title: [Characteristics of specifications of transportable inverter-type X-ray equipment].
abstract: Our X-ray systems study group measured and examined the characteristics of four transportable inverter-type X-ray equipments. X-ray tube voltage and X-ray tube current were measured with the X-ray tube voltage and the X-ray tube current measurement terminals provided with the equipment. X-ray tube voltage, irradiation time, and dose were measured with a non-invasive X-ray tube voltage-measuring device, and X-ray output was measured by fluorescence meter. The items investigated were the reproducibility and linearity of X-ray output, error of pre-set X-ray tube voltage and X-ray tube current, and X-ray tube voltage ripple percentage. The waveforms of X-ray tube voltage, the X-ray tube current, and fluorescence intensity draw were analyzed using the oscilloscope gram and a personal computer. All of the equipment had a preset error of X-ray tube voltage and X-ray tube current that met JIS standards. The X-ray tube voltage ripple percentage of each equipment conformed to the tendency to decrease when X-ray tube voltage increased. Although the X-ray output reproducibility of system A exceeded the JIS standard, the other systems were within the JIS standard. Equipment A required 40 ms for X-ray tube current to reach the target value, and there was some X-ray output loss because of a trough in X-ray tube current. Owing to the influence of the ripple in X-ray tube current, the strength of the fluorescence waveform rippled in equipments B and C. Waveform analysis could not be done by aliasing of the recording device in equipment D. The maximum X-ray tube current of transportable inverter-type X-ray equipment is as low as 10-20 mA, and the irradiation time of chest X-ray photography exceeds 0.1 sec. However, improvement of the radiophotographic technique is required for patients who cannot move their bodies or halt respiration. It is necessary to make the irradiation time of the equipments shorter for remote medical treatment.
authors.affiliation: Department of Radiology, Ida Municipal Hospital, Kawasaki City.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Shigeru
authors.initials: S
authors.lastname: Miyazaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Asano
authors.forename: Fuminori
authors.initials: F
authors.lastname: Shinohara
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Ishikawa
authors.forename: Toshinori
authors.initials: T
authors.lastname: Ide
authors.forename: Shinji
authors.initials: S
authors.lastname: Abe
authors.forename: Toru
authors.initials: T
authors.lastname: Negishi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miyake
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Imai
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Okuaki
mesh_terms: D006699:Home Care Services; D006801:Humans; D011859:Radiography / Q000295:instrumentation*; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results