Extracardiac findings by low dose CT attenuation correction during SPECT/CT myocardial perfusion imaging / 中华核医学与分子影像杂志

ABSTRACT

Objective To investigate the value of CT in detecting incidental extracardiac findings (IEFs) when used for attenuation correction during SPECT/CT myocardial perfusion imaging (MPI).Methods A total of 520 patients (288 males,232 females,average age 65.8 years) who underwent SPECT/CT MPI between July 2014 and February 2016 were retrospectively analyzed.Low dose CT attenuation correction was used during MPI.IEFs of lung,mediastinum and chest wall,large blood vessels,spine,and part of upper abdomen were recorded independently.All findings were divided into three categories:IEFs requiting further examination and treatment measures taken immediately (group A),IEFs requiring follow-up or further examination (group B),IEFs need no further treatment (group C).Results IEFs (n =356) were observed in 52.31％ (272/520) of the patients,with 24 cases in group A (4.62％,24/520),105 cases in group B (20.19％,105/520) and 143 cases in group C (27.50％,143/520).There were 158 clinically significant IEFs in 129 patients (24.81％,129/520),including 5(0.96％,5/520) with newly diagnosed malignancy.Conclusion IEFs detected by CT used for attenuation correction during SPECT/CT MPI are not uncommon,including a few cases with clinically significant findings.