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    • 42. 发明授权
    • Radiation image storage panel
    • 辐射图像存储面板
    • US07081632B2
    • 2006-07-25
    • US10653248
    • 2003-09-03
    • Yuichi HosoiSatoshi Arakawa
    • Yuichi HosoiSatoshi Arakawa
    • G03B42/08
    • G03B42/08
    • A radiation image storage panel comprises a stimulable phosphor layer capable of emitting light when being exposed to stimulating rays, which cause the stimulable phosphor layer to emit the light in proportion to an amount of energy stored on the stimulable phosphor layer during exposure of the stimulable phosphor layer to radiation. The stimulable phosphor layer is adapted for radiating out the emitted light with an intensity distribution that is compressed in a direction, which is normal to a surface of the stimulable phosphor layer, and into an oblate distribution, which is flatter than a cos θ distribution.
    • 辐射图像存储面板包括能够在暴露于刺激光线时发光的可激发荧光体层,其使得可刺激的荧光体层在可刺激的荧光体的曝光期间与存储在可刺激的荧光体层上的能量的量成比例地发射光 层到辐射。 可刺激的荧光体层适于以与可激发的荧光体层的表面正交的方向压缩的强度分布和比cosθ分布平坦的扁平分布来辐射发射的光。
    • 47. 发明授权
    • Method and apparatus for evaluating digital radiation image
    • 用于评估数字辐射图像的方法和装置
    • US06801647B1
    • 2004-10-05
    • US09553179
    • 2000-04-20
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G06K900
    • G06T5/50G06T2207/10116G06T2207/30004
    • The digital radiation image evaluating method and apparatus record previously at least two radiation images with different exposed doses of the radiation, determine a value of evaluation of at least one of granularity and image quality of a digital radiation image for each of at least two digital radiation images obtained from at least two radiation images to obtain at least two values of evaluation, construct from at least two values of evaluation a correction curve for the value of evaluation to the exposed dose of the radiation and calculate by means of the correction curve the value of evaluation of the digital radiation image of a given dose exposed to the radiation. By the method and apparatus, the correct value of evaluation of the granularity and image quality of digital radiation image can be obtained for precisely predetermined doses exposed to radiation.
    • 数字辐射图像评估方法和装置先前记录具有不同曝光剂量的辐射的至少两个辐射图像,确定对于至少两个数字辐射中的每一个的数字辐射图像的粒度和图像质量中的至少一个的评估值 从至少两个辐射图像获得的图像以获得至少两个评估值,从评估值至少两个值建立评估值到曝光的辐射剂量,并通过校正曲线计算值 对暴露于辐射的给定剂量的数字辐射图像进行评估。 通过该方法和装置,可以获得对辐射的精确预定剂量的数字辐射图像的粒度和图像质量的评估的正确值。
    • 48. 发明授权
    • Radiation image read-out method and apparatus
    • 辐射图像读出方法和装置
    • US06703637B2
    • 2004-03-09
    • US09969721
    • 2001-10-04
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G01J158
    • G03B42/02
    • Stimulating rays are linearly irradiated onto an area of a stimulable phosphor sheet, on which a radiation image has been stored by use of a stationary grid. Light emitted by the sheet is detected with a line sensor constituted such that a reciprocal of an array pitch of photoelectric conversion devices is larger than a value two times as large as a spatial frequency of stripe-like grid patterns recorded due to the stationary grid, which spatial frequency is taken with respect to an array direction of the photoelectric conversion devices. Filtering processing for removing the grid patterns is performed on an image signal having been outputted from the line sensor.
    • 刺激光线被线性地照射到可刺激的荧光粉片的区域上,其上已经通过使用固定网格存储了放射线图像。 利用线传感器检测由片状物发出的光,使得光电转换元件的阵列间距的倒数大于由于固定格栅而记录的条纹格栅图案的空间频率的两倍, 相对于光电转换装置的阵列方向拍摄空间频率。 对从线传感器输出的图像信号进行用于去除格栅图案的滤波处理。
    • 50. 发明授权
    • Method and apparatus for recording and reading out radiation images
    • 用于记录和读出辐射图像的方法和装置
    • US06528811B1
    • 2003-03-04
    • US09645439
    • 2000-08-25
    • Satoshi Arakawa
    • Satoshi Arakawa
    • G03B4202
    • G03B42/02
    • A waiting time between when a radiation image of an object was stored on a stimulable phosphor sheet and when readout of the radiation image from the stimulable phosphor sheet is begun is set in accordance with an intensity of radiation after-glow, which continues to occur with the stimulable phosphor sheet after the radiation image was stored on the stimulable phosphor sheet. The step of reading out the radiation image and a step of moving the stimulable phosphor sheet with respect to an image read-out section is controlled such that the readout of the radiation image from the stimulable phosphor sheet is begun after the waiting time, which has been set, has elapsed. Adverse effects of the radiation after-glow are thus reduced with a simple constitution.
    • 将物体的放射线图像存储在可刺激的荧光体片材上并且当从可激发的荧光体片材读出辐射图像时开始等待时间是根据随着辐射继续发生的辐射余辉的强度而设定的 将辐射图像上的可刺激的荧光体片材储存在可刺激的荧光体片材上。 控制读取放射线图像的步骤和相对于图像读出部分移动可刺激的磷光体片的步骤,使得在等待时间之后开始来自可刺激的磷光体片材的放射线图像的读出, 已经设定,已经过去了。 因此,以简单的结构减少辐射余辉的不利影响。