نتایج جستجو برای: photon
تعداد نتایج: 70717 فیلتر نتایج به سال:
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 ...
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...
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...
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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