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Optoacoustic imaging is a hybrid technique with a rapid evolution within the area of biomedical imaging. It combines the rich and versatile optical contrast with the high spatial resolution associated with the low-dispersion ultrasonic wave propagation nature. Its application raises a series of difficult problems that require further developments. One of them, the objective of this work, is to analyze how the optoacoustic image reconstruction algorithms are affected by the use of non-ideal (real) broadband sensors. In particular, as an original contribution, we study the case of integrating ultrasonic sensors based on piezoelectric polymer thin films. In order to achieve this, a temporary back-projection algorithm was implemented for line detectors. Then, using a parametric model for this type of sensors, we studied the influence of the use of a real device on the efficiency of the implemented algorithm.