Position detection marker

Patent metadata

Field	Value
Publication number	US-12070364-B2
Application number	US-202217964826-A
Country	US
Kind code	B2
Filing date	Oct 12, 2022
Priority date	Oct 18, 2021
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

Disclosed herein is a position detection marker that includes a magnetic field source that generates magnetism, an MRI marker that can be detected by a magnetic resonance imaging method, and a holding part that fixes a relative positional relation between the magnetic field source and the MRI marker.

First claim

What is claimed is:

1. A position detection marker comprising:
a bobbin having a cylindrical winding core;
a coil wound around the cylindrical winding core of the bobbin, the coil having an inner diameter and a first end and a second end, and
a connector connected to the first and second ends of the coil and configured to enable an external cable to be selectively attached to the connector and detached from the connector, and
an MRI marker configured to be detected by magnetic resonance imaging,
wherein the MRI marker is configured to be inserted into the cylindrical winding core of the bobbin such that the MRI marker is disposed in the inner diameter area of the coil.

2. The position detection marker as claimed in claim 1 , wherein the MRI marker is selectably attachable to the bobbin and detachable from the bobbin.

3. The position detection marker as claimed in claim 1 , further comprising:
a housing configured to house the coil and the MRI marker; and
a lid configured to close the housing.

4. The position detection marker as claimed in claim 3 ,
wherein the lid has an opening exposing the MRI marker.

5. The position detection marker as claimed in claim 4 , wherein the MRI marker protrudes from the opening of the lid.

6. The position detection marker as claimed in claim 3 , further comprising a screw that fixes the housing and the lid part.

7. The position detection marker as claimed in claim 3 , wherein the housing comprises a claw that is hooked on an annular part provided in the lid.

8. The position detection marker as claimed in claim 3 , wherein the housing and the lid are fixed to each other by a male screw provided in the housing that is configured to engage a female screw provided in the lid.

Assignees

• Tdk Corp

Inventors

• Shibuya Tomohiko
• Hotta yu
• FUKUI Takato

Classifications

• G01R33/58

  Calibration of imaging systems, e.g. using test probes {, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material} · CPC title

• A61B2090/3958

  emitting a signal · CPC title

• G01R33/0094

  Sensor arrays · CPC title

• G01R33/10

  Plotting field distribution {; Measuring field distribution} · CPC title

• A61B90/39 Primary

  Markers, e.g. radio-opaque or breast lesions markers · CPC title