element for the free particles: $$\begin{aligned}
&& R({\bf
p_{\perp}})=\varphi_{s'}^{+}(A+i\mbox{\boldmath$\sigma$}{\bf
B})\varphi_{s}; \quad A \simeq
\frac{m(\varepsilon+\varepsilon')}{2\varepsilon
\varepsilon'}({\bf e}^{\ast}{\bf u}),
\nonumber \\
&& {\bf B} \simeq \frac{m\omega}{2\varepsilon \varepsilon'}({\bf
e}^{\ast}\times ({\bf n}-{\bf u})); \quad {\bf u}=\frac{{\bf
p}_{\perp}}{m},~\zeta=1+{\bf u}^2,~k'v=q_{min}\zeta,
\label{3.5}\end{aligned}$$ where the vector [**e**]{} describes the photon polarization and the spinors $\varphi_s$ and $\varphi_{s'}$ describe the polarization of the initial and final electrons correspondingly.

In the interval of impact parameters $\varrho \leq \lambda_c$ the expectation value of operator $<\mbox{\boldmath$\varrho$}|M^{+}M|\mbox{\boldmath$\varrho$}>$ cannot be written in the form (\[3.1\]) since the entering operators become noncommutative inside the expectation value. However because of the condition $\lambda_c \ll \sigma$ in this interval $w_r({\bf r}_{\perp}) \simeq w_r({\bf x}) +
O(\frac{\lambda_c}{\sigma})$ one can neglect effect of the inhomogeneous distribution. For the same reason in the calculation of correction to the probability of photon emission, which is defined as the difference of $dw(\sigma)$ and the probability of photon emission in a inhomogeneous medium, one can extend the integration interval into region $\varrho \leq
\varrho_0$.

In this paper we consider the incoherent bremsstrahlung which can be considered as the photon emission due to fluctuations of the potential $V$ connected with uncertainty of a particle position in the transverse to its momentum plane. Because of 