نتایج جستجو برای: photon

تعداد نتایج: 70717  

Journal: :International Journal of Modern Physics: Conference Series 2017

Journal: :research in cardiovascular medicine 0
hadi malek rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran raheleh hedayati department of nuclear medicine, rasool-e-akram hospital, iran university of medical sciences, tehran, ir iran nahid yaghoobi rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran; department of nuclear medicine and molecular imaging, rajaie cardiovascular medical and research center, vali-asr st., niayesh blvd. tehran, ir iran. p. o. box: 1996911151, tel: +98-9121031582, fax: +98-2122042026 ahmad bitarafan-rajabi rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran seyed hassan firoozabadi rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran feridoon rastgou rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, ir iran

background subdiaphragmatic activity can produce subdiaphragmatic-related artifacts, which can degrade the quality of myocardial perfusion imaging (mpi). objectives we examined the impact of drinking milk, water, and lemon juice on different subdiaphragmatic-related artifacts by using 99mtc-sestamibi myocardial single-photon emission computed tomography (spect) in order to determine a feasible ...

Journal: :asia oceania journal of nuclear medicine and biology 0
yangchun chen nuclear medicine department of quanzhou first hospital affiliated fujian medical university sipei xie ultrasound department of quanzhou first hospital affiliated fujian medical university fang he endocrine department of quanzhou first hospital affiliated fujian medical university jianwei chen nuclear medicine department of quanzhou first hopital affiliated fujian medical university

objective(s): in this study, we aimed to evaluate the efficacy of thyroid volume measurement using 99mtc pertechnetate single-photon emission computed tomography (spect) images, acquired by the standardized uptake value (suv)-shape scheme designed by our expert team.methods: a total of 18 consecutive patients with graves’ disease (gd) were subjected to both ultrasonographic and 99mtc pertechnet...

Journal: :the journal of tehran university heart center 0
atefe esmaili research institute for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran. saeed farzanefar department of nuclear medicine, vali-asr hospital, tehran university of medical sciences, tehran, iran. alireza emami-ardakani research institute for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran. mehrshad abbasi department of nuclear medicine, vali-asr hospital, tehran university of medical sciences, tehran, iran.

background: the implications of cardiac risk stratification before orthotopic liver transplantation (olt) are not well established. we studied the usefulness of myocardial perfusion imaging (mpi) in this scenario. methods: mpi data of 24 patients (9 females), candidates of olt, were collected. they underwent mpi as part of their preoperative risk assessment. mpis were interpreted by 2 nuclear p...

Journal: :iranian journal of medical physics 0
nasrollah jabbari assistant professor, medical imaging dept., urmia university of medical sciences, urmia, iran. bijan hashemi associate professor, medical physics dept., tarbiat modarres university, tehran, iran.

introduction: in clinical electron beams, most of bremsstrahlung radiation is produced by various linac head structures. this bremsstrahlung radiation dose is influenced by the geometry and construction of every component of the linac treatment head structures. thus, it can be expected that the amount of the contaminated photon dose due to bremsstrahlung radiation varies among different linacs,...

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