Stephen John Mohr

US Patent:

8067751, Nov 29, 2011

Filed:

Feb 11, 2009

Appl. No.:

12/369604

Inventors:

Stephen Mohr - Danville CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

A61N 5/00

US Classification:

2504921, 2504923, 2505051, 378 65, 378145, 378147, 378150, 378152

Abstract:

A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape.

US Patent:

8077830, Dec 13, 2011

Filed:

Sep 28, 2009

Appl. No.:

12/568619

Inventors:

Christopher E. Brown - Morgan Hill CA, US
Steven W. Prince - San Francisco CA, US
William A. Strachan - San Francisco CA, US
Stanley Mansfield - Sunnyvale CA, US
Stephen Mohr - Danville CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

G21K 3/00

US Classification:

378156, 378205, 378206

Abstract:

A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line.

US Patent:

8604450, Dec 10, 2013

Filed:

Nov 28, 2011

Appl. No.:

13/305682

Inventors:

Stephen Mohr - Danville CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

G21G 5/00

US Classification:

2504923, 2504921, 2505051

Abstract:

A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape.

US Patent:

20080073591, Mar 27, 2008

Filed:

Oct 30, 2006

Appl. No.:

11/589415

Inventors:

Stephen Mohr - Danville CA, US

International Classification:

A61N 5/06

US Classification:

2504941

Abstract:

A system and method are provided for a high resolution radiation treatment system which provide for projecting a field of radiation energy at targeted patient tissue. The system uses a multi-leaf collimator, which is positioned such that a significant clearance is provided between the multi-leaf collimator and the isocenter plane where the targeted tissue is located. The leaves of the multi-leaf collimator are designed to provide for high step resolution in the projected radiation energy shape. Additionally, an embodiment of the system and method herein can provide for a high step resolution in the projected radiation energy shape, and for a dose calculation matrix which has matrix units which coincide with the high step resolution in the projected radiation shape.

US Patent:

20110074288, Mar 31, 2011

Filed:

Sep 28, 2009

Appl. No.:

12/568621

Inventors:

Stephen Mohr - Danville CA, US
Christopher Patane - San Mateo CA, US
David H. Whittum - Sunnyvale CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

H01J 25/10
B23P 11/00
B23P 19/00

US Classification:

315 541, 29428, 29700

Abstract:

An energy switch assembly includes probe components that can undergo and survive elevated temperatures of a bake-out procedure, and drive components that have capabilities of continuous positioning a probe throughout the stroke of the probe. The drive components can be removable from the probe components and replaceable without breaking the vacuum of the accelerator guide assembly.

US Patent:

20120087478, Apr 12, 2012

Filed:

Dec 13, 2011

Appl. No.:

13/324767

Inventors:

Christopher E. Brown - Morgan Hill VA, US
Steven W. Prince - San Francisco CA, US
William A. Strachan - San Francisco CA, US
Stanley Mansfield - Sunnyvale CA, US
Stephen Mohr - Danville CA, US

Assignee:

Varian Medical Systems, Inc. - Palo Alto CA

International Classification:

G21K 3/00

US Classification:

378156

Abstract:

A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line.

US Patent:

20180161600, Jun 14, 2018

Filed:

Dec 14, 2017

Appl. No.:

15/842693

Inventors:

- Palo Alto CA, US
Roberto LUEVANO - Aptos CA, US
Stephen MOHR - Danville CA, US
Cody HELLSTERN - Sunnyvale CA, US
Borislav DJUROVIC - San Jose CA, US

International Classification:

A61N 5/10
G21K 1/10

Abstract:

A beam modifier shapes the distribution of a dose delivered to a target by a radiation beam emitted from a beam emitter of a radiotherapy device, particularly a beam that delivers a high radiation dose within a single, short period of time (e.g., less than a second). Elements of the beam modifier (e.g., rods) include material that can block or attenuate the beam. The elements can be dynamically and quickly configured to form an opening or transparent area through which a portion of the beam can pass unimpeded and to present different thicknesses of material to block or attenuate other portions of the beam, in this manner shaping the dose distribution at the target while protecting surrounding tissue.