QA and QC phantom for separated or simultaneous measurement of PET and MRI molecular imaging

Abstract

The invention discloses a QA (quality assurance) and QC (quality control) phantom for separated or simultaneous measurement of PET (positron emission tomography) and MRI (magnetic resonance imaging) molecular imaging, aiming at solving a problem of the prior art that QA and QC measurement of PET and MRI molecular imaging apparatuses cannot be simultaneously implemented. According to the scheme, the phantom comprises a base body, wherein an isolating section is arranged in the middle of the base body; an MRI section, which is used for conducting QA and QC measurement of MRI, is arranged at oneside of the isolating section, and PET section, which is used for conducting QA and QC measurement, is arranged at the other side; an MRI imaging locating plugin, an MRI spatial resolution test plugin, an MRI layer thickness test plugin, an MRI spatial geometric distortion test plugin, an MRI low-contrast test plugin, a PET signal interference layer and an MRI imaging uniformity and signal-to-noise ratio part are arranged in the MRI section; a PET spatial resolution test plugin, PET-MRI imaging locating plugin, a PET lesion sensitivity test plugin, a PET tissue and organ absorptivity test plugin and a PET imaging uniformity and signal-to-noise ratio part are arranged in the PET section.

Description

technical field [0001] The present invention relates to the field of phantoms, in particular to QA and QC phantoms for separate or simultaneous measurements of PET (Positron Annihilation Imaging) and MRI (Magnetic Resonance) molecular imaging. Background technique [0002] Modern medical clinical diagnosis requires medical imaging technology. Imaging techniques have evolved from unimodal tissue imaging to multimodal molecular imaging. Multimodal molecular imaging technologies such as PET / CT and PET / MRI have gradually entered the clinic, such as early tumor diagnosis. However, the theory, methods and corresponding equipment and phantoms of multi-modality imaging, especially the imaging quality control (QC) and quality assurance (QA) of molecular imagers are still in the initial discussion stage. For example, an affiliated organization of the American College of Radiology: the American College of Radiology (ACR) has corresponding QA and QC standards and corresponding phantom...

AI Technical Summary

Problems solved by technology

[0005] The QA and QC phantoms measured by multimodal PET and MRI imagers at the same time can use two separate phantoms, but the QA and QC phantoms of multimodal simultaneous PET and MRI imaging are not applicable to the above single The simple splicing of the modalities can be used, because such a phantom has no information about the alignment of PET and MRI imaging pixels (that is, spatial alignment), and it also lacks information about the interference of PET signal sources on MRI measurements, and there is no information related to MRI measurement. The human body uses bionic materials with similar absorption in PET imaging, and multiple single measurements are performed, the measurement speed is slow, and the measurement results are also greatly affected

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