骨可根据形状分类，有长骨、短骨、扁骨、不规则骨和含气骨。

Bones may be classified according to their shape. There are long bones, short bones, flat bones, irregular bones and pneumatic bones.

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目的：评价螺旋CT三维成像技术在扁骨和不规则骨中的诊断作用。

Objective:To evaluate the usefulness of three-dimensional (3D) helical CT in the lesions of flat bones and irregular bones.

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报告4例全身性骨纤(选自一组356例骨纤维异常增殖症，发病率约占1%)，3例以病理证实，病变侵犯全身所有长、短、扁骨和不规则骨。

This is to report 4 cases of systemic fibrous dysplasia selected from a group of 356 cases of the disease with a incidence of 1%. 3 of them were proved pathologically.

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报告4例全身性骨纤(选自一组356例骨纤维异常增殖症，发病率约占1%)，3例以病理证实，病变侵犯全身所有长、短、扁骨和不规则骨。

This is to report 4 cases of systemic fibrous dysplasia selected from a group of 356 cases of the disease with a incidence of 1%. 3 of them were proved pathologically.

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