Discrimination of brain abscess from necrotic or cystic tumors by diffusion-weighted echo planar
SE-EPI (spin echo- echo planar
imaging), dusuk uzaysal cozunurluk ve zayif SNR (signal-to-noise ratio) ile sinirli goruntu kalitesi saglar ve bulaniklastirma, golgelenme gibi cesitli artefaktlara aciktir.
The protocol used for breast MRI included (a: Axial table-I, table-II Spine Echo sequences b: Axial Short Tau Inversion recover (STIR) sequence for fat suppression and c: Axial DWI echo planar
sequence using a combination of b-values of 0 and 750 mm2/sec).
This guide introduces the basics of magnetic resonance imaging, covering its physics from basic principles to more advanced topics, such as MR angiography and fast scanning techniques, and techniques made possible with high-performance gradients, such as echo planar
Diffusion weighted MRI was performed by a single-shot spin echo (SE) echo planar
imaging (EPI) sequence using b-values of 0, 500, and 1000.
A multislice axial plane with a single shot, echo planar
spin echo sequence (b: 50 sec/[mm.sup.2], 400 sec/[mm.sup.2], and 800 sec/[mm.sup.2] and ADC) technique was performed for the DWI.
PWI data were obtained using an echo planar
imaging pulse sequence with following parameters: TR/TE, 1600 ms/22.8 ms; slice thickness, 5 mm; matrix, 128 x 128; and flip angle of 90[degrees].
Perfusion imaging is based on rapid imaging (echo planar
imaging) of the first pass of the contrast agent and can be performed by using either a gradient-echo or a spin-echo pulse sequence.
This edition integrates recent hardware and software innovations, including advanced parallel radiofrequency transmission, magnetic resonance-positron emission tomography (MR-PET), and interventional MR; new imaging strategies, such as compressed sensing and cartilage mapping, multishot EPI (echo planar
imaging), and quantitative parametric mapping in the heart; added images; and new discussion of ultrahigh field 7-Tesla MR imaging, noncontrast MR angiography, and workflow optimization.
The main MR sequences include an inversion recovery prepared echo planar
imaging perfusion sequence inversion recovery TrueFISP sequence (delayed enhancement) and TrueFISP cine sequence for heart function measurement (including ejection fraction (EF) end diastolic volume (EDV) end systolic volume (ESV) stroke volume (SV) and cardiac output (CO)).
Osteaux, "Echo planar
magnetic resonance imaging of anisotropic diffusion in asparagus stems," MAGMA, Vol.
The echo planar
images (EPI) used in fMRI are prone to susceptibility artifacts; consequently, co-registration with the high-resolution structural MRI image will be imperfect, in particular near air-tissue interfaces (e.g.