Megabecquerel
Megabecquerel (MBq) is a unit of radioactivity used in the International System of Units (SI). It is named after the French physicist Henri Becquerel, who shared a Nobel Prize in Physics for the discovery of radioactivity. One megabecquerel is equal to one million becquerels.
Definition[edit | edit source]
The megabecquerel is defined as one million disintegrations or transformations per second. This unit is used to measure the activity of a radioactive source, and is based on the number of nuclei that decay and emit ionizing radiation per second.
Usage[edit | edit source]
In nuclear medicine, the megabecquerel is commonly used to express the activity of radiopharmaceuticals. For example, a typical dose for a thyroid scan using iodine-131 might be 185 MBq, while a treatment dose for hyperthyroidism might be several thousand MBq of iodine-131.
Conversion[edit | edit source]
The megabecquerel is part of the International System of Units and is therefore used worldwide. However, in the United States, the older unit curie (Ci) is still often used. The conversion factor is 1 Ci = 37,000,000 MBq or 37 GBq.
See also[edit | edit source]
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