Abstract: A virtual machine backup method, performed by a first host, includes: capturing a request to write data from a virtual machine to a hard disk image file, wherein the request includes written data and input and output location information, copying the written data to a temporary storage area, calculating a first key of the written data, storing the first key, the input and output location information into a first resource location structure, pausing an operation of the virtual machine and generating a second resource location structure according to the first resource location structure, the first key and a second key, and outputting a backup data set to a second host according to the second resource location structure, wherein the backup data set includes the second resource location structure and only one of existing data and the written data when the first key and the second key are the same.

Abstract: There is disclosed a method for using 123I to radiolabel SnADAM become an serotonin transporter radiotracer(123I -ADAM). At first, there is provided SnADAM solution via mixing SnADAM with ethanol. The SnADAM solution is shaken and further mixed with thin KI solution. The SnADAM solution is mixed with 123I-NH4I solution and H2O2 solution. The SnADAM-123I-NH4I—H2O2 mixture is kept still. Later, the SnADAM solution is mixed with NaHSO3 solution, and the mixture is shaken and further mixed with buffer solution of saturated Na2HPO4. The SnADAM solution is filled in an Accubond C8 column. The Accubond C8 column is washed with sterile water for injection to isolate non-reacting 123I ions. The Accubond C8 column is washed with ethanol, thus providing 123I-ADAM. The 123I-ADAM is blended in normal saline mixture. Millipore Millex GV is used to filter impurities and bacteria from the 123I-ADAM solution.