Ida M, Honda E
Dentomaxillofac Radiol. 1989 Feb;18(1):31-5. doi: 10.1259/dmfr.18.1.2599237.
The computed tomographic (CT) numbers of 182 normal parotid glands were measured in patients ranging in age from 1 to 81 years, and of 172 normal submandibular glands with an age range of 1-85 years. The mean CT number (+/- s.d.) of the parotid and the submandibular glands was -10 +/- 24 Hounsfield units (HU) and 41 +/- is HU respectively. Sex and intra-individual differences in the CT numbers were small, but significant linear decreases were found with age in both glands. The mean annual decrease was 0.5 HU.
对年龄在1至81岁的患者的182个正常腮腺以及年龄在1至85岁的172个正常下颌下腺的计算机断层扫描（CT）值进行了测量。腮腺和下颌下腺的平均CT值（±标准差）分别为-10±24亨氏单位（HU）和41±18 HU。CT值在性别和个体内差异较小，但两个腺体的CT值均随年龄呈显著线性下降。平均每年下降0.5 HU。
