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Inventor:
Johnsen; Stanley W.
Address:
Palo Alto, CA
No. of patents:
7
Patents:












Patent Number Title Of Patent Date Issued
8116430 Multi-mode cone beam CT radiotherapy simulator and treatment machine with a flat panel imager February 14, 2012
A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager ca
7945021 Multi-mode cone beam CT radiotherapy simulator and treatment machine with a flat panel imager May 17, 2011
A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager ca
7642534 Multileaf collimator for electron radiotherapy January 5, 2010
A flexible multi-leaf collimator for electron radiotherapy is provided, where the leaves are not a single rigid component, but are configured in a manner that curves away from the patient to provide greater clearance. The invention includes a plurality of flexible assemblies, at least on
7295649 Radiation therapy system and method of using the same November 13, 2007
A method of using a radiation system having a multileaf collimator ("MLC") to adjust for unevenness in the radiation emitted by the system is disclosed. By appropriately controlling the MLC in accordance with the invention the system can be operated without a flattening filter. In ad
6907106 Method and apparatus for producing radioactive materials for medical treatment using x-rays prod June 14, 2005
An apparatus and method for irradiating target objects, especially medical stents for in vivo implantation. A linear accelerator provides a high energy electron beam that impinges upon and is received by an x-ray conversion target. The x-ray conversion target is activated by either a
5072123 Method of measuring total ionization current in a segmented ionization chamber December 10, 1991
Information on radiation dosage from segmented ionization chambers can be incomplete due to the existence of insensitive regions of the chamber. By measuring the total current to the high voltage power supply, the total ionization current including that in the insensitive areas can be
4877961 In-line electron beam energy monitor and control October 31, 1989
A beam of charged particles is scattered by a thin foil and the flux at two angles .theta..sub.1 and .theta..sub.2, is sampled to yield an exponential function of the respective energy difference, E(.theta..sub.2)-E(.theta..sub.1). For .theta..sub.1 =0.degree., a signal representativ










 
 
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