与通常采用的晕环法相比，该方法具有更高的准确性。

The accuracy is higher than halo method, which is generally used .

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最初，这些斑点周围先有晕环，是由成千上万的小孢子组成的。

Initially, these spots have colored halos around them, which are made of thousands of tiny spores.

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慢性病灶有收缩感，边缘较锐利，信号较均匀，周围无晕环征象，增强后无强化。

The chronic lesions had an appearance of shrinking, sharp edge, even signals, and had no lunar circle phenomena and obvious enhancement.

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