426. Flow measurement with MRI phase contrast technique
نویسندگان
چکیده
منابع مشابه
Rapid measurement of renal artery blood flow with ungated spiral phase-contrast MRI.
PURPOSE To verify the potential of ungated spiral phase-contrast (USPC), which has been shown to provide accurate and reproducible time-averaged measurements of pulsatile flow, for rapid measurement of renal artery blood flow (RABF) in vivo. MATERIALS AND METHODS The RABF rates of 11 normal human subjects and one patient with renal failure were measured with USPC within six seconds. RESULTS...
متن کاملPhase contrast MRI with flow compensation view sharing.
PURPOSE To develop and evaluate a technique for accelerating phase contrast MRI (PC-MRI) acquisitions without significant compromise in flow quantification accuracy. METHODS PC-MRI is commonly acquired using interleaved flow-compensated (FC) and flow-encoded (FE) echoes. We hypothesized that FC data, which represent background phase, do not change significantly over time. Therefore, we propos...
متن کاملPhase contrast MRI with flow compensation view sharing (FCVS)
Background Phase-contrast MRI (PC-MRI) is routinely used for quantification of blood flow and velocity in clinical. In a typical PC-MRI exam, flow compensated (FC) and flow encoded (FE) images are alternatively acquired as shown in Figure 1(a). However, in common carotid artery (CCA), FC images are very consistency due to limited physiological motion and background phase changes. In this regard...
متن کاملAccuracy of flow measurement with phase contrast MRI in a stenotic phantom: where should flow be measured?
Methods Herein, a series of detailed experiments are reported for validation of MR measurements of steady and pulsatile flows with stereoscopic particle image velocimetry (SPIV) on three different stenotic models with 50%, 74%, and 87% area occlusions. Mean inlet Reynolds number was 190 for both steady and pulsatile cases, mimicking the flow of the human common iliac artery. Axial PC-MRI images...
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parameters that have to be measured in gel dosimetry. However, the resolution in gel is strongly dependant on gel composition. Selection of optimum method in dose response readout and proper values of parameters can result in noise reduction as well as improvement of contrast, and spatial resolution considerably. Materials and Methods: MAGICA polymer gel dosimeters were manufactured and irradia...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1992
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003500822