نتایج جستجو برای: t2 weighted image
تعداد نتایج: 489328 فیلتر نتایج به سال:
INTRODUCTION Gradient echo (GRE) imaging has a wide range of clinically useful applications. In particular, GRE imaging is frequently used in the clinic for anatomical/structural imaging and imaging dynamics for diseases that span all organ systems and numerous pathologies. In general, an advantage of GRE imaging is the fact that it is regarded as “fast” owing to the generally short repetition ...
In a clinical setting, it is important to diagnose complications of acute cholecystitis accurately. Diffusion-weighted whole body imaging with background body signal suppression/T2-weighted image fusion (DWIBS/T2) provides high signal intensity with a strong contrast against surrounding tissues in anatomical settings. In the present study, patients who were being treated for acute cholecystitis...
Thrombosis We read with great interest the article by Boukobza et al reporting the usefulness of the T2 gradient-echo (T2*) sequence in making the diagnosis of isolated cortical vein thrombosis. In substance, the authors claim that magnetic susceptibility effect (MSE) is always visible, regardless of the age of the thrombi in the veins. Therefore, after reading this article, one can understand ...
INTRODUCTION/PURPOSE In vivo detection of cerebral microbleeds (CMBs) from T2* gradient recalled echo (GRE) magnitude image suffers from low specificity, modest inter-rater reproducibility and is biased by its sensitivity to acquisition parameters. New methods were proposed for improving this identification, but they mostly rely on 3D acquisitions, not always feasible in clinical practice. A fa...
BACKGROUND Some patients with low-grade glioma have extraordinarily long survival times; current, early treatment does not prolong their lives. For this reason, therapies that sometimes have neurologic side effects are often deferred intentionally. METHODS In a study of oligodendrogliomas, we used a quantitative method of MR analysis based on the S-transform to investigate whether codeletion ...
PURPOSE To investigate the decrease in signal intensity on T1 - weighted MR images of some hemorrhagic intracranial lesions after administration of contrast material. METHODS Postprocessing digital image subtraction was performed in 16 MR studies (13 patients) of lesions that showed hyperintensity on noncontrast T1-weighted images. Repetition time and echo time were identical for all precontr...
To determine whether the cyst fluid characteristics of endometrioma can be evaluated by magnetic resonance imaging (MRI), 36 endometriomas obtained from 24 patients (age range 21-43 years; mean 34 years) were studied. MRI was performed < 2 weeks before laparoscopy or laparotomy. Comparative studies of the density and concentration of iron in the endometrioma and the signal intensity (SI) of MRI...
Conventional MR images are qualitative and rely on subjective interpretation of changes in tissue appearance to diagnose injury or disease. Several inherent tissue properties contribute to a tissue's appearance in an MR image. These properties include the tissue's T1 time, T2 time, and proton density. Specific MR pulse sequences are designed to generate image contrast based on these inherent pr...
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