Phantom for Measuring Detective Quantum Efficiency of Computed Tomography and Method Using Thereof

摘要

The present invention relates to a phantom for measuring the quantum detection efficiency in tomography and a method for measuring the quantum detection efficiency using the same. A step B for obtaining a modulation transfer function from the phantom side irradiated with X-rays in the step A; A step C for obtaining a noise power spectrum from the phantom side irradiated with X-rays in the step A; A step D for obtaining the total number of input photons from the phantom side irradiated with X-rays in the step A; And an E step of obtaining the quantum detection efficiency from the modulation transfer function obtained in step B, the noise power spectrum obtained in step C, and the total input photon number obtained in step D; It is possible to measure the spatial resolution and the noise level of the CT system together through one scan, thereby reducing the cost and time required for the comprehensive performance evaluation of the CT system .;