Improving Perfusion Measurement in DSC-MR Imaging with Multiecho Information for Arterial Input Function Determination
نویسندگان
چکیده
منابع مشابه
Automatic calculation of the arterial input function for cerebral perfusion imaging with MR imaging.
An automated method for determination of arterial input function (AIF) for rapid determination of cerebral perfusion with dynamic susceptibility contrast magnetic resonance (MR) imaging was derived. In 100 patients, the automated method was used to create images of relative blood flow, relative cerebral blood volume, and mean transit time. In 20 patients, the voxel chosen with the automated AIF...
متن کاملPerfusion-weighted MR imaging studies in brain hypervascular diseases: comparison of arterial input function extractions for perfusion measurement.
BACKGROUND AND PURPOSE Brain hypervascular diseases are complex and induce hemodynamic disturbances on brain parenchyma, which are difficult to accurately evaluate by using perfusion-weighted (PWI) MR imaging. Our purpose was to test and to assess the best AIF estimation method among 4 patients with brain hypervascular disease and healthy volunteers. METHODS Thirty-three patients and 10 healt...
متن کاملFully-Automatic Determination of the Arterial Input Function for Dynamic Contrast-Enhanced Pulmonary MR Imaging
Recent studies have shown that dynamic contrast-enhanced pulmonary MR imaging (DCE-pMRI) is a very appropriate imaging technique for the clinical assessment of lung diseases. For the quantitative analysis of pulmonary blood flow (PBF), pulmonary blood volume (PBV), and mean transit time (MTT) an arterial input function (AIF) of the contrast agent entering the lung is required. The AIF is usuall...
متن کاملAutomated method for generating the arterial input function on perfusion-weighted MR imaging: validation in patients with stroke.
BACKGROUND AND PURPOSE The choice of arterial input function (AIF) can have a profound effect on the blood flow maps generated on perfusion-weighted MR imaging (PWI). Automation of this process could substantially reduce operator dependency, increase consistency, and accelerate PWI analysis. We created an automated AIF identification program (auto-AIF) and validated its performance against conv...
متن کاملQuantitative myocardial perfusion imaging using a step arterial-input function
Background Modern MRI myocardial perfusion protocols use rapid venous bolus injections, typically 3-5 ml/s of 5-15 ml of agent over a few seconds. The resulting arterial input functions are rapidly varying with high agent concentrations (Fig. 1A and 1B) and thus typically require high temporal resolution acquisitions (~1 sec), custom pulse sequences and complex processing methods for perfusion ...
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ژورنال
عنوان ژورنال: American Journal of Neuroradiology
سال: 2016
ISSN: 0195-6108,1936-959X
DOI: 10.3174/ajnr.a4700