نتایج جستجو برای: magnetic resonance imaging denoising

تعداد نتایج: 745036  

Journal: :مجله دانشکده پزشکی دانشگاه علوم پزشکی تهران 0
عباس تکاور a takavar

basic physical principles of nuclear magnetic resonance imaging (n.m.r.i), a nonionizing medical imaging technique, are described. principles of nmri with other conventional imaging methods, ie, isotope scanning, ultrasonography and radiography have been compared. t1 and t2 and spin density (s.d.) factors and different image construction techniques based on their different combinations is discu...

Journal: :journal of cardio-thoracic medicine 0
giordano rafael tronco alves junior researcher, post-graduation program in medicine (radiology) at the federal university of rio de janeiro, 21941-901, rio de janeiro, brazil natália henz concatto assistant physician, division of radiology, general hospital at the university of caxias do sul, 95070-560, caxias do sul, brazil deborah harrington cardiac surgeon and consultant radiologists, department of cardiac surgery and department of radiology, liverpool heart and chest hospital nhs foundation trust, liverpool, l14 3pe, liverpool, united kingdom caroline mccann cardiac surgeon and consultant radiologists, department of cardiac surgery and department of radiology, liverpool heart and chest hospital nhs foundation trust, liverpool, l14 3pe, liverpool, united kingdom bruno hochhegger radiologist, department of radiology, federal university of health sciences of porto alegre, 90020-090, porto alegre, brazil klaus irion cardiac surgeon and consultant radiologists, department of cardiac surgery and department of radiology, liverpool heart and chest hospital nhs foundation trust, liverpool, l14 3pe, liverpool, united kingdom

brachial plexus injury (bpi) is an uncommon complication of median sternotomy capable of causing a permanent or transitory sensitivity and/or motor function impairment in the upper limbs. during a cardiac surgery through sternotomy, for the assessment of the thoracic cage configuration and the site of mediastinal structures, a broader surgical field may be required. if the sternal retractors ar...

Journal: :iranian journal of neurology 0
nasim tabrizi department of neurology, school of medicine, mazandaran university of medical sciences, sari, iran. mahmoud abedini department of neurology, school of medicine, mazandaran university of medical sciences, sari, iran.

no abstract

Journal: :iranian journal of neurology 0
güliz yılmaz department of radiology, school of medicine, near east university, nicosia, north cyprus, turkey. süha akpınar department of radiology, school of medicine, near east university, nicosia, north cyprus, turkey.

no abstract

Journal: :iranian journal of medical physics 0
hadis alvankar golpaygan neuro imaging and analysis group (niag), research center for molecular and cellular imaging (rcmci), tehran university of medical sciences, tehran, iran mohammad ali oghabian neuro imaging and analysis group (niag), research center for molecular and cellular imaging (rcmci), tehran university of medical sciences, tehran, iran seyed amir hossein batouli neuro imaging and analysis group (niag), research center for molecular and cellular imaging (rcmci), tehran university of medical sciences, tehran, iran arash zare sadeghi department of medical physics and biomedical engineering, faculty of medicine, tehran university of medical science, tehran, iran

introduction quantitative susceptibility mapping (qsm) is a new contrast mechanism in magnetic resonance imaging (mri). the images produced by the qsm enable researchers and clinicians to easily localize specific structures of the brain, such as deep brain nuclei. these nuclei are targets in many clinical applications and therefore their easy localization is a must. in this study, we aimed to i...

Journal: :acta medica iranica 0
payam sarraf department of neurology, faculty of medicine, tehran university of medical sciences, tehran, iran. mahsa ghajarzadeh department of neurology, brain and spinal injury research center, tehran university of medical sciences, tehran, iran. babak salarian department of neurology, tehran university of medical sciences, tehran, iran.

creutzfeldt-jacob disease is a prion disease which has a wide range of clinical presentations. its diagnosis is not simple and clinical manifestation along with eeg, mr imaging findings and cerebrospinal fluid (csf) analysis should be considered for a definite diagnosis. a-50-year-old woman referred with cognitive impairment, myoclonic jerks, mutism and difficulty in swallowing to our clinic. e...

Journal: :the journal of tehran university heart center 0
zahra alizadeh-sani shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t shabnam madadi shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t anita sadeghpour shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t zahra khajali shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t pedram golnari shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t majid kiavar shaheed rajaei cardiovascular, medical and research center, tehran university of medical sciences, t

left ventricular non-compaction cardiomyopathy is a rare congenital cardiomyopathy that affects both children and adults. since the clinical manifestations are not sufficient to establish diagnosis, echocardiography is the diagnostic tool that makes it possible to document ventricular non-compaction and establish prognostic factors. we report a 47-year-old woman with a history of dilated cardio...

Journal: :iranian journal of radiology 0
yanhong xu department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china an xiao department of interventional radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china jia yang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china zaixian zhang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china guixiang zhang department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china; department of radiology, shanghai first people’s hospital, school of medicine, jiao tong university, shanghai, china. tel: +86-2163240090, fax: +86-2163240825

conclusion the study data highlighted good value of iodine-based material decomposition images of spectral ct in assessment of both lipiodol deposition and residual cancer for follow-up of hcc patients previously treated with tace. background it is critical to follow up hepatocellular carcinoma (hcc) after transcatheter arterial chemoembolization (tace) in clinical practice. computed tomography...

Journal: :iranian journal of radiology 0
mahmood nazarpoor department of radiology, faculty of paramedicine, tabriz university of medical sciences, iran +98-4113368733, [email protected]; department of radiology, faculty of paramedicine, tabriz university of medical sciences, iran +98-4113368733, [email protected] masoud poureisa department of radiology, faculty of medicine, tabriz university of medical sciences, iran mohammad hossein daghighi department of radiology, faculty of medicine, tabriz university of medical sciences, iran

conclusion using standard imaging parameters, each mri sequence reaches its maximum si in a specific contrast concentration, which is highest in se and least in ir in a comparison between se, fse and ir sequences. results this study shows that maximum si will appear at different ranges in different sequences. the maximum si can be seen at concentrations of 5.95, 4.96 and 3.98mmol/l for se, fse ...

Journal: :iranian journal of cancer prevention 0
donya farrokh dept. of radiology, imam reza hospital, mashad university of medical sciences, mashad, iran mahboobeh abedi dept. of radiology, imam reza hospital, mashad university of medical sciences, mashad, iran yalda fallah rastegar dept. of surgery, shariaty hospital, mashad university of medical sciences, mashad, iran

intracystic carcinoma of the breast is a rare form of breast carcinoma. among all malignant breast tumors, this lesion has an incidence of 0.2-0.5%. these neoplasms have certain characteristic imaging findings which help to differentiate these lesions from other focal breast abnormalities. this report is on the case of a 48-year-old woman with a palpable, painless lump in her right breast. mamm...

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