نتایج جستجو برای: magnetic resonance imaging denoising

تعداد نتایج: 745036  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی و مهندسی 1390

magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان فارس - دانشکده دندانپزشکی 1380

چکیده ندارد.

Journal: :journal of medical signals and sensors 0
mostafa heydari mohammad reza karami

although there are many methods for image denoising, but partial differential equation (pde) based denoising attracted much attention in the field of medical image processing such as magnetic resonance imaging (mri). the main advantage of pde-based denoising approach is laid in its ability to smooth image in a nonlinear way, which effectively removes the noise, as well as preserving edge throug...

Magnetic Resonance Imaging (MRI) is a notable medical imaging technique that is based on Nuclear Magnetic Resonance (NMR). MRI is a safe imaging method with high contrast between soft tissues, which made it the most popular imaging technique in clinical applications. MR Imagechr('39')s visual quality plays a vital role in medical diagnostics that can be severely corrupted by existing noise duri...

Journal: :iranian journal of radiology 0
chermaine deepa antony department of biomedical imaging, faculty of medicine, university malaya, kuala lumpur, malaysia; department of biomedical imaging, faculty of medicine, university malaya, 50603, kuala lumpur, malaysia. tel: +60-30379494422, fax: +60-379492030 kartini rahmat department of biomedical imaging, faculty of medicine, university malaya, kuala lumpur, malaysia anushya vijayananthan department of biomedical imaging, faculty of medicine, university malaya, kuala lumpur, malaysia jayalakshmi pailoor department of pathology, university malaya, kuala lumpur, malaysia

rhabdomyosarcoma is a common primary childhood malignancy that rarely metastasizes to the breast. we report a patient with a primary sinonasal rhabdomyosarcoma metastasizing to the breast, with no distant spread. we describe the imaging appearance of rhabdomyosarcoma on magnetic resonance imaging (mri), particularly on diffusion-weighted imaging (dwi) and apparent diffusion coefficient (adc) se...

Journal: :iranian journal of radiology 0
ali firat sarp radiology department, ataturk training and research hospital, izmir katip celebi university, izmir, turkey; radiology department, ataturk training and research hospital, izmir katip celebi university, izmir, turkey. fax: +90-2322431530 yeliz pekcevik radiology department, tepecik training and research hospital, izmir, turkey

lipomatosis of the nerve, also known as fibrolipomatous hamartoma, is characterized by the infiltration of the nerve by fibro-fatty tissue. the affected nerve becomes thicker, and it simulates a mass lesion. lipomatosis usually affects the median nerve and lipomatosis of the sciatic nerve is extremely rare. magnetic resonance imaging (mri) is the key to diagnosis, and it is usually pathognomoni...

Journal: :iranian journal of radiology 0
yasmin davoudi department of radiology, imam reza hospital, school of medicine, mashhad university of medical sciences, mashhad, iran mohsen foroughipour department of neurology, ghaem hospital, school of medicine, mashhad university of medical sciences, mashhad, iran reza torabi department of radiology, school of medicine, mashhad university of medical sciences, mashhad, iran parvaneh layegh department of radiology, imam reza hospital, school of medicine, mashhad university of medical sciences, mashhad, iran nassim matin school of medicine, tehran university of medical sciences, tehran, iran ali shoeibi department of neurology, ghaem hospital, school of medicine, mashhad university of medical sciences, mashhad, iran; department of neurology, ghaem hospital, school of medicine, mashhad university of medical sciences, p. o. box: 9197969764, mashhad, iran. tel: +98-9155137344, fax: +98-5138429828

conclusion these data indicate that while ce-mri will depict more positive results, there are cases in which dwi will show a positive result while ce-mri is negative. we suggest that the combination of these two imaging modalities might yield more positive results in diagnosing acute ms attack giving rise to a more accurate diagnosis. results ce-mri yielded positive results for 61 (87%) patient...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان - دانشکده علوم پایه دامغان 1394

در بین انواع نانوذره ها، نانوذره های مغناطیسی (mnps) نظر به کاربرد های بسیاری که در حوزه های مختلفی همچون مایعات مغناطیس (magnetic fluids) کاتالیز (catalysis) ، تصویربرداری رزونانس مغناطیسmagnetic resonance imaging) ) و بازسازی محیط زیست (environmental remediation) دارند توجه پژوهشگران را به خود جلب نموده اند [1]. این نانوذره ها سوپرپارامغناطیس هایی اند که می توانند جذب میدان مغاطیسی شوند اما خ...

Journal: :iranian journal of radiology 0
huseyin ozkurt department of radiology, sisli etfal education and research hospital, istanbul, turkey; department of radiology, sisli etfal education and research hospital, istanbul, turkey. tel: +90-5325958625, fax: +90-2122965467, e-mail:[email protected] firat keskiner department of radiology, sisli etfal education and research hospital, istanbul, turkey ozan karatag department of radiology, canakkale onsekiz mart university faculty of medicine, canakkale, turkey canan alkim department of gastroenterology, sisli etfal education and research hospital, istanbul, turkey sukru mehmet erturk department of radiology, sisli etfal education and research hospital, istanbul, turkey muzaffer basak department of radiology, sisli etfal education and research hospital, istanbul, turkey

background hepatic fibrosis is a typical complication of chronic liver diseases resulting in cirrhosis that remains a major public health problem worldwide. liver biopsy is currently the gold standard for diagnosing and staging hepatic fibrosis. percutaneous liver biopsy; however, is an invasive procedure with risks of complications. therefore, there is need for alternative non-invasive techniq...

Journal: :middle east journal of cancer 0
sedigheh tahmasebi general surgery department, shiraz university of medical sciences, shiraz, iran mohammad hasan hashemizadeh general surgery department, shiraz university of medical sciences, shiraz, iran abdolrasoul talei general surgery department, shiraz university of medical sciences, shiraz, iran sepideh sefidbakht department of radiology, shiraz university of medical sciences, shiraz, iran maral mokhtari department of pathology, shiraz university of medical sciences, shiraz, iran abdolkhalegh keshavarzi general surgery department, shiraz university of medical sciences, shiraz, iran

background : magnetic resonance imaging of the breast is becoming a useful adjunct to mammography and sonography for the detection of breast lesions. however, it is not yet accepted as a routine examination for all breast cancer patients due to the lack of data regarding whether breast magnetic resonance imaging impacts recurrence or survival. this trial examines the use of magnetic resonance i...

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