نتایج جستجو برای: t1
تعداد نتایج: 33331 فیلتر نتایج به سال:
مقدمه: خانواده ژنی گلوتاتیون اس– ترانسفراز (gst) از آنزیم های متابولیکی مهم در سم زدایی مواد جهش زا و حذف کارسینوژنها می باشد. فقدان آللی ژنهای gstمی تواند در جمعیت های مختلف با افزایش خطر انواع سرطان به خصوص مرتبط با مصرف سیگار همراه باشد. هدف از این مطالعه، تعیین میزان فقدان ژنهای gstt1 و gstm1 در افراد سالم و بیماران مبتلا به سرطان ریه و تعیین رابطه آن با افزایش خطر ابتلا به سرطان ریه می باش...
AIMS Anderson-Fabry disease (AFD) is characterized by progressive multiorgan accumulation of intracellular sphingolipids due to α-galactosidase A enzyme deficiency, resulting in progressive ventricular hypertrophy, heart failure, arrhythmias, and death. Decreased native (non-contrast) left ventricular (LV) T1 (longitudinal relaxation time) with MRI discriminates AFD from healthy controls or oth...
In this paper the impact of adding trivalent samarium (Sm3+) rare earth (RE3+) ions on nuclear shielding performances borate/sodium/potassium glasses with chemical form B2O3(70–x)/Na2O15/K2O15/Sm2O3; x = 0.0–2.0 mol% was examined. Material densities were enhanced quantitatively from 2.22 to 2.48 g/cm3. Several radiation parameters have been determined in 0.15–15 MeV photon energy range via MCNP...
BACKGROUND Myocardial T1 and T2 mapping using cardiovascular magnetic resonance (CMR) are promising to improve tissue characterization and early disease detection. This study aimed at analyzing the feasibility of T1 and T2 mapping at 3 T and providing reference values. METHODS Sixty healthy volunteers (30 males/females, each 20 from 20-39 years, 40-59 years, 60-80 years) underwent left-ventri...
BACKGROUND AND PURPOSE The T1-weighted fast spin-echo (T1-FSE) MR imaging sequence is not used routinely, since the speed advantage is not as dramatic as it is in T2-weighted imaging. We evaluated the T1-FSE sequence to determine whether this technique can replace the conventional T1-weighted spin-echo (T1-SE) sequence for routine contrast-enhanced imaging. METHODS Sixty-nine patients with in...
STUDY DESIGN Retrospective evaluation. PURPOSE To analyze the effect of T1 slope on degree of degeneration in patients with cervical disc degeneration. OVERVIEW OF LITERATURE The T1 slope is well known parameter that may be very useful in evaluating sagittal balance. There are no reports on the analysis of the relationship between T1 slope and cervical disc degeneration. We hypothesized tha...
This paper discusses the decidability of determinacy and subsumption for tree transducers. For two tree transducers T1 and T2, T1 determines T2 if the output of T2 is identified by the output of T1, that is, there is a partial function f such that [[T2]] = f ◦ [[T1]] where [[T1]] and [[T2]] are tree transformation relations induced by T1 and T2, respectively. Also, T1 subsumes T2 if T1 determin...
Background Myocardial T1 and extracellular volume (ECV) derived from cardiovascular MRIs are more and more widely accepted as important markers for diagnosis, risk prediction and monitoring of cardiac disease. Yet data regarding long-term stability of myocardial T1 mapping are lacking. The aim of this study was to investigate the long-term stability of native and postcontrast T1 mapping values ...
Objective(s): The study objective was to assess the diagnostic performance of positron emission tomography (PET) for gliomas using the novel tracer 18F-fluciclovine (anti-[18F]FACBC) and to evaluate the safety of this tracer in patients with clinically suspected gliomas.Methods: Anti-[18F]FACBC was administered to 40 patients with clinically suspected high- or low-grade gliomas, followed by PET...
Type 1 interferons (T1-IFNs) play a major role in antiviral defense, but when or how they protect during infections that spread through the lympho-hematogenous route is not known. Orthopoxviruses, including those that produce smallpox and mousepox, spread lympho-hematogenously. They also encode a decoy receptor for T1-IFN, the T1-IFN binding protein (T1-IFNbp), which is essential for virulence....
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