  The CGI (CGI) has the potential of low cost, low dose, and high resolution,
which is very attractive for the development of radiation imaging field.
However, many sub-coding plates must be used in the modulation process, which
greatly affects the development of CGI technology. In order to reduce the
coding plates, we refer to the rotation method of computed tomography (CT),
then propose a novel CGI method based on rotational modulation method of a
single-column striped coding plate. This method utilizes the spatial variation
of a single sub-coding plate (rotation) to realize multiple modulation of the
ray field and improves the utilization rate of a single sub-coding plate.
However, for this rotation scheme of CGI, the traditional binary modulation
matrix is no longer applicable. To obtain the system matrix of the rotated
striped coding plate, an area model based on beam boundaries is established.
Subsequently, numerical and Monte Carlo simulations were conducted. The results
reveal that our scheme enables high-quality imaging of N*N resolution objects
using only N sub-coding plates, under both full-sampling and under-sampling
scenarios. Moreover, our scheme demonstrates superiority over the Hadamard
scheme in both imaging quality and the number of required sub-coding plates,
whether in scenarios of full-sampling or under-sampling. Finally, an {\alpha}
ray imaging platform was established to further demonstrate the feasibility of
the rotational modulation method. By employing our scheme, a mere 8 sub-coding
plates were employed to achieve CGI of the radiation source intensity
distribution, achieving a resolution of 8*8. Therefore, the novel ray CGI based
on rotational modulation method can achieve high-quality imaging effect with
fewer sub-coding plates, which has important practical value and research
significance for promoting single-pixel radiation imaging technology.
