Mono-Exponential Fitting in T2-Relaxometry: Relevance of Offset and First Echo
نویسندگان
چکیده
منابع مشابه
Mono-Exponential Fitting in T2-Relaxometry: Relevance of Offset and First Echo
INTRODUCTION T2 relaxometry has become an important tool in quantitative MRI. Little focus has been put on the effect of the refocusing flip angle upon the offset parameter, which was introduced to account for a signal floor due to noise or to long T2 components. The aim of this study was to show that B1 imperfections contribute significantly to the offset. We further introduce a simple method ...
متن کاملIncreased anterior temporal lobe T2 times in cases of hippocampal sclerosis: a multi-echo T2 relaxometry study at 3 T.
BACKGROUND AND PURPOSE Increased T2 relaxation times in the ipsilateral hippocampus are present in patients with hippocampal sclerosis. Visual assessment of T2-weighted images of these patients suggests increased signal intensity in the anterior temporal lobe as well. Our aim was to assess hippocampal and anterior temporal T2 relaxation times in patients with partial epilepsy by using a new T2-...
متن کاملT2 relaxometry of the hippocampus at 3T.
BACKGROUND AND PURPOSE T2 mapping is useful for identifying and quantifying abnormalities of the hippocampus and amygdala. It is particularly useful in the presurgical evaluation of patients with temporal lobe epilepsy and for the identification of bilateral hippocampal sclerosis (HS). The purpose of this study was to implement and validate a dual-echo method for producing coronal T2 maps with ...
متن کاملHippocampal T2 relaxometry in epilepsy: past, present, and future.
Mesial temporal sclerosis (MTS) is the most common known pathologic substrate of epilepsy. Accurate preoperative identification of unilateral MTS bymagnetic resonance (MR) imaging has had a tremendous impact on the clinical management of medically refractory seizures. It was well known in the pre-MR era that obtaining a temporal lobectomy specimen that contained MTS conferred a higher probabili...
متن کاملefl students gender and socioeconomic status: the use of politeness strategies in the first and second languages
within the components of communicative competence, a special emphasis is put on the “rules of politeness,” specifically the politeness strategies (brown and levinson, 1978) that speakers deploy when performing the request speech act. this is because the degree of imposition that making a request places upon one’s interlocutor(s) has been seen to be influenced by several factors among which, as ...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLOS ONE
سال: 2015
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0145255