Respiration Motion Correction Improves the Interpretation of Myocardial Perfusion Imaging

呼吸位移校正改善心肌灌注影像的判讀

劉芳馨(Fang-Shin Liu) ； 柯紀綸(Chi-Lun Ko) ； 顏若芳(Ruoh-Fang Yen)

《核子醫學暨分子影像雜誌》 33卷3期 (2020/09) Pp. 189-193

https://doi.org/10.6332/ANMMI.202009_33(3).0007

摘要

A 69-year-old male patient, who had hypertension, dyslipidemia, and smoking, was referred to perform a treadmill myocardial perfusion imaging (MPI) after an episode of chest tightness. The stress and rest images revealed fixed perfusion defects in the inferoseptal, inferior, and basal anterior walls. However, respiratory motion was considered due to blurred mid to basal anterior and inferior walls, and distorted left ventricular chamber shapes. Motion correction by motion compensation technique was performed. The corrected images showed only mildly reversible perfusion defect in the inferior wall and apex. Respiratory motion is not uncommon for MPI using cadmium-zinc-telluride camera. Careful identification and correction help avoid misinterpretation of the images.

關鍵字

respiratory motion ； motion correction ； myocardial perfusion imaging

並列摘要

一位有高血壓、高血脂及抽菸病史的69歲男性病人，因胸悶接受運動負荷心肌灌注掃描，影像顯示左心室從前壁、下壁至下中膈有廣泛的非可逆性灌流缺損。進一步分析發現前壁後段及下壁影像模糊且左心室形狀變形，判斷是因呼吸位移造成的假影。以位移補償技術進行位移校正後，只剩下輕度可逆性灌流缺損於下壁及心尖。呼吸位移在以碲鋅鎘（cadmium-zinc-telluride, CZT）造影儀進行心臟灌注造影時並不少見，小心判斷位移與校正可減少呼吸位移假影造成影像判讀的錯誤。

並列關鍵字

呼吸位移 ； 位移校正 ； 心肌灌注掃描