[특허]Optimizing treatment using TTFields by changing the frequency during the course of long term tumor treatment

Optimizing treatment using TTFields by changing the frequency during the course of long term tumor treatment 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-018/12 A61B-005/053 A61B-090/00 A61B-018/00 A61B-018/14
출원번호	US-0269784 (2014-05-05)
등록번호	US-9655669 (2017-05-23)
발명자 / 주소	Palti, Yoram Dishon, Matan
출원인 / 주소	Novocure Limited
대리인 / 주소	Potomac Law Group, PLLC
인용정보	피인용 횟수 : 0 인용 특허 : 35

초록 ▼

Tumors can be treated with an alternating electric field. The size of cells in the tumor is determined prior to the start of treatment by, for example, biopsy or by inverse electric impedance tomography. A treatment frequency is chosen based on the determined cell size. The cell size can be determined during the course of treatment and the treatment frequency is adjusted to reflect changes in the cell size. A suitable apparatus for this purpose includes a device for measuring the tumor impedance, an AC signal generator with a controllable output frequency, a processor for estimating the size of tumor cells and setting the frequency of the AC signal generator based thereon, and at least one pair of electrodes operatively connected to the AC signal generator such that an alternating electric field is applied to the tumor.

대표청구항 ▼

1. A method for adaptively treating a tumor with an alternating electric field, the method comprising the steps of: determining a first size of cells in the tumor;selecting a first frequency based on the determined first size;applying an alternating electric field to the tumor at the first frequency to treat the tumor;waiting a period of time and subsequently determining a second size of cells in the tumor;selecting a second frequency based on the determined second size; andapplying an alternating electric field to the tumor at the second frequency to treat the tumor,wherein the first frequency and the second frequency are selected based on an average cell size. 2. The method of claim 1, wherein the first size and the second size are determined based on a tumor biopsy. 3. The method of claim 1, wherein the first size and the second size are determined based on a measured impedance of the tumor. 4. The method of claim 3, wherein the determinations of the first size and the second size are made based on a Cole-Cole plot. 5. The method of claim 3, further comprising the steps of: imaging the tumor with CT, MRI, or PET to locate portions of the tumor not having blood or cyst fluid; anddetermining the first size and the second size based on a measure impedance of the located portions. 6. The method of claim 3, wherein the tumor is a glioma tumor or a melanoma tumor. 7. The method of claim 1, wherein the period of time is at least one week. 8. The method of claim 1, wherein the period of time is at least one month. 9. The method of claim 1, wherein the first frequency and the second frequency are selected based on a spectrum of cell sizes. 10. The method of claim 1 wherein the period of time is chosen based on the type of tumor. 11. The method of claim 1 wherein the period of time is chosen based on the history of the tumor. 12. The method of claim 1, wherein the first size and the second size are determined based on a database look-up table. 13. A method for adaptively providing a medical treatment to a patient, the method comprising the steps of: applying an alternating electric field to a group of patient cells;determining a first impedance of the group of patient cells based on a measured current while the alternating electric field is applied;estimating a first size of cells in the group of patient cells based on the first impedance;applying a second alternating electric field to the group of patient cells;determining a second impedance of the group of patient cells based on a measured current while the second alternating electric field is applied;estimating a second size of cells in the group of patient cells based on the second impedance;selecting a treatment parameter based on an average of the estimated size of cells; andapplying a treatment to the patient in accordance with the selected treatment parameter. 14. The method of claim 13, further comprising the steps of: waiting for a period of time between the applying the alternating electric field and the applying the second alternating electric field. 15. The method of claim 13, wherein the medical treatment is a surgery or therapy.

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Optimizing treatment using TTFields by changing the frequency during the course of long term tumor treatment 원문보기

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