题目内容

Which contrast agent is used routinely during a Coronary CT angiogram?

A. Gadolinium
Barium Sulfate
C. Iodine

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The CT values in the Hounsfield Unit(HU) scale are proportional to the measured attenuation coefficient μ of any tissue, scaled by the attenuation coefficient of water. The HU values for water and air are respectively:

A. -1000 and 0
B. 0 and -1000
C. 0 and -5000

When imaging the liver, multiple focus areas should be used, because

A. We want to see the blood flow in the portal vein
B. It's a big organ
C. We want to increase the penetration of the sound beam

质量控制检测主要包括两个部分：生理化学测试和微生物测试。下列哪个测试是微生物测试不是生理化学测试：

A. ) 鲎变形细胞溶解物 (LAL).
B. ) 气相色谱法 (GC).
C. ) Gamma谱分析.

Look really carefully on the third image above.Above the bladder there is some additional hardware.Can you identify it?______