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The ability of a material to block or partially block the passage of X-rays
And gamma rays is called:材料能阻挡或部分阻挡X射线或伽玛射线的能力被称为:

For a given change in the radiation exposure, film contrast is the inherent

Ability to show:改变射线光,胶片对比度的固有能力将会显示出:

When a faster speed film is substituted for a slower one to improve the
Economics of the exposure, which of the following conditions occurs?为
了获得经济性地光,用快速胶片替代低速胶片,会发生以下哪种情况?

Co-59 becomes Co-60 when it is placed in a nuclear reactor where it

Captures:当钴59放在核反应堆中捕获.…….会变成钴60?

A light image of a backing B on a processed radiograph is probably
Caused by被处理后的射线底片上产生一个亮的B影像,很可能是因为

A larger physical size source may produce an equivalent quality
Radiograph if:在什么情况下,一个物理尺寸大的源会产生等效的射线底片

6 On a radiograph of a pipe welD there is a very light irregularly shaped
Small image in the weld. This image would most likely be due to the
Presence of: 一个管焊缝进行射线透照,在焊缝处有一个轻微的不规则的
形状呈现出很小的影像。此影像很可能是由于存在:

With respect to quality, what three factors must be considered in
Selecting a source-to-film distance? 就质量而言,考虑到选择源-胶片的距
离的三个因素是?

8 When X-rays, gamma rays, light, or electrons strike the photographic

Emulsion, a change takes place in the silver halide crystals. This change

Is called:当时行X射线,伽玛射线,光子或电子撞击照片的乳化层,乳化银晶粒会产生变化,此变化称为:

The main purpose of the X-ray generator controls on the equipment is to:
X射线发生器控制设备的主要目的是

Two serious obstacles to high-intensity fluoroscopy are:对于高强度荧光
射线/透视射线的两个严重的阻碍是?

A gas-filled region located in an electrical field created by electrodes

Across which a potential difference is applied forms the major portion of:

由电极产生的电场中的气体填充区域有着不同的电位差,被主要应用在以

下哪种形式中?

Two isotropic sources of a given strength have two different specific
Activity values. The source with the higher specific activity value will:两个
给定强度的同位素源有着不同的比活度值。高比活度的源将:

A device that is basically a combination of magnet and transformer

Designed to guide and accelerate electrons in a circular orbit to very high

Energies is called:一个装置基本上由磁铁和变压器组成,用来在环形轨道

上引导和加速电子达到很高的能量,它被称为

The purpose for including a disk-shaped target that rotates rapidly during
应
Operation in some X-ray tubes is to: 在一些X射线管中,操作过程中,应
用快速旋转的盘形靶的目的是:

The most commonly used target material in an X-ray tube is: X射线管中

最常见的靶的材料是:

The half-life of radioactive Cs-137 is nearest to: 放射性的铯137的半期
接近于?

As the effective energy of the radiation increases: 随着射线有效能量的增
加

X-ray films with large grain size:大颗粒度尺寸X射线胶片?

Images of discontinuities close to the source side of the specimen
Become less clearly defined as:不连续性靠近样件上源的一侧它的清晰度
下降是因为?

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