能谱CT对甲状腺密度的测量方法研究

Measuring thyroid density by energy spectrum CT

目的 :建立能谱CT单能量CT值与组织密度的关系,试图通过测量CT值来间接计算甲状腺的密度,为测量甲状腺质量提供基础。方法:选取不同成分的固体与液体、液体与液体的混合液、实体甲状腺组织,分别测量CT值与其密度,分析两者的关系。结果:自然界中,物质的密度与其CT值没有相关关系;当组织由相对固定的成分组成且每种成分含量不同时,其CT值与组织中大原子序数的物质含量直接相关;甲状腺组织的CT值与其密度及其内的碘含量直接相关。结论:甲状腺的能谱CT值与其密度之间具备相关关系,可以用能谱CT来间接测量甲状腺组织的密度。

Objective To investigate the relationship between the single energy CT value and the tissue density and further evaluate the mass of thyroid. Methods Different substances respectively composed of liquid and solid, liquid and liquid,thyroid gland were selected, and the relationship was investigated between the single energy CT value and the tissue density.Results The CT value was closely related to the content of high atomic number substance. The CT value of thyroid was closely related to the content of iodine. Conclusion It is feasible to measure the thyroid density by the energy spectrum CT.