geometric unsharpness

pe·num·bra

(pĕ-nŭm'bră) 1. radiology The blurred margin of an image. 2. radiation physics The region at the edges of a radiation beam over which a rapid change in dosage rate occurs.
Synonym(s): geometric unsharpness. [Mod. L., fr. L. paene, almost, + umbra, shadow]

pe·num·bra

(pĕ-nŭm'bră) 1. radiology the blurred margin of an image. 2. radiation physics the region at the edges of a radiation beam over which a rapid change in dosage rate occurs.
Synonym(s): geometric unsharpness. [Mod. L., fr. L. paene, almost, + umbra, shadow]

单词	geometric unsharpness
释义	DictionarySeepenumbra geometric unsharpness pe·num·bra (pĕ-nŭm'bră) 1. radiology The blurred margin of an image. 2. radiation physics The region at the edges of a radiation beam over which a rapid change in dosage rate occurs. Synonym(s): geometric unsharpness. [Mod. L., fr. L. paene, almost, + umbra, shadow] pe·num·bra (pĕ-nŭm'bră) 1. radiology the blurred margin of an image. 2. radiation physics the region at the edges of a radiation beam over which a rapid change in dosage rate occurs. Synonym(s): geometric unsharpness. [Mod. L., fr. L. paene, almost, + umbra, shadow] LegalSeePenumbra
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