Adam C Molzahn

US Patent:

20090140671, Jun 4, 2009

Filed:

Nov 30, 2007

Appl. No.:

11/948359

Inventors:

Adam C. Molzahn - Leominster MA, US
John J. Vincent - Williamstown MI, US

International Classification:

H05H 13/00
H03L 7/00

US Classification:

315502, 313 62, 331 9

Abstract:

A synchrocyclotron includes magnetic structures that define a resonant cavity, a source to provide particles to the resonant cavity, a voltage source to provide radio frequency (RF) voltage to the resonant cavity, a phase detector to detect a difference in phase between the RF voltage and a resonant frequency of the resonant cavity that changes over time, and a control circuit, responsive to the difference in phase, to control the voltage source so that a frequency of the RF voltage substantially matches the resonant frequency of the resonant cavity.

US Patent:

20200078603, Mar 12, 2020

Filed:

Sep 17, 2019

Appl. No.:

16/573130

Inventors:

- Littleton MA, US
Adam C. Molzahn - Leominster MA, US

International Classification:

A61N 5/10
H05H 13/04
H05H 7/04
H05H 13/02

Abstract:

An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.

US Patent:

20170281968, Oct 5, 2017

Filed:

Apr 20, 2017

Appl. No.:

15/492132

Inventors:

- Littleton MA, US
Adam C. Molzahn - Leominster MA, US

International Classification:

A61N 5/10
H05H 7/04
H05H 13/04

Abstract:

An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.

US Patent:

20170014649, Jan 19, 2017

Filed:

Sep 14, 2016

Appl. No.:

15/265326

Inventors:

- Littleton MA, US
Stanley J. Rosenthal - Wayland MA, US
Thomas C. Sobczynski - Arlington MA, US
Adam C. Molzahn - Leominster MA, US
Charles D. O'Neal - Bolton MA, US
James Cooley - Andover MA, US

International Classification:

A61N 5/10
A61N 1/44

Abstract:

An example particle therapy system includes the following: a gantry that is rotatable relative to a patient position; a particle accelerator mounted to the gantry, where the particle accelerator is for outputting a particle beam essentially directly to the patient position; and a control system to receive a prescription and to generate machine instructions for configuring one or more operational characteristics of the particle therapy system. At least one of the operational characteristics relates to a rotational angle of the gantry relative to the patient position.

US Patent:

20150231411, Aug 20, 2015

Filed:

Feb 20, 2014

Appl. No.:

14/184990

Inventors:

- Littleton MA, US
Adam C. Molzahn - Leominster MA, US

Assignee:

Mevion Medical Systems, Inc. - Littleton MA

International Classification:

A61N 5/10

Abstract:

An example particle therapy system includes: a particle accelerator to output a beam of charged particles; and a scanning system to scan the beam across at least part of an irradiation target. An example scanning system includes: a scanning magnet to move the beam during scanning; and a control system (i) to control the scanning magnet to produce uninterrupted movement of the beam over at least part of a depth-wise layer of the irradiation target so as to deliver doses of charged particles to the irradiation target; and (ii) to determine, in synchronism with delivery of a dose, information identifying the dose actually delivered at different positions along the depth-wise layer.

US Patent:

20140091734, Apr 3, 2014

Filed:

Sep 27, 2013

Appl. No.:

14/038967

Inventors:

- Littleton MA, US
Stanley Rosenthal - Wayland MA, US
Thomas C. Sobczynski - Arlington MA, US
Adam C. Molzahn - Leominster MA, US

Assignee:

Mevion Medical Systems, Inc. - Littleton MA

International Classification:

H05H 13/02
A61N 5/10

US Classification:

315502

Abstract:

An example particle therapy system includes a particle accelerator to output a particle beam, where the particle accelerator includes: a particle source to provide pulses of ionized plasma to a cavity, where each pulse of the particle source has a pulse width corresponding to a duration of operation of the particle source to produce the corresponding pulse, and where the particle beam is based on the pulses of ionized plasma; and a modulator wheel having different thicknesses, where each thickness extends across a different circumferential length of the modulator wheel, and where the modulator wheel is arranged to receive a precursor to the particle beam and is configured to create a spread-out Bragg peak for the particle beam

US Patent:

20140094638, Apr 3, 2014

Filed:

Sep 27, 2013

Appl. No.:

14/039307

Inventors:

- Littleton MA, US
Gerrit Townsend Zwart - Durham NH, US
Jan Van der Laan - Danvers MA, US
Adam C. Molzahn - Leominster MA, US
Thomas C. Sobczynski - Arlington MA, US
James Cooley - Andover MA, US

Assignee:

Mevion Medical Systems, Inc. - Littleton MA

International Classification:

H05H 7/02
A61N 5/10
H05H 13/02

US Classification:

600 1, 315502

Abstract:

In an example, a synchrocyclotron includes a particle source to provide pulses of ionized plasma to a cavity; a voltage source to provide a radio frequency (RF) voltage to the cavity to accelerate particles from the plasma column outwardly; and an extraction channel to receive a beam of particles from the cavity for output from the particle accelerator. The particle source is configured to control pulse widths of the ionized plasma in order to control an intensity of the beam of particles. This example synchrocyclotron may include one or more of the following features, either alone or in combination.

US Patent:

20140094643, Apr 3, 2014

Filed:

Sep 27, 2013

Appl. No.:

14/038888

Inventors:

- Littleton MA, US
Stanley Rosenthal - Wayland MA, US
Thomas C. Sobczynski - Arlington MA, US
Adam C. Molzahn - Leominster MA, US
James Cooley - Andover MA, US

Assignee:

Mevion Medical Systems, Inc. - Littleton MA

International Classification:

A61N 5/10

US Classification:

600 2, 600 1

Abstract:

An example particle therapy system includes the following: a gantry that is rotatable relative to a patient position; a particle accelerator mounted to the gantry, where the particle accelerator is for outputting a particle beam essentially directly to the patient position; and a control system to receive a prescription and to generate machine instructions for configuring one or more operational characteristics of the particle therapy system. At least one of the operational characteristics relates to a rotational angle of the gantry relative to the patient position.