磁共振成像的系统

• Format: Patent
• Language: Chinese
• Published: 09.06.2023
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

本申请提供了用于MRI的系统。该系统包括获取模块和定量测量模块。获取模块可以获取与对象有关的至少两个回波信号，该回波信号可以由施加于对象的磁共振成像脉冲序列激发。定量测量模块可以基于至少两个回波信号对对象进行定量测量。MRI脉冲序列可以包括用于选择性地激发对象中的可交换质子或可交换分子的CEST模块、在CEST模块之后施加的用于激发至少两个梯度回波的RF激发脉冲、以及在RF激发脉冲之后施加的一个或多个回聚脉冲。每个回聚脉冲可以用于激发一个或多个自旋回波。由一个或多个回聚脉冲中的至少一个回聚脉冲激发的一个或多个自旋回波可以包括对称自旋回波和一个或多个非对称自旋回波。 The present disclosure provides a system for MRI. The system may obtain a plurality of echo signals relating to a subject that are excited by an MRI pulse sequence applied to the subject. The system may perform a quantitative measurement on the subject based on the plurality of echo signals. The MRI pulse sequence may include a CEST module configured to selectively excite exchangeable protons or exchangeable molecules in the subject, an RF excitation pulse applied after the CEST module configured to excite a plurality of gradient echoes, and one or more refocusing pulses applied after the RF excitation pulse. Each of the refocusing pulses may be configured to excite one or more spin echoes. The one or more spin echoes excited by