415 EFFECTS OF SPIN-LOCK TIME SELECTION IN T1RHO RELAXOMETRY

Experimental Evaluation of Accelerated T1rho Relaxation Quantification in Human Liver Using Limited Spin-Lock Times

OBJECTIVE It was reported lately that to obtain consistent liver T1rho measurement, at 3T MRI using six spin-lock times (SLTs), is feasible. In this study, the feasibility of using three or two SLT points to measure liver T1rho relaxation time was explored. MATERIALS AND METHODS Seventeen healthy volunteers underwent 36 examinations. Three representative axial slices were selected to cut thro...

Intervertebral disc T1rho relaxation mapping with spin-lock 3D b-FFE imaging at 3T

Introduction: Quantitative T1ρ imaging (1) is a non-invasive MRI technique that has been shown to be sensitive to interactions between motion restricted water molecules and their surrounding macromolecular environment. T1ρ-weighted contrast is produced by transverse magnetization relaxation in the presence of an on-resonance continuous wave (cw) RF pulse (spin-lock pulse). T1ρ quantification sh...

A space- and time-efficient local-spin spin lock

A Space- and Time-eÆcient Local-spin Spin Lock

A simple code transformation is presented that reduces the space complexity of Yang and Anderson's local-spin mutual exclusion algorithm. In this algorithm, only atomic read and write instructions are used; each process generates (logN) remote memory references per lock request, where N is the number of processes. The space complexity of the transformed algorithm is (N), which is clearly optima...

evidence of adverse selection in irans health insurance market

در این تحقیق به مطالعه وجود انتخاب نامساعد(کژ گزینی) در بازار بیمه درمان تکمیلی ایران پرداخته شده است. داده های مورد نیاز توسط پرسشنامه و به روش نمونه گیری خوشه ای جمع آوری شده است. پرسشنامه ها در میان افراد شاغل ساکن شهر تهران توریع شد. در این تحقیق با استفاده از تخمین دو مدل لجستیک و به دست آوردن ضریب همبستگی میان تقاضای بیمه درمان تکمیلی و رخداد خسارت به بررسی موضوع مورد نظر پرداخته شده است....