نتایج جستجو برای: internal tumor volume
تعداد نتایج: 949494 فیلتر نتایج به سال:
BACKGROUND Coincidence imaging of low-abundance yttrium-90 (90Y) internal pair production by positron emission tomography with integrated computed tomography (PET/CT) achieves high-resolution imaging of post-radioembolization microsphere biodistribution. Part 2 analyzes tumor and non-target tissue dose-response by 90Y PET quantification and evaluates the accuracy of tumor 99mTc macroaggregated ...
background: the goals of the present research were to investigate the rectal dose during four chosen techniques of cervical cancer radiotherapy and to examine how accurately the treatment planning represents dose measurements, and it’s practicality for routine use as well as, to determine the homogeneity of dose in tumor volume. materials and methods: the study was carried out using a nepton 10...
The purpose of this study is to investigate changes in lung tumor internal target volume during stereotactic body radiotherapy treatment (SBRT) using magnetic resonance imaging (MRI). Ten lung cancer patients (13 tumors) undergoing SBRT (48 Gy over four consecutive days) were evaluated. Each patient underwent three lung MRI evaluations: before SBRT (MRI-1), after fraction 3 of SBRT (MRI-3), and...
background : cutaneous metastasis is defined as the spread of malignant cells from a primary malignancy to the skin. generally, cutaneous involvement from internal malignancies is uncommon. no reports have focused on the cutaneous metastasis profiles in egypt or the middle eastern population. in this study, we seek to determine the rates at which different internal malignancies give rise to cut...
Background: Due to abscopal effect, cell damage may occur outside of the radiation field and the quantification of this effect is one of the most challenging debates in radiation therapy. The aim of this study was to estimate the abscopal effect induced in non-irradiated tumors quantitatively by means of biological effective dose (BED). Materials and Methods: Breast tumors using 4T1 and MC4-L2 ...
the methanolic extracts of indigofera aspalathoides (meia) and wedelia calendulaceae (mewc) were evaluated for their anticancer activity against ehrlich ascites carcinoma (eac) in swiss albino mice. on day 1, the extract of indigofera aspalathoides at a dose of 250 and 500 mg/kg body weight and the extract of wedelia calendulaceae at a dose of 250 and 500 mg/kg body weight were administered ora...
Introduction: Existing phantoms have been constructed based on Caucasian, non-Caucasian and race-specific datasets. According to previous studies made efforts to present Korean- specific phantoms and Chinese female phantom based on CVH dataset due to compare the resulting internal dosimetry with the Caucasian based data showed possible racial difference in human anatomy between ...
BACKGROUND To evaluate pancreatic tumor motion and its dynamics during respiration. METHODS AND MATERIALS This retrospective study includes 20 patients with unresectable pancreatic cancer who were treated with stereotactic ablative radiotherapy. An online respiratory tumor tracking system was used. Periodical maximum and minimum tumor positions with respiration in superior-inferior (SI), late...
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