The needle assembly is provided with the housing, an IV cannula for accessing a blood vessel and a non-patient cannula for communication with an evacuated tube. The photothermographic material comprises at least a non-photosensitive silver salt, a photosensitive silver halide, a binder and a reducing agent, wherein a silver iodide content of the photosensitive silver halide is 40% by mole or more. Then, a classifier associated with the selected engine is used to analyze unknown sample data, create category predictions and produce forecast reports based on the predictions.