Contained Rupture of a Thoracic Aortic Aneurysm Mimicking a Malignant Tumor: a Case Report / 대한핵의학회잡지

An 81-year-old man underwent F-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) to evaluate a mediastinal mass, which was discovered during the investigation for hemoptysis. The periphery of the mass abutting the aortic arch demonstrated heterogeneously increased FDG uptake, whereas most of the central portion of the mass was photopenic. The mass turned out to be an atheromatous organizing hematoma associated with contained aortic rupture.

Association Between Colonic18F-FDG Uptake and Glycemic Control in Patients with Diabetes Mellitus / 대한핵의학회잡지

Purpose@#Positron emission tomography/computed tomography (PET/CT) with 18F-fluorodeoxyglucose (FDG) is a useful imagingmodalitythat visualizes glucose utilization. Diffuse colonic FDG uptake is frequently observed in patients being treated fordiabetes mellitus (DM), especially with metformin. The aim of this study was to evaluate whether patients without increasedcolonic FDG uptake after taking oral hypoglycemic agents (OHA) are associated with insufficient glycemic control. @*Methods@#A total of 279 subjects who underwent FDG PET/CT scans for health examinations and had been diagnosed with DMand taken an OHA before the day of the FDG PET/CT were included. Colonic FDG uptake in the study subjects was visuallyassessed, and the maximal and mean standard uptake value (SUV) was measured. Fasting blood glucose and glycated hemoglobinA1c (HbA1c) levels at both baseline and follow-up visits as well as DM management were compared according to thecolonic FDG uptake. @*Results@#The mean age of study subjects was 48.8 years old, and 251 of subjects were male. Positive colonic FDG uptake wasobserved in 200 (71.7%) subjects. Fasting blood glucose and Hb1Ac levels on the day of FDG PET/CT were higher in subjectswithout positive colonic FDG uptake than those with positive colonic FDG uptake (p≤ 0.001). But there was no significantdifference between the two groups at follow-up visits. @*Conclusions@#Patients with DM who did not show increased colonic FDG uptake after taking OHA were associated with higherfasting blood glucose and HbA1c levels on the day of FDG PET/CT.

Assessment of Left Ventricular Ejection Fraction by Thallium-201 Myocardial SPECT-CT in Patients with Angina Pectoris: Comparison with 2D Echocardiography / 대한핵의학회잡지

PURPOSE: Left ventricular (LV) ejection fraction (EF) is an important parameter for assessing cardiac systolic function and predicting prognosis in patients with cardiovascular disease. The aim of this study was to evaluate the feasibility of assessing LVEF by Tl-201 hybrid myocardial single-photon emission computed tomography (SPECT)/CT using two attenuation correction methods in patients with angina pectoris.METHODS: A total of 339 patients with angina pectoris (62.8 ± 12.9 years, male:female = 206:133) were analyzed. All patients underwent Tl-201 myocardial SPECT/CT and transthoracic two-dimensional (2D) echocardiograph. We compared LVEF assessed by SPECT/CT using two attenuation correction methods: CT-based attenuation correction (CTAC) and non-attenuation correction (non-AC) methods and 2D echocardiography.RESULTS: LVEF assessed by either of the two attenuation correction techniques and 2D echocardiography showed moderate correlation in all patients with angina pectoris (r = 0.487 for CTAC and r = 0.473 for non-AC, p < 0.001). Results were similar in the subgroup of patients with perfusion abnormalities on myocardial SPECT/CT images. Overall diagnostic performances were similar for the CTAC and non-AC methods for evaluating normal and decreased LVEF by myocardial SPECT/CT.CONCLUSION: LVEF measured by the CTAC method of Tl-201-gated myocardial SPECT/CT was comparable with the conventional non-AC method in patients with angina pectoris and in the subgroup of patients with perfusion abnormality. Tl-201-gated myocardial hybrid SPECT/CT can be a reliable tool in the assessment of LVEF in clinic.

Assessment of Left Ventricular Ejection Fraction by Thallium-201 Myocardial SPECT-CT in Patients with Angina Pectoris: Comparison with 2D Echocardiography / 대한핵의학회잡지

PURPOSE@#Left ventricular (LV) ejection fraction (EF) is an important parameter for assessing cardiac systolic function and predicting prognosis in patients with cardiovascular disease. The aim of this study was to evaluate the feasibility of assessing LVEF by Tl-201 hybrid myocardial single-photon emission computed tomography (SPECT)/CT using two attenuation correction methods in patients with angina pectoris.@*METHODS@#A total of 339 patients with angina pectoris (62.8 ± 12.9 years, male:female = 206:133) were analyzed. All patients underwent Tl-201 myocardial SPECT/CT and transthoracic two-dimensional (2D) echocardiograph. We compared LVEF assessed by SPECT/CT using two attenuation correction methods: CT-based attenuation correction (CTAC) and non-attenuation correction (non-AC) methods and 2D echocardiography.@*RESULTS@#LVEF assessed by either of the two attenuation correction techniques and 2D echocardiography showed moderate correlation in all patients with angina pectoris (r = 0.487 for CTAC and r = 0.473 for non-AC, p < 0.001). Results were similar in the subgroup of patients with perfusion abnormalities on myocardial SPECT/CT images. Overall diagnostic performances were similar for the CTAC and non-AC methods for evaluating normal and decreased LVEF by myocardial SPECT/CT.@*CONCLUSION@#LVEF measured by the CTAC method of Tl-201-gated myocardial SPECT/CT was comparable with the conventional non-AC method in patients with angina pectoris and in the subgroup of patients with perfusion abnormality. Tl-201-gated myocardial hybrid SPECT/CT can be a reliable tool in the assessment of LVEF in clinic.