Body mold for a magnetic resonance imaging system
Provided in embodiments of the present invention are a body mold, a magnetic resonance imaging system, and a main magnetic field evaluation method and a gradient field evaluation method therefor. The body mold comprises a plurality of substrates, wherein the plurality of substrates are sequentially arranged to form a multi-layer structure in a three-dimensional space. Each substrate is provided with a plurality of first accommodation bodies for accommodating first resonant volumes and a plurality of second accommodation bodies for accommodating second resonant volumes. The plurality of first accommodation bodies and the plurality of second accommodation bodies are arranged at intervals. The first resonant volumes and the second resonant volumes have different longitudinal relaxation times T 1.
1 . A system comprising:
a body mold for a magnetic resonance imaging system, comprising a plurality of substrates, wherein the plurality of substrates are sequentially arranged to form a multi-layer structure in a three-dimensional space; each substrate is provided with a plurality of first accommodation bodies that accommodate first resonant objects and a plurality of second accommodation bodies that accommodate second resonant objects, the plurality of first accommodation bodies and the plurality of second accommodation bodies are arranged at intervals, the first resonant objects and the second resonant objects are alternately arranged relative to each other in both a longitudinal direction and a transverse direction that is transverse to the longitudinal direction, and the first resonant objects and the second resonant objects have different longitudinal relaxation times T 1 , wherein when excited by a radio frequency, the first resonant objects and the second resonant objects generate detectable magnetic resonance signals; and
wherein the plurality of substrates are sequentially arranged at specific angles to form the multi-layer structure having a fan-shaped cross-section.
2 . The body mold according to claim 1 , wherein the first resonant objects comprise a first liquid, and the second resonant objects comprise a second liquid.
3 . The body mold according to claim 2 , wherein the first liquid and the second liquid have different compositions.
4 . The body mold according to claim 2 , wherein the first liquid and the second liquid are solutions having different concentrations.
5 . The body mold according to claim 2 , wherein two adjacent first accommodation bodies are different in at least one of the following: shape and size.
6 . The body mold according to claim 2 , wherein two adjacent second accommodation bodies are different in at least one of the following: shape and size.
7 . The body mold according to claim 1 , wherein the angle between two substrates of the body mold farthest from each other is 180 degrees.
8 . The body mold according to claim 1 , wherein the body mold further comprises a first carrying element and a second carrying element for carrying the plurality of substrates, and two ends of each substrate are detachably connected to the first carrying element and the second carrying element respectively.