Ricardo Julio Ahumada

US Patent:

7564950, Jul 21, 2009

Filed:

Feb 17, 2006

Appl. No.:

11/357610

Inventors:

Dieter Manthey - Clayton CA, US
Dave Pond - Novato CA, US
Johannes Stahl - Walnut Creek CA, US
Ricardo Ahumada - Martinez CA, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G21K 1/04
G01N 23/04

US Classification:

378150, 378 62, 378151

Abstract:

A system and method for capturing a portal image using a linear accelerator having a multi-leaf collimator (MLC) and an imager allows the portal image field to be automatically clipped using the multi-leaf collimator so that the projection of the portal image field onto the imager falls within the allowed image area of the imager. In this manner, portal images may be obtained in instances where the projection of the portal image field onto the flat-panel imager is larger than an allowed image area of the imager, or where the projection of the portal image field onto the imager is not centered and would extend beyond the allowed image area, so that radiation sensitive electronics outside of the allowed image area are protected from undesirable exposure to radiation.

US Patent:

57182302, Feb 17, 1998

Filed:

Sep 26, 1996

Appl. No.:

8/721300

Inventors:

Christopher S. Chapman - Redmond WA
Ricardo Ahumada - Issaquah WA
John C. Lazenby - Fall City WA

Assignee:

Siemens Medical Systems, Inc. - Iselin NJ

International Classification:

A61B 800

US Classification:

12866101

Abstract:

An ultrasound system creates ultrasound images at faster frame rate by eliminating ultrasonic transmissions along every beam line. Preferably, ultrasound images are created by alternately transmitting ultrasonic signals on the even and odd transmit beam lines. Parallel beam forming is used where transmissions along a single transmit beam line create echo signals on a pair of receive beam lines. To eliminate the artifact caused by the round-trip beam line sensitivities, echo signals created in response to transmissions along the even transmit beam lines are averaged with echo signals created in response to transmissions on the odd transmit beam lines. The averaged echo signals are used to create an ultrasound image without artifacts.