The Bessel. distribution, one of the Cohen’s class time-frequency distributions, has been reported, in many application areas and particularly on biomedical signal processing, as an efficient spectral estimator. Its usage on practical applications has been deprecated due to its computational burden. This paper presents a Bessel distribution algorithm and the results of its implementation on a variety of commercial off-the-self personal computers. The analysis of these results indicate that the Bessel distribution may no longer be put aside for real-time applications. It is demonstrated that the real-time estimation of pulsed Doppler blood flow spectral parameters is achievable.