摘要:
A radiation image signal output control method in which distance information that indicates a distance between a radiation image detection cassette and a receiving unit is obtained by a distance information obtaining means, and wireless signals are controlled by an output control means to be outputted from the radiation image detection cassette if the distance indicated by the distance information obtained by the distance information obtaining means is less than or equal to a predetermined value, and not to be outputted therefrom if the distance is greater than the predetermined value.
摘要:
A double-sided stimulable phosphor sheet, which emits light from both sides thereof when exciting light is applied to a recording surface thereof, is fed in an auxiliary scanning direction indicated by the arrow A by first and second roller pairs. First and second guide members are disposed on the side of the reverse surface of the stimulable phosphor sheet, for guiding the stimulable phosphor sheet, and a glass guide is disposed on the side of the reverse surface of the stimulable phosphor sheet in a position where a laser beam is applied to the stimulable phosphor sheet. The first and second guide members and the glass guide are integrally mounted on a guide mount. Radiation image information recorded on the stimulable phosphor sheet can efficiently be read highly accurately without damage being caused to the stimulable phosphor sheet.
摘要:
A breast image obtaining apparatus using a solid-sate detector, or stimulable phosphor panel capable of correctly obtaining image information up to the area closer to the chest wall of a subject. when picking up the image, the solid-state detector is moved to a place close to the side wall of the housing on the chest wall side by the moving means to pick up the image up to the area close to the chest wall, and when reading the image, it is moved to the opposite direction to secure the overrun zone between the side wall of the housing and end of the solid-state detector on the subject side. By completing acceleration or deceleration of the reading light exposure section within this zone, the scanning rate of the reading light exposure section is maintained constant across the entire region of the solid-state detector.
摘要:
In a two-side radiation image reading method wherein a stimulable phosphor sheet storing a radiation image is scanned by stimulating rays and light emitted from the front and back sides of the sheet is photoelectrically detected by photoelectric reading means separately located on the front and back sides of the sheet to obtain two image signals representing the radiation image to be subjected to addition processing or the like for obtaining a final image, shading correction data and/or fading correction data are obtained in advance and shading correction and/or fading correction is carried out on the image signals by using the correction data having been obtained. While an area equivalent to one side of the stimulable phosphor sheet (whose number of main scan lines is 4320) is being scanned, reading of the sheet is switched between the front and back sides and sensitivity of photoelectric reading means is also changed (to standard, semi-high, and high).
摘要:
In an image information read-out apparatus, a light beam scans an image recorded on a recording medium and an analog image signal representing the image is obtained. A logarithmic amplifier for logarithmic transformation of the analog image signal has certain characteristics in that a nonlinear portion of its range is in a dynamic range of the analog image signal. An A/D convertor digitizes the analog image signal transformed by the logarithmic amplifier and obtains a digital image signal. A correction circuit corrects the digital image signal so that the influence of shading is cancelled and linearly interpolates the part of the digital image signal corresponding to the nonlinear portion of the characteristics of the logarithmic amplifier on the basis of the characteristics of the shading and the characteristics of the nonlinear portion of the characteristics of the logarithmic amplifier, which have been obtained in advance.
摘要翻译:在图像信息读出装置中,光束扫描记录在记录介质上的图像,并获得表示图像的模拟图像信号。 用于模拟图像信号的对数变换的对数放大器具有某些特性,其范围的非线性部分处于模拟图像信号的动态范围内。 A / D转换器将由对数放大器变换的模拟图像信号数字化,并获得数字图像信号。 校正电路校正数字图像信号,使得阴影的影响被消除,并且基于阴影的特性和特征线性内插对应于对数放大器的特性的非线性部分的数字图像信号的一部分 预先获得的对数放大器的特性的非线性部分。