title: [Characteristics of a new non-invasive x-ray output analyzer].
abstract: The X-ray systems study group used the Victoreen NERO mAx model 8000, a new non-invasive X-ray output analyzer, to measure the tube voltage, tube voltage waveform, tube current, and irradiation time for conditions corresponding to general radiography and mammography. The measurement results were then compared with those obtained using a conventional invasive measuring instrument. The peak values of the tube voltage measured by the NERO mAx and the invasive measuring instrument were compared. The NERO mAx had a good measurement error range of -1.2 to +0.9 kV. For tube current measurement by the NERO mAx, the maximum error for general radiography conditions was +11 mA and that for mammography conditions was +6 mA. For irradiation time measurement, the value for general radiography conditions was slightly greater and the value for mammography conditions was slightly less than the corresponding values obtained by the invasive measuring instrument. If radiation quality is changed during measurement of the characteristics, measurement values change. Since the NERO mAx incorporates two types of X-ray detectors, it shows good measurement reproducibility. The NERO mAx has been shown to have suitable characteristics for use as a measuring instrument for constancy tests. In the future, constancy tests should be used to quantitatively control the factors determining clinical image quality.
authors.affiliation: Department of Radiology, Nippon Medical School Second Hospital, Japan.
authors.forename: Fuminori
authors.initials: F
authors.lastname: Shinohara
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Ishikawa
authors.forename: Shigeru
authors.initials: S
authors.lastname: Miyazaki
authors.forename: Toshinori
authors.initials: T
authors.lastname: Ide
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Asano
authors.forename: Atsuko
authors.initials: A
authors.lastname: Tsukamoto
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Imai
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Okuaki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Tanigoshi
authors.forename: Shinji
authors.initials: S
authors.lastname: Abe
authors.forename: Izumi
authors.initials: I
authors.lastname: Ogura
authors.forename: Toru
authors.initials: T
authors.lastname: Negishi
mesh_terms: D008327:Mammography / Q000295:instrumentation; D011859:Radiography / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation*