Saadallah Ramadan

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Diffusion-weighted imaging provides a novel contrast mechanism in magnetic resonance (MR) imaging and has a high sensitivity in the detection of changes in the local biologic environment. A significant advantage of diffusion-weighted MR imaging over conventional contrast material-enhanced MR imaging is its high sensitivity to change in the microscopic(More)
The purpose of this work was to design and implement constant adiabaticity gradient modulated pulses that have improved slice profiles and reduced artifacts for spectroscopic imaging on 3T clinical scanners equipped with standard hardware. The newly proposed pulses were designed using the gradient offset independent adiabaticity (GOIA, Tannus and(More)
Magnetic resonance (MR) imaging is a widely available and well accepted non invasive imaging technique. Development of automatic and semi-automatic techniques to analyse MR images has been the focus of much research and numerous publications. However, most of this research only uses the magnitude of the acquired complex MR signal, discarding the phase(More)
Spinal cord injury (SCI) can be accompanied by chronic pain, the mechanisms for which are poorly understood. Here we report that magnetic resonance spectroscopy measurements from the brain, collected at 3T, and processed using wavelet-based feature extraction and classification algorithms, can identify biochemical changes that distinguish control subjects(More)
AIM This study aims to (1) undertake and analyse 1D and 2D MR correlation spectroscopy from human soleus muscle in vivo at 7T, and (2) determine T1 and T2 relaxation time constants at 7T field strength due to their importance in sequence design and spectral quantitation. METHOD Six healthy, male volunteers were consented and scanned on a 7T whole-body(More)
Information for determining whether a primary breast lesion is invasive and its receptor status and grade can be obtained before surgery by performing proton MRS on a fine-needle aspiration biopsy (FNAB) specimen and analyzing the MRS information by a pattern recognition method. Two-dimensional MRS, on either specimens or cells, allows the unambiguous(More)
3. Data Collection and Post-Processing 3066 3.1. Optimizing the Signal-to-Noise Ratio 3066 3.2. Data Acquisition 3067 3.3. Shimming 3067 3.4. Water Suppression 3067 3.5. Localization To Examine an Area of Disease 3067 3.6. Single Voxel Spectroscopy (SVS) Methods 3068 3.7. STEAM (“Stimulated Echo Acquisition Mode”) 3068 3.8. PRESS (“Point-Resolved(More)
PURPOSE We compared diffusion-weighted imaging (DWI) of the breast using 2 different b-values to determine the optimal b-value for greatest signal contrast between tumors and normal tissue of the breast. MATERIALS AND METHODS We performed DWI of the breast at b-values of 1000 s/mm(2) and 1500 s/mm(2) in 120 patients (121 lesions, 19 benign, 102 malignant)(More)
Acetonitrile extracts of ulcerated and control rat stomachs were studied by various NMR techniques in an attempt to understand how indomethacin, a common and powerful nonsteroidal antiinflammatory drug (NSAID), induces ulcers in the stomach. One- (1D) and two-dimensional (2D) NMR spectra of extracts of ulcerated and control stomachs revealed that glycolytic(More)