نتایج جستجو برای: pi acquisition
تعداد نتایج: 153826 فیلتر نتایج به سال:
M. Markl, J. Leupold, J. Hennig Diagnostic Radiology, Medical Physics, University Hospital Freiburg, Freiburg, Germany Introduction: k-space segmented time-resolved (CINE) balanced SSFP imaging is widely used in cardiac MR-imaging [1]. Drawbacks include sensitivity to the disruption of the steady state and limitations regarding non-linear k-space reordering which is problematic for SSFP imaging...
R is called commuting regular ring (resp. semigroup) if for each x,y $in$ R there exists a $in$ R such that xy = yxayx. In this paper, we introduce the concept of commuting $pi$-regular rings (resp. semigroups) and study various properties of them.
PURPOSE to describe values found for the resistance index (RI), pulsatility index (PI) and the systole/diastole (S/D) ratio of fetal renal arteries in non-complicated gestations between the 22nd and the 38th week, and to evaluate whether those values vary along that period. METHODS observational study, where 45 fetuses from non-complicated gestations have been evaluated in the 22nd, 26th, 30t...
Phosphorus (P) acquisition and partitioning are essential for plant homeostasis. P is available for plant uptake when in its inorganic form (H2PO4-, or Pi), but Pi is often limiting in soils. Plants secrete acid phosphatases (APases) into the apoplastic space, which may be important for obtaining Pi from organic P sources; however, the relative importance of these enzymes for plant P nutrition ...
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