Rotational output and beam quality evaluations for helical tomotherapy with use of a third-party quality assurance tool.

Our aim was to determine whether a third-party quality assurance (QA) tool was suitable for the measurement of rotational output and beam quality in place of on-board detector signals. A Rotational Therapy Phantom 507 (507 Phantom) was used as a QA tool. The rotational output constancy (ROC507) and the beam quality index ([Formula: see text]) were evaluated by analysis of signals from an ion chamber inserted into the 507 Phantom.

Influence of ligand flexibility on the electronic structure of oxidized Ni(III)-phenoxide complexes.

One-electron-oxidized Ni(III)-phenoxide complexes with salen-type ligands, [Ni(salen)py2](2+) ([1(en)-py](2+)) and [Ni(1,2-salcn)py2](2+) ([1(cn)-py](2+)), with a five-membered chelate dinitrogen backbone and [Ni(salpn)py2](2+) ([2(pn)-py](2+)), with a six-membered chelate backbone, have been characterized with a combination of experimental and theoretical methods. The five-membered chelate complexes [1(en)-py](2+) and [1(cn)-py](2+) were assigned as Ni(III)-phenoxyl radical species, while the six-membered chelate complex [2(pn)-py](2+) was concluded to be a Ni(II)-bis(phenoxyl radical) species with metal-centered reduction in the course of the one-electron oxidation of the Ni(III)-phenoxide complex [2(pn)-py](+). Thus, the oxidation state of the one-electron-oxidized Ni(III) salen-type complexes depends on the chelate ring size of the dinitrogen backbone.

[Three successful case reports of advanced gastric cancer with chemotherapy].

We report three successful cases with continuous systemic chemotherapy for advanced gastric cancer. Case 1: A 67-year-old male with gastric cancer. Abdominal CT showed the invasion in the pancreas and as a result, continuous systemic infusion of low-dose cisplatin (CDDP 20 mg/day) and 5-fluorouracil (5-FU 1,000 mg/day) was performed.