Abstract <p>Classical inversion formulas for the integral Radon transform assume that the integrand is smooth. However, this restriction does not fully correspond to application of results in probing theory, which is the main area of application of the Radon transform. It would be more natural to assume that jump discontinuities are admissible for integrands. The paper presents several inversion formulas proved by the authors for piecewise continuous functions. The formulas are compared, and preliminary recommendations on their use for numerical algorithms are given.</p>