[Effects of depression on myocardial perfusion scintigraphy]

The relationship between depression and coronary artery disease is well established; however assessment of this relationship using functional and semi-quantitative imaging [myocardial perfusion scintigraphy] was lacking. The aim of this study was to assess the relationship between the severity of depression and the severity of myocardial perfusion abnormality. Patients were assessed with rest/stress 99mTc-MIBI myocardial perfusion scintigraphy using Single Photon Emission Computed Tomography [SPECT] and Beck Depression Inventory [BDI-II]. Visual and semi-quantitative assessment of myocardial perfusion score [MPS] in a five-scale measurement for standard 20-segment-model were used. When all patients [n=167] were evaluated, no correlation was found between MPS and BDI-score. Considering only those with significant perfusion abnormality [MPS<90, n=38], negative correlation was found between MPS and BDI score [r= -0.641, p=0.017]. Also higher BDI scores were recorded for patients with inferior wall infarction when compared with those with normal or near-normal MPS [MPS>95] [p=0.097], but other myocardial walls failed to show such association. In patients with significant perfusion abnormality, the greater is this abnormality the more severe is the depression. Also patients with inferior wall infarction, have a higher BDI-score as compared with normal subjects

[Agreement of two methods of planar and SPECT scintigraphy with 99mTc- RBC in detection of liver Hemangioma]

Hemangiomas are the most frequent benign tumors of the liver and detecting them from metastasis or other malignant hepatic tumors is of outmost importance. 99mTc- RBC scan is highly specific and is the method of choice for this differentiation. This scintigraphy is performed in Planar and SPECT modes. These two procedures are in agreement most of the times, however since SPECT is more expensive and time consuming we planned a study to evaluate the agreement of these two methods. Sixty two patients [age range 20-80 yr, mean age 42 yr], 41 female [67%] and 20 male [33%], who were under evaluation for liver mass detected on abdominal ultrasound or CT scan, underwent 99mTc- RBC scan with both Planar and SPECT methods. The data was processed by computer and SPSS software [11.5]. Planar scan was positive in 42% and negative in 59% of cases, while for SPECT study these values were 68.9% and 31.1%, respectively. The Kappa value for planar and SPECT scan results was 48%, and there were 17 lesions [27%] which were detected only by SPECT. SPECT scan defined 35% of the posteriorly located hemangiomas, and 58.3% of hemangiomas smaller than 3 cm, which were not detected by planar scans. Also 75% of patients with multiple hepatic lesions showed more lesions by SPECT as compared to planar scan. Since there is a weak agreement between SPECT and Planar scan, SPECT is considered the more reliable method in diagnosis of liver hemangioma and this is especially true when the hemangioma is of small size, has a posterior location or in cases of multiple lesions