Micro robot and micro robot behavior measurement system

{
  "publication_number": "US11204423B2",
  "country": "US",
  "kind": "B2",
  "title": "Micro robot and micro robot behavior measurement system",
  "abstract": "A micro robot that is moveable in a body includes first quantum dots.",
  "claims": [
    "1. A micro robot that is moveable in a body, the micro robot comprising: a body portion; first quantum dots arranged on a first area of the body portion; and second quantum dots arranged on a second area different from the first area of the body portion, the second quantum dots absorbing light emitted from the first quantum dots, wherein the first area and the second area are symmetrically arranged based on a first axis that is in parallel with a moving direction of the micro robot.",
    "2. The micro robot of claim 1, wherein the body portion comprising a magnetic portion, the body portion being moved by an external electromagnetic field.",
    "3. The micro robot of claim 1, wherein the body portion is coated with the first quantum dots.",
    "4. The micro robot of claim 2, wherein the first quantum dots absorb irradiated light of a near infrared ray wavelength band or a shortwave infrared ray (SWIR) band, and emit light of the SWIR band.",
    "5. The micro robot of claim 1, further comprising: an indicator located at an end or an intermediate portion of the body portion, the indicator having the first quantum dots arranged thereon.",
    "6. The micro robot of claim 1, wherein the first quantum dots are arranged inside the body portion.",
    "7. The micro robot of claim 6, wherein the body portion is embedded with the first quantum dots.",
    "8. A system for measuring a behavior of a micro robot, the system comprising: a light source for irradiating light; the micro robot comprising first quantum dots that absorb the light irradiated from the light source and emit light; and a detection unit configured to sense the light emitted from the first quantum dots, wherein the micro robot further comprising: a body portion including a first area, the first quantum dots arranged on the first area; and second quantum dots arranged on a second area different from the first area of the body portion, the second quantum dots absorbing light emitted from the first quantum dots, wherein the first area and the second area are symmetrically arranged based on a first axis that is in parallel with a moving direction of the micro robot.",
    "9. The system of claim 8, wherein: the light source irradiates light of a near infrared ray wavelength band or a shortwave infrared ray (SWIR) wavelength band; and the first quantum dots absorb the irradiated light of the near infrared ray wavelength band or the SWIR wavelength band and emit light of the SWIR wavelength band.",
    "10. The system of claim 8, wherein the body portion comprising a magnetic portion.",
    "11. The system of claim 8, wherein the detection unit detects rotation of the micro robot by using a difference in intensity of the detected light."
  ],
  "description_excerpt": "1. Field The present disclosure relates to a micro robot, and more particularly, to a micro robot, a behavior of which may be measured by using quantum dots, and a system for measuring behavior of a micro robot. 2. Description of Related Art A micro robot is a structure that delivers drugs, cells, etc. to a desired location in a body part such as a micro-vessel, cerebrospinal fluid, an eyeball, etc. Such a micro robot is driven by various methods that use a chemical reaction with surrounding fluid, acoustic energy or magnetic energy from outside, or biological propulsion such as mobility of bacteria. As a micro robot technology using one of the above driving methods, a technology of forming a polymer structure by using a three-dimensional (3D) lithography technique, coating the polymer structure with a magnetic body and a biocompatible material, and shipping, growing, and delivering drugs or cells in the body by being controlled by an external magnetic field has been suggested. In addition, methods of measuring behavior of a micro robot by using X-ray or fluorescent substance after the micro robot is inserted into the body have been suggested. However, when the X-ray is used, there is a concern about that a patient is exposed to a high-energy radiation and there may be a hardware interference with a system for driving the micro robot. When the fluorescent substance is used, it may be difficult to measure the behavior by using a small amount of fluorescent substance and it is difficult to perform real-time measurement due to a large size of the measurement system.",
  "cpc": [
    "G01S 17/66",
    "A61B 2017/00345",
    "A61B 2017/00411",
    "A61B 2017/00876",
    "A61B 2034/2055",
    "A61B 2034/303",
    "A61B 2034/731",
    "A61B 2090/376",
    "A61B 34/30",
    "A61B 34/72",
    "A61K 41/00",
    "A61K 49/0067",
    "A61K 49/0091",
    "A61M 31/00",
    "B25J 19/02",
    "B25J 7/00",
    "B25J 9/1005",
    "G01S 17/06"
  ],
  "ipc": [
    "G01S 17/06",
    "G01S 17/66"
  ],
  "assignees": [
    "DAEGU GYEONGBUK INST SCIENCE & TECH"
  ],
  "inventors": [
    "LEE HYUN KI",
    "KIM JIN YOUNG",
    "LIM SUNG JUN",
    "CHOI HONG SOO"
  ],
  "filing_date": "2019-08-30",
  "publication_date": "2021-12-21",
  "grant_date": "2021-12-21",
  "priority_date": "2018-09-04",
  "application_number": "US-201916557165-A",
  "family_id": "69639853",
  "citations": [
    "JP2001179700A",
    "KR20130045001A",
    "US2011270434A1",
    "US2012153226A1",
    "US2012228386A1",
    "US2015297086A1",
    "US2017084776A1",
    "US2017143830A1",
    "US2019015930A1"
  ]
}