Department of Radiology, Hoag Hospital Newport Beach, Newport Beach, CA.
Clin Nucl Med. 2023 Jan 1;48(1):95-97. doi: 10.1097/RLU.0000000000004391. Epub 2022 Sep 21.
A 67-year-old woman presented with shortness of breath and a ventilation/perfusion scan was performed. Initial images demonstrated mismatched bilateral apical defects that would be classified as high probability for pulmonary emboli. However, it was unusual that the defects were only in the bilateral apices. Investigation discovered that 99m Tc-MAA was administered while the patient was in a seated position. Repeat scan the following day with the patient in the correct, supine, position during 99m Tc-MAA administration demonstrated no defects. In this case, incorrect patient positioning could have resulted in an incorrect diagnosis of pulmonary emboli and inappropriate treatment of the patient.
一位 67 岁女性因呼吸急促就诊，进行了通气/灌注扫描。初始图像显示双侧肺尖部位不匹配的缺陷，这被归类为肺栓塞的高概率。然而，这些缺陷仅出现在双侧肺尖部位是不寻常的。调查发现， 99mTc-MAA 给药时患者处于坐姿。第二天，在正确的仰卧位患者， 99mTc-MAA 给药期间进行重复扫描，显示无缺陷。在这种情况下，患者的体位不正确可能导致肺栓塞的误诊和对患者的不适当治疗。
