Therapeutic apparatus for treating a subject using magnetic nanoparticles

Patent metadata

Field	Value
Publication number	US-9417302-B2
Application number	US-201013202435-A
Country	US
Kind code	B2
Filing date	Feb 22, 2010
Priority date	Feb 27, 2009
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A therapeutic apparatus for treating a subject comprising: a first heating means adapted for heating a first region of the subject, a first control means for controlling the power directed into the first region by the first heating means such that the power stays below a threshold value, a particle heating means adapted for heating magnetic nanoparticles within a second region of the subject using a time varying magnetic field, wherein the first region comprises the second region.

First claim

The invention claimed is:

1. A therapeutic apparatus for treating a subject comprising:
a first heating unit adapted for heating a first region of the subject,
a first control unit adapted for controlling the power directed into the first region by the first heating unit such that the power stays below a threshold value,
a particle heating unit adapted for heating magnetic nanoparticles within a second region of the subject using a time varying magnetic field,

wherein the first region includes the second region, wherein the first heating unit is an ultrasonic heating unit, wherein the threshold value is selected such that the temperature increase in the first region due to the ultrasonic heating unit does not induce cell death, wherein the second region includes at least one hyperthermia zone induced by the temperature increase in the first region due to the ultrasonic heating unit, wherein the at least one hyperthermia zone has a concentration of magnetic nanoparticles sufficient to cause a temperature increase after the ultrasonic heating which induces cell death when heated by the particle heating unit, and wherein the ultrasonic heating unit is a high intensity focused ultrasound unit,
wherein the particle heating unit modulates the magnetic field in the second zone such that it heats the magnetic nanoparticles using one of the following mechanisms: Brownian relaxation, Néel relaxation, or a combination of Brownian relaxation and Néel relaxation.

2. The therapeutic apparatus of claim 1 , wherein the particle heating unit further comprises a magnetic field generation unit adapted for heating the magnetic nanoparticles using focused magnetic particle therapy, wherein the therapeutic apparatus further comprises a second control unit for controlling the particle heating unit, wherein the second control unit is adapted for controlling the location of the second region, wherein the second control unit is adapted to receive planning data for planning treatment of the subject, and wherein the therapeutic apparatus is adapted for performing therapy using the planning data.

3. The therapeutic apparatus of claim 2 , wherein the magnetic field generation unit is further adapted for acquiring medical image data within an imaging zone using magnetic particle imaging, wherein the imaging zone includes the first region, and wherein the second control unit is adapted for generating planning data using the medical image data.

4. The therapeutic apparatus of claim 2 , wherein the therapeutic apparatus further comprises a magnetic resonance imaging system adapted for acquiring medical image data within an imaging zone, wherein the imaging zone comprises the first region, and wherein the second control unit is adapted for generating planning data using the medical image data.

5. The therapeutic apparatus of claim 4 , wherein the magnetic resonance imaging system is adapted for acquiring temperature data using magnetic resonance thermometry, wherein the medical image data comprises temperature data, wherein the first control unit is adapted for limiting the temperature in the first region using the medical image data, and wherein the second control unit is adapted for controlling the temperature in the second region using the medical image data.

6. The therapeutic apparatus of claim 3 , wherein the therapeutic apparatus is adapted for acquiring medical image data at periodic intervals, wherein the therapeutic apparatus is adapted for identifying the location of a target region within the subject using the medical image data, wherein the second control unit is adapted for generating real time planning data using the location of the target region, wherein the second control unit is adapted for adjusting the location of the second region based upon motion and/or deformation of the target region using the real time planning data.

7. The therapeutic apparatus of claim 1 , wherein the therapeutic apparatus is operable for treating any one of the following: tumors in an eye, tumors in the brain, tumors in nerve bundles, tumors in the spinal cord, tumors in a lung, tumors in the prostate gland, tumors adjacent to an eye, tumors adjacent to the brain, tumors adjacent to nerve bundles, tumors adjacent to a lung, tumors adjacent to the prostate gland, tumors adjacent to the wall of the bladder, tumors adjacent to the rectum, tumors adjacent to an organ boundary, multiple tumors distributed throughout the subject, tumors with multiple small foci, tumors adjacent to air tissue boundaries, or tumors adjacent to bone tissue boundaries.

8. A computer program product comprising a set of executable instructions for execution by a therapeutic apparatus for treating a subject, comprising the steps of:
controlling a first heating unit adapted for heating a first region of the subject such that the power directed into the first region by the first heating unit stays below a threshold value,
controlling a particle heating unit adapted for heating magnetic nanoparticles within a second region using a time varying magnetic field after the heating of a first region, and wherein the first region includes the second region,
wherein the first heating unit is an ultrasonic heating unit, wherein the threshold value is selected such that the temperature increase in the first region due to the ultrasonic heating unit does not induce cell death, wherein the second region includes at least one hyperthermia zone induced by the temperature increase in the first region due to the ultrasonic heating unit, wherein the at least one hyperthermia zone has a concentration of magnetic nanoparticles sufficient to cause a temperature increase which induces cell death when heated by the particle heating unit, wherein the ultrasonic heating unit is a high intensity focused ultrasound unit and wherein the particle heating unit modulates the magnetic field in the second zone such that it heats the magnetic nanoparticles using one of the following mechanisms: Brownian relaxation, Néel relaxation, or a combination of Brownian relaxation and Néel relaxation.

9. The computer program product of claim 8 , wherein the particle heating unit comprises a magnetic field generation unit adapted for focused magnetic particle therapy, the computer program product further comprising the steps of:
receiving planning data for planning treatment of the subject,
controlling the treatment of the subject using the planning data, and
controlling the location of the second region using the magnetic field generation unit.

10. The computer program product of claim 9 further comprising the steps of:
acquiring medical image data within an imaging zone using magnetic particle imaging and/or magnetic resonance imaging, wherein the imaging zone includes the first region, and
generating planning data using the medical image data.

11. The computer program product of claim 10 further comprising the steps of:
acquiring medical image data at periodic intervals,
identifying the location of a target region within subject using the medical image data acquired at periodic intervals,
generating real time planning data using the location of the target region, and
adjusting the location of the second region based upon motion and/or deformation of the target region using the real time planning data.

Assignees

• Kuhn Michael Harald
• Koninklijke Philips Nv

Inventors

• Kuhn Michael Harald

Classifications

• A61B18/18

  by applying electromagnetic radiation, e.g. microwaves · CPC title

• A61B2017/00084

  Temperature · CPC title

• G01R33/4808

  Multimodal MR, e.g. MR combined with positron emission tomography [PET], MR combined with ultrasound or MR combined with computed tomography [CT] · CPC title

• A61B5/01

  Measuring temperature of body parts {; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue} (clinical contact thermometers G01K13/20) · CPC title

• A61N5/02

  using microwaves · CPC title