Slavin James D, Solis Veronica, Spencer Richard P
Department of Radiology, Saint Francis Hospital, Woodland Street, Hartford.
Clin Nucl Med. 2003 Sep;28(9):764-5. doi: 10.1097/01.rlu.0000082668.36781.78.
After a cesarean section, a woman had sharp left chest pain that radiated to the arm and was worse with inspiration. A chest radiograph revealed minimal left lung base atelectasis. A total of 5 mCi (185 mBq) Tc-99m macroaggregated albumin (MAA) was injected with the patient supine. A posterior oblique perfusion lung image revealed nearly absent perfusion of the left lung base. The patient was then injected with an equal quantity of Tc-99m MAA while prone. Images now demonstrated perfusion of the left lower lung. This might represent redistribution of fluid obscured by the atelectatic area, or the relief of pressure on pulmonary arteries to the left lower lobe by positional change.
剖宫产术后，一名女性出现左侧胸部剧痛，疼痛放射至手臂，吸气时加重。胸部X线片显示左肺底部有少量肺不张。患者仰卧位时注射了5毫居里（185兆贝可）的锝-99m大颗粒白蛋白（MAA）。后斜位肺灌注显像显示左肺底部几乎无灌注。然后让患者俯卧位，注射等量的锝-99m MAA。此时图像显示左下肺有灌注。这可能代表被肺不张区域遮盖的液体重新分布，或者体位改变减轻了左下叶肺动脉的压力。
