CT image not only shows its density with different gray scales , but also can be used to explain the difference of density degree with X-ray absorption coefficient , which has a quantity.
举一反三
- The differential absorption of the x-ray beam by different tissues produces various image density, which on CT scans are measured in Hounsfield units (), which of the following description below is NOT correct: ( ) A: Air is measured -1000 HU B: Fat is measured -120 Hu C: Bone is measured +1000 Hu D: Calcification is measured from 80 to 100 Hu
- The ultracentrifuge can also be used to separate cell components on the basis of their buoyant density, independently of their
- The ultracentrifuge can also be used to separate cell components on the basis of their buoyant density, independently of their size or shape.
- Which materials can be used for its different parts?
- 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