The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2014
Filed:
Aug. 05, 2013
Hitachi, Ltd., Tokyo, JP;
Shusuke Hirayama, Hitachinaka, JP;
Rintaro Fujimoto, Hitachinaka, JP;
Yoshihiko Nagamine, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Optimal irradiation conditions determined by iterative calculation are based upon an operator-defined irradiating direction, prescription dose, and other conditions. Dose matrixes A and B relating doses to calculation points from a beam delivered to irradiating positions are divided into a dose matrix Aor Bfor the calculation points in a target region that are present at distances equal to or less than a distance L from the beam axis of the beam delivered to each spot, and a dose matrix Aor Bfor the calculation points that are present at distances greater than L. When the iterative calculation is conducted following completion of the division, dose values and {right arrow over (d)}and {right arrow over (d)}that include the dose matrixes Aand Bare regarded as constants, and if updating conditions are satisfied, an objective function is recalculated using the values of the dose matrixes A, B and the spot irradiation dose {right arrow over (x)}.