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https://www.readbyqxmd.com/read/28397060/monte-carlo-simulation-of-the-rbe-of-i-131-radiation-using-dna-damage-as-biomarker
#1
Ahad Ollah Ezzati, Ali Mahmoud-Pashazadeh, Matthew T Studenski
In general, a weighting factor of one is applied for low linear energy transfer radiations. However, several studies indicate that relative biological effectiveness (RBE) of low energy photons and electrons is greater than one. The aim of this current study was calculating the RBE of I-131 radiation relative to Co-60 gamma photons in 100 μm spheroid cells using Monte Carlo (MC) simulations. These calculations were compared to experimentally measured results. MCNPX2.6 was used to simulate the I-131 and Co-60 irradiation setups and calculate the secondary electron spectra at energies higher than 1 keV with varying oxygen concentrations...
April 10, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28385792/fixed-100-mci-i-131-activity-for-metastatic-thyroid-cancer-therapy-ignores-science-and-history
#2
Walter Jentzen, Alan E Nahum, Andreas Bockisch, Ina Binse, Mark Tulchinsky
No abstract text is available yet for this article.
April 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28368520/risk-of-thyroid-nodules-in-residents-of-belarus-exposed-to-chernobyl-fallout-as-children-and-adolescents
#3
Elizabeth K Cahoon, Eldar A Nadirov, Olga N Polanskaya, Vasilina V Yauseyenka, Ilya V Velalkin, Tamara I Yeudachkova, Tamara I Maskvicheva, Victor F Minenko, Wayne Liu, Vladimir Drozdovitch, Kiyohoko Mabuchi, Mark P Little, Lydia B Zablotska, Robert J McConnell, Maureen Hatch, Kamau O Peters, Alexander V Rozhko, Alina V Brenner
Context: Although radiation exposure is an important predictor of thyroid cancer upon diagnosis of a thyroid nodule, the relationship between childhood radiation exposure and thyroid nodules has not been comprehensively evaluated. Objective: To examine the association between internal I-131 thyroid radiation dose and thyroid nodules in young adults exposed during childhood. Design, setting, and participants: In this cross-sectional study, we screened 11,970 residents of Belarus aged ≤18 years at the time of the Chernobyl nuclear accident (April 1986) for thyroid disease (median age 21 years) with thyroid palpation, ultrasonography, blood and urine analysis, and medical follow-up when appropriate...
March 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28340756/simultaneous-quantification-of-iodine-and-high-valent-metals-via-icp-ms-under-acidic-conditions-in-complex-matrices
#4
Kristina Brix, Christina Hein, Jonas Michael Sander, Ralf Kautenburger
The determination of iodine as a main fission product (especially the isotopes I-129 and I-131) of stored HLW in a disposal beside its distribution as a natural ingredient of many different products like milk, food and seawater is a matter of particular interest. The simultaneous ICP-MS determination of iodine as iodide together with other elements (especially higher valent metal ions) relevant for HLW is analytically very problematic. A reliable ICP-MS quantification of iodide must be performed at neutral or alkaline conditions in contrast to the analysis of metal ions which are determined in acidic pH ranges...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28326838/ctla-4-gene-polymorphisms-associate-with-efficacy-of-postoperative-radioiodine-131-for-differentiated-thyroid-carcinoma
#5
De-Feng Chang, Xiao-Hong Chen, Jing Huang, Ya-Mei Sun, Da-Yong Zhu, Zhong-Qing Xu
AIM: To investigate the association of CTLA-4 polymorphisms with efficacy of postoperative radioiodine-131 (I-131) treatment for differentiated thyroid carcinoma (DTC). METHODS: A total of 324 DTC patients and 350 healthy individuals were enrolled in our study. Patients received I-131 remnant ablation following surgical resection. Based on the treatment efficacy, patients were divided into the effective (n = 183) and ineffective groups (n = 141). CTLA-4 polymorphisms (+49A>G, CT60A>G and -318C>T) were genotyped by polymerase chain reaction-restriction fragment length polymorphism...
March 3, 2017: Future Oncology
https://www.readbyqxmd.com/read/28291381/selimetry-a-multicentre-i-131-dosimetry-trial-a-clinical-perspective
#6
Jonathan Wadsley, Rebecca Gregory, Glenn Flux, Kate Newbold, Yong Du, Laura Moss, Andrew Hall, Louise Flanagan, Sarah R Brown
Treatment options for patients with thyroid cancer that is no longer sensitive to iodine therapy are limited. Those treatments which currently exist are associated with significant toxicity. The SELIMETRY trial (EudraCT No 2015-002269-47) aims to investigate the role of the MEK inhibitor Selumetinib in re-sensitising advanced iodine refractory differentiated thyroid cancer to radioiodine therapy. Patients deemed to have sufficient iodine uptake in previously iodine refractory lesions after 4 weeks of Selumetinib therapy will be given an empirical activity of 5...
March 14, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28255354/radionuclide-i-131-labeled-albumin-paclitaxel-nanoparticles-for-synergistic-combined-chemo-radioisotope-therapy-of-cancer
#7
Longlong Tian, Qian Chen, Xuan Yi, Guanglin Wang, Jie Chen, Ping Ning, Kai Yang, Zhuang Liu
Development of biocompatible/biodegradable materials with multiple functionalities via simple methods for cancer combination therapy has attracted great attention in recent years. Herein, paclitaxel (PTX), a popular anti-tumor chemotherapeutic drug, is used to induce the self-assembly of human serum albumin (HSA) pre-labeled with radionuclide I-131, obtaining (131)I-HSA-PTX nanoparticles for combined chemotherapy and radioisotope therapy (RIT) of cancer. Such (131)I-HSA-PTX nanoparticles show prolonged blood circulation time, high tumor specific uptake and excellent intra-tumor penetration ability...
2017: Theranostics
https://www.readbyqxmd.com/read/28250909/retrospective-biological-dosimetry-at-low-and-high-doses-of-radiation-and-radioiodine-impact-on-individual-susceptibility-to-ionizing-radiation
#8
Antonina Cebulska-Wasilewska, Mateusz Krzysiek, Grażyna Krajewska, Artur Stępień, Paweł Krajewski
Iodine-131 (I-131) is often used in thyroid diagnostics and therapy. External and internal exposure to radioiodine can lead to molecular and cellular damage in peripheral blood lymphocytes. The aim of this study was to explore the influence of low and high doses of I-131 on susceptibility to ionizing radiation. Study groups consisted of 30 individuals free of thyroid diseases, 41 patients exposed diagnostically to low doses of I-131, and 37 hyperthyroidism patients exposed therapeutically to high doses. The standardized DNA repair competence assay was used to test the efficacy of the fast DNA repair process in G0 cells...
2017: Genome Integrity
https://www.readbyqxmd.com/read/28246564/false-positive-findings-on-i-131-wbs-and-spect-ct-in-patients-with-history-of-thyroid-cancer-case-series
#9
Zeina C Hannoush, Juan D Palacios, Russ A Kuker, Sabina Casula
Introduction. Although whole body scan (WBS) with I-131 is a highly sensitive tool for detecting normal thyroid tissue and metastasis of differentiated thyroid cancer (DTC), it is not specific. Additional information, provided by single photon emission computed tomography combined with X-ray computed tomography (SPECT/CT) and by the serum thyroglobulin level, is extremely useful for the interpretation of findings. Case Presentation. We report four cases of false positive WBS in patients with DTC: ovarian uptake corresponding to an endometrioma, scrotal uptake due to a spermatocele, rib-cage uptake due to an old fracture, and hepatic and renal uptake secondary to a granuloma and simple cyst, respectively...
2017: Case Reports in Endocrinology
https://www.readbyqxmd.com/read/28237001/radioiodine-therapy
#10
REVIEW
Markus Luster, Andreas Pfestroff, Heribert Hänscheid, Frederik A Verburg
Radioiodine therapy for benign and malignant thyroid disease rose at the birth of nuclear medicine. Since then, this procedure has been performed countless of times in adult and in pediatric patients alike, and has contributed to a normalization of life expectancy in all but I-131 refractory differentiated thyroid cancer (DTC) cases. As (131)I therapy in children is almost exclusively given for DTC, this review of radioiodine therapy in children focuses on patients with malignant thyroid disease. The aim of the present review is to provide an overview of the indications, practical execution, and controversies surrounding (131)I therapy for malignant tumors in pediatric patients...
March 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28228903/i-131-uptake-in-fat-necrosis-of-the-breast
#11
Malak Itani, David H Lewis
I-131 uptake in the breast has been described with a variety of normal and pathologic conditions. We present the case of a 38-year-old female who received 317 millicuries of radioactive I-131 treatment for papillary thyroid carcinoma. Post-treatment scan demonstrated I-131 uptake in an area of fat necrosis in the breast.
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28217014/antithyroglobulin-antibody-as-a-marker-of-successful-ablation-therapy-in-differentiated-thyroid-cancer
#12
Ayu Rosemeilia Dewi, Budi Darmawan, Achmad Hussein Sundawa Kartamihadja, Basuki Hidayat, Johan S Masjhur
The aim of this study was to determine the role of antithyroglobulin antibody (ATA) serum as a marker of successful I-131 ablation therapy in differentiated thyroid cancer (DTC) patients with low serum thyroglobulin (Tg). A retrospective study was conducted on 60 patients (10 males and 50 females). All patients underwent posttotal thyroidectomy and received 2.96 to 3 GBq I-131 ablation. Subjects were divided into two groups with succesful and unsuccessful I-131 ablation therapies. The data of age, gender, histopathologic type, tumor size, and metastasis were collected...
January 2017: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28209908/prescribed-activities-of-i-131-therapies-in-differentiated-thyroid-cancer-invited-commentary
#13
Douglas Van Nostrand
No abstract text is available yet for this article.
February 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28187334/regional-and-global-contributions-of-anthropogenic-iodine-129-in-monthly-deposition-samples-collected-in-north-east-japan-between-2006-and-2015
#14
Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Yoshihito Ohtsuka, Shun'ichi Hisamatsu
We measured the monthly atmospheric deposition flux of (129)I at Rokkasho, Aomori, Japan-the location of a commercial spent nuclear fuel reprocessing plant-from 2006 to 2015 to assess the impact of the plant on environmental (129)I levels. The plant is now under final safety assessment by a national authority after test operation using actual spent nuclear fuel. During cutting and chemical processing in test operations from April 2006 to October 2008, (129)I was discharged to the atmosphere and detected in our deposition samples...
May 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28163939/isolated-liver-metastasis-in-h%C3%A3-rthle-cell-thyroid-cancer-treated-with-microwave-ablation
#15
Konstantinos Segkos, Carl Schmidt, Fadi Nabhan
Hürthle cell thyroid cancer (HCTC) is a less common form of differentiated thyroid cancer. It rarely metastasizes to the liver, and when it does, the metastasis is almost never isolated. Here we report a 62-year-old male with widely invasive Hürthle cell thyroid cancer, who underwent total thyroidectomy and received adjuvant treatment with I-131 with posttreatment scan showing no evidence of metastatic disease. His thyroglobulin however continued to rise after that and eventually an isolated liver metastasis was identified...
2017: Case Reports in Endocrinology
https://www.readbyqxmd.com/read/28160320/utility-of-i-124-pet-ct-in-identifying-radioiodine-avid-lesions-in-differentiated-thyroid-cancer-a-systematic-review-and-meta-analysis
#16
REVIEW
Prasanna Santhanam, David Taieb, Lilja Solnes, Wael Marashdeh, Paul W Ladenson
INTRODUCTION: Diagnostic I-123 scans have been shown to underestimate the disease burden in differentiated thyroid cancer (DTC) when compared to I-131 post-treatment scans, especially in children and patients who have had prior radioiodine (RAI) therapy and/or distant metastasis. I-124 PET/CT has been shown to be highly effective in imaging DTC-related metastatic disease. METHODS: We performed a systematic review and meta-analysis of studies investigating the sensitivity and specificity of I-124 PET/CT in identifying lesions amenable to RAI therapy as confirmed by I-131 post-treatment scanning...
February 3, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28133242/-effectiveness-of-lenvatinib-for-thyroid-cancer-with-lung-metastases-report-of-a-case
#17
Saki Nagashima, Sadanori Matsuo, Mayumi Takahashi, Yasuko Umemoto, Tomohiro Hirano, Katsuhisa Enomoto, Kenichi Sakurai, Sadao Amano
A 73-year-old woman visited our hospital 1 year 4 months ago because of multiple lung masses that were incidentally detected on CT. We subsequently conducted a whole body examination. Ultrasonography revealed multiple masses in her thyroid. We performed fine needle aspiration biopsy cytology(ABC), and the cytological diagnosis was papillary carcinoma. Total thyroidectomy and modified radical neck dissection were performed. Two months after the operation, cervical lymph nodes were enlarged, and she received I -131 radioisotope therapy...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28048806/su-g-iep4-05-experience-with-a-practical-approach-to-the-release-of-radioactive-patients-from-radiation-safety-isolation
#18
R Wendt, W Erwin, A Fisher, S Jones, S Jimenez, F Wong, A Jessop
PURPOSE: The radioactive patient releases of the nuclear medicine department in a large cancer center were analyzed to compare the estimated doses to others to the regulatory limit and institutional targets and to gauge how onerous the patients' instructions were. METHODS: In-house software that implements the NUREG 1556 approach and further considers fellow travelers, children and pregnant women and members of the public following Siegel, et al., is used to calculate release timing and to provide patients with individualized instructions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048640/su-f-t-222-dose-of-fetus-and-infant-following-accidental-intakes-of-i-131-by-the-mother
#19
Y Wang, P Hu
PURPOSE: To estimate the calculation of absorbed dose to the fetus and infants from intakes of I-131 by the mother. Thus provide some advice to the radioprotection of radioactive accident. METHODS: In this clinical case, a staff of nuclear medicine accidently intake I-131 during (10-12 weeks) and after pregnancy. The infant was born at full term, but both lobes of the thyroid gland were found to be absent (bilobar thyroid agenesis). It was suspected that the fetal thyroid agenesis may be related with mother's contamination of I-131 during pregnancy...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28010790/50-years-ago-in-the-journal-of-pediatrics-the-diagnosis-of-complete-extrahepatic-obstruction-by-rose-bengal-i-131
#20
Anna L Peters
No abstract text is available yet for this article.
January 2017: Journal of Pediatrics
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