Introduction: Typically, magnetic resonance spectroscopy sequences attempting to measure glutamate aim to utilize the shortest echo time achievable to reduce the effects of J-coupling and T2 relaxation. However, in 2017, Wong et al. described the optimal echo time for glutamate detection for 7T semi-LASER proton magnetic resonance spectroscopy (1H-MRS) to be in the range of 100 to 125ms, which ...

BACKGROUND AND PURPOSE A novel quantitative susceptibility mapping (QSM) processing technology has been developed to map tissue susceptibility property without blooming artifacts. We hypothesize that hematoma volume measurement on QSM is independent of imaging parameters, eliminating its echo time dependence on gradient echo MRI. METHODS Gradient echo MRI of 16 patients with intracerebral hem...

We derive a general formalism with which it is possible to obtain the time (τ) dependence of the echo size for a spin in a stochastic field environment. Our model is based on “strong collisions”. We examine in detail three cases where: (I) the local field is ±ω0, (II) the field distribution is continuous and has a finite second moment, and (III) the distribution is Lorentzian. The first two cas...

A rapid technique for mapping of T(2) relaxation times is presented. The method is based on the conventional single-echo spin echo approach but uses a much shorter pulse repetition time to accelerate data acquisition. The premise of the new method is the use of a constant difference between the echo time and pulse repetition time, which removes the conventional and restrictive requirement of pu...

background: ovarian immature teratoma is a very rare type of tumor associated with a high relapse rate and mortality. correspondingly, early diagnosis is important for effective treatment. the goal of this study was to retrospectively analyze the ultrasound characteristics of 11 cases of immature teratomas. materials and methods: between january 2002 and december 2010, 11 patients were diagnose...