Effects of Pacemaker, Implantable Cardioverter–Defibrillator, and Left Ventricular Leads on CT-Based Attenuation Correction

Journal of Nuclear Medicine Technology

Kosuke Matsubara¹  Kichiro Koshida¹  Akira Suzuki¹ 

关键词: SPECT/CT;    CTAC;    pacemaker;    myocardial perfusion;   

DOI  :  10.2967/jnmt.113.133736

学科分类：医学（综合）

来源: Society of Nuclear Medicine

【 摘 要 】

CT-based attenuation correction (CTAC) of myocardial SPECT images has been becoming more popularand the application of SPECT/CT increasingbecause it prevents attenuation-induced image degradation. However, CTAC can be affected by overestimation of counts caused by metals. It is possible that pacemaker, left ventricle (LV), and implantable cardioverter-defibrillator (ICD) leads have an influence on myocardial SPECT findings. The present study investigated the impact of these leads on SPECT with CTAC. Methods: Pacemaker, LV, and ICD leads were examined using a simple phantom and a cardiac phantom. The effects of metal artifacts from leads in high-resolution mode and ultra-high-resolution mode were assessed using a simple phantom. Images and polar maps were generated from the cardiac phantom. Results: The pacemaker and LV leads essentially had no influence, whereas the ICD lead resulted in maximal (6%) overestimation in a study investigating which metals cause artifacts that affect CTAC. None of the leads seriously influenced CTAC when the cardiac phantom was used. Conclusion: Small pacemaker or ICD and LV leads will cause a slight overestimation, but CTAC should be used because it can correct attenuation of the inferior and anteroseptal walls on SPECT images.

【 授权许可】

Unknown