We study perturbative aspects of noncommutative field theories. This work i
s arranged in two parts. First, we review noncommutative field theories in
general and discuss both canonical and path integral quantization methods.
In the second part, we consider the particular example of noncommutative Ph
i (4) theory in four dimensions and work out the corresponding effective ac
tion and discuss renormalizability of the theory, up to two loops.