primary radiation


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Related to primary radiation: secondary radiation, Scattered radiation

primary radiation

[′prī‚mer·ē ‚rād·ē′ā·shən]
(physics)
Radiation arriving directly from its source without interaction with matter.
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Stage 1 or Stage II Stage III or Stage IV Recurrent Unimodality Multimodality Primary Radiation Primary radiation with Primary radiation concurrent platinum-based or reirradiation chemotherapy or cetuximab Typically used for Organ sparing approaches For patients with laryngeal and Typically used for unresectable pharyngeal tumors laryngeal and pharyngeal locoregional tumors recurrence Adjuvant radiation in the Postoperative postoperative setting irradiation or reirradiation Typically for surgically After salvage surgery resected head and neck cancer with regional disease Adjuvant chemoradiation with cisplatin in the postoperative setting Typically for surgically resected head and neck cancer with high risk features (eg.
While Dr Ramana explained that he believes the primary radiation threat continues to be mostly for residents living within 50km of the plant, he also added: "There are going to be areas outside of the Japanese government's 20km mandatory evacuation zone where radiation is higher.
But in fact, UVA radiation, the primary radiation emitted by tanning lamps, can be 10 to 15 times more intense than the sun at mid-day.
Energy dispersive x-ray fluorescence analysis (EDXRFA) is based on the physical principle of the primary radiation of an X-ray tube exciting a sample to emit X-ray fluorescence radiation.
Such a finding would point to the need for adjuvant radiation along with surgery, in which case he might choose primary radiation with hormone therapy instead.