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The input of vector data is required at different places. The most important example is kinetic modeling where the plasma and the whole blood curves are time vectors. Another example is quantitative autoradiography whereby a vector contains the table to convert from optical image units to radioactivity density. Such data is expected as a two-column text file in the form below.
sample-time[time_unit] |
value[value_unit] |
0.0 |
0.0 |
1.0 |
27.0 |
2.0 |
123.1 |
... |
... |
Typical time_units are seconds, minutes, and hours. Typical value units are kBq/cc and uCi/cc.
Note: The header line is required - otherwise the values on the first line will be skipped. If valid units are found in the file header the values are converted to the internal representation [sec] and [kBq/cc]. If there are no valid units in the header line, the import procedure assumes that the data units are equal to the ones in the configuration settings of the tool.
Tabular data such as the tissue time-activity curves in kinetic modeling can be loaded from a text file with multiple columns in the form below.
start[time_unit] |
end[value_unit] |
frontal |
temporal |
cerebellum |
0.0 |
10.0 |
0 |
0 |
0 |
10.0 |
20.0 |
12.3 |
13.4 |
7.8 |
20.0 |
30.0 |
28.6 |
31.9 |
15.5 |
... |
... |
... |
... |
... |
Again the header line is required, and the units are considered if they are recognized. Please note that the activity units are defined after the header of the second time column, not after the first value header.
Such files can easily be prepared in text editors, or with MS Excel and saving as a tab delimited text file.