Coil for magnetic resonance imager

Abstract

With the objective of reducing the coupling capacitance of a pattern crossing section in a simple structure thereby to produce a high-quality tomographic image based on a larger value of the coil, a magnetic resonance signal receiving coil includes a pair of first and second conductor patterns each having a partial conductor pattern set which branches into three partial conductor patterns at the pattern crossing section. Each confronting pair of the first and second partial conductor patterns cross each other by being insulated from each other at the pattern crossing section. The partial conductor patterns of the first and second conductor patterns have their one ends beyond the crossing section each connected together to other ends of the second and first conductor patterns by arcuate conductors. The conductor patterns have their open ends connected to the signal outlets by conductor bars.

Description

Background of the invention [0001] The present invention relates to a coil for a magnetic resonance imaging apparatus forming at least two loops, and more particularly, the present invention relates to a magnetic coil capable of improving the coupling characteristics of a receiving coil by reducing the coupling capacitance at the intersection of the loops. Coils for resonance imaging devices. [0002] Magnetic resonance imaging apparatuses have been devised to carry out the imaging process by detecting the magnetic signals generated by nuclear magnetic resonance with receiving coils. attached Figure 7 Shown is an expanded view of a conventional saddle receiver coil. in the attached Figure 7 In , the coil 101 forms a pair of loop coils 201 and 202 on the right and left, and the loop coils 201 and 202 are connected in series. The loop coils 201 and 202 have conductor patterns (Patterns) 105 and 106 which form a loop conductor pattern 107 and a pattern intersection portion 11...

AI Technical Summary

Problems solved by technology

[0014] As mentioned above, the resistance component r increases with the increase of the coupling capacitance C, which will lead to a decrease in the Q value, as shown in equation (3)

As shown in equation (4), a smaller coil Q value leads to a lower S / N factor, which leads to a lower quality of the tomographic image

That is, an increase in the coupling capacitance C of the pattern intersection portion 111 lowers the Q value of the coil 101, causing a problem that the quality of the tomographic image is lowered.

Images