题目内容

The diagnosis of lung tumours with CT imaging methods is routinely used due to:

A. a) the small difference in density between the lungs and the tumours
B. b) the large contrast between low density, air-filled lung tissue and solid lung tumour masses
C. c) the absence of other imaging modalities to diagnose tumours

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

A. Gadolinium
Barium Sulfate
C. Iodine

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.

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