Shih W J, Magoun S, Lahr B
Nuclear Medicine Service, Department of Veterans Affairs Medical Center, Lexington, Kentucky 40511.
Clin Nucl Med. 1994 Mar;19(3):181-3. doi: 10.1097/00003072-199403000-00002.
Iodine-contained contrast media of a recent arteriogram can block normal thyroid uptake of Tc-99m pertechnetate or radioiodine, resulting in virtual nonvisualization of the thyroid gland and showing a prominent salivary activity. In Tc-99m pertechnetate thyroid imaging, however, diffuse soft-tissue uptake in the anterior neck surrounding a fluid containing (cystic) lesion may standout as photopenia. The authors present two patients with recent contrast radiographic procedures who underwent Tc-99m pertechnetate imagings that demonstrated photopenic lesions: one was a thyroid cyst and the other confirmed an abscess.
近期动脉造影使用的含碘造影剂可阻断甲状腺对锝-99m高锝酸盐或放射性碘的正常摄取，导致甲状腺几乎不显影，并出现显著的唾液腺显影。然而，在锝-99m高锝酸盐甲状腺显像中，含液（囊性）病变周围颈部前方弥漫性软组织摄取可能表现为放射性稀疏。作者报告了两名近期接受过造影X线检查的患者，他们接受了锝-99m高锝酸盐显像，显示出放射性稀疏病变：一例为甲状腺囊肿，另一例确诊为脓肿。
