Details

Autor(en) / Beteiligte

• Nishizawa, Kunihide
• Maekoshi, Hisashi
• Kamiya, Yoshihiro
• Kobayashi, Yoshio
• Ohara, Ken
• Sakuma, Sadayuki

Titel

Alignment of x‐ray tube focal spots for spectral measurement

Ist Teil von

• Medical physics (Lancaster), 1982-03, Vol.9 (2), p.284-287

Ort / Verlag

United States: American Association of Physicists in Medicine

Erscheinungsjahr

1982

Quelle

MEDLINE

Beschreibungen/Notizen

• A general method to align a diagnostic x‐ray machine for x‐ray spectrum measurement purpose was theoretically and experimentally investigated by means of the optical alignment of focal pinhole images. Focal pinhole images were obtained by using a multi‐pinholed lead plate. The vertical plane, including the central axis and tube axis, was decided upon by observing the symmetry of focal images. The central axis was designated as a line through the center of focus parallel to the target surface lying in the vertical plane. A method to determine the manipulation of the central axis in any direction is presented.