance Imaging Using the Signal of Free-Induction-Decay
Magnetic resonance imaging (MRI) is highly susceptible to subject’s motion and can significantly degrade image quality. In brain MRI exams, involuntary headmovements can affect the sampled k-space data. Such unintended alterations may result in visible image artifacts such as blurring, ghosting and others, and therefore potentially disqualify the image fromdiagnostic purposes. Methods to charac...
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Renovascular disease is an important cause of hypertension. For assessing treatment options for renovascular disease such as angioplasty or nephrectomy, it is important to characterize the renal tissue. Magnetic resonance (MR) renography is becoming a viable method for characterization of the renal tissue. However, analysis of MR renography is hampered by tissue motion. We investigate two autom...
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A novel technique is presented which enables the calibration of a 3D affine respiratory motion model to the individual motion pattern of the patient. The concept of multiple navigators and precursory navigators is introduced to address nonlinear properties and hysteresis effects of the model parameters with respect to the conventional diaphragmatic navigator. The optimal combination and weighti...
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Abdominal magnetic resonance imaging (MRI) is complicated by tissue motion as well as by weak tissue contrast. The major source of motion is respiration, which can be dealt with by breath-hold imaging or by respiratory triggering. Nevertheless, these commonly used methods are known to have their limitations in terms of patient burden as well as in image quality. We propose a method that allows ...
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OBJECTIVE Contemporary free-breathing non contrast enhanced cardiovascular magnetic resonance angiography (CMRA) was qualitatively and quantitatively evaluated to ascertain the reproducibility of the method for coronary artery luminal dimension measurements. SUBJECTS AND METHODS Twenty-two healthy volunteers (mean age 32 +/- 7 years, 12 males) without coronary artery disease were imaged at 2 ...
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ژورنال
عنوان ژورنال: Magnetic Resonance Materials in Physics, Biology and Medicine
سال: 2021
ISSN: 0968-5243,1352-8661
DOI: 10.1007/s10334-021-00936-x