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Browse 4,817 clinical trials for breast cancer. Find studies that match your criteria and connect with research centers.
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NCT02911155
Background: The field of nuclear medicine has changed a lot in the past decades. Technology has gotten better, so patients are exposed to less radiation. But now workers are doing procedures more often and using lead aprons less. So they may be exposed to more radiation. This may put them at higher risk for cancers and other health problems that are related to radiation. Researchers want to collect data from technologists to learn more about the risks and appropriate doses of radiation. Objective: To learn more about the risks and appropriate doses of radiation for nuclear medicine technologists. Eligibility: Adults who were first certified in nuclear medicine technology in the United States after 1980. They must be living in the United States. They must not be participants in the USRT study. Design: Participants will be recruited online. Participants will complete an online survey. It will take about a half hour. This will have questions about their work with nuclear medicine procedures. There will be questions about the kinds of procedures and how often they do them. Participants will give a short work history. This will include the names of current and past employers. Participants will allow researchers to get records of their film badge dose readings. These will come from dosimetry providers. Dosimetry data will not be shared with participants. Researchers can t ensure the how accurate or complete the data are.
NCT00341315
This study will collect information on the height and weight of women who participated in a 1998 study in Triana, Alabama, on the risk of breast cancer and benign breast disease in relation to environmental exposure to the pesticide DDT and similar chemicals. This additional information is needed to calculate the participants' body mass index (BMI), which is required for completing analysis of the data. The 1998 study-a collaborative effort of the National Cancer Institute, the Triana Area Medical Fund, and the College of Nursing at the University of Alabama at Huntsville-investigated possible effects of DDT and other compounds on the risk of breast cancer, predominantly among African-American women in the area of Triana, Alabama. The study was initiated as a result of medical findings showing high blood levels of DDT among the local population who had consumed fish from a tributary of the Tennessee River that had been polluted by the discharge over several decades of large quantities of pesticides from a DDT production plant. Women participating in the study had a mammogram, physical examination, breast examination, and blood draw, and completed a questionnaire on diet and lifestyle factors. In order to complete analysis of the data and determine whether there is an association between environmental exposure to DDT and related chemicals and breast cancer risk, additional information on BMI is required.