A thyroid scan can show the size, shape, and location of the thyroid gland . It can also find areas of the thyroid gland that are overactive or underactive. The camera takes pictures of the thyroid gland from three different angles. The radioactive tracer used in this test is either iodine or technetium.
The current U.S. Senate has 54 Republicans and 45 Democrats (including one independent). The 2016 Senate election takes place on November 8, 2016. There are 34 seats up in 2016, of which 24 are held by Republicans. Democrats will need to gain 4 or 5 seats to take control.
1 In the Arizona State Senate, there are 12 Democratic incumbents and 18 Republican incumbents. Two incumbents will face primary opposition in the Democratic Party. There is just one primary challenge in the Republican primary.  In the House, there are 24 Democratic incumbents and 36 Republican incumbents.