The importance of accurate and early diagnosis of dementia with Lewy bodies (DLB) lies in its pharmacological management. Delayed imaging of cardiac 123I-MIBG scintigraphy allows differentiation between DLB and other neurodegenerative diseases with cognitive impairment.The aim of this study was to assess the utility of early imaging of cardiac 123I-MIBG scintigraphy for differentiating DLB from others neurodegenerative disease with cognitive impairment. Material and methods: We assess retrospectively 106 patients (51 men, mean age 78 years) with cognitive impairment that underwent a cardiac 123I-MIBG study. Planar images were acquired in anterior view of the thorax 15min (early) and 4h (delayed) after tracer administration. The heart-to-mediastinum ratios (HMR) at 15m (HMR15m) and at 4h (HMR4h) were obtained. Results: After four years, 52 patients were diagnosed of DLB.HMR15m and HMR4h were significantly inferior in DLB respect to the others neurodegenerative diseases (1,27±0,15 vs 1,76±0,15,p<0,05) and (1,14±0,13 vs 1,68±0,19,p<0.01), respectively. The ROC analysis showed a HMR15m cut off point of 1.56 to differentiated DLB from the other dementias with a sensitivity and a specificity of 98%. Conclusions: Early imaging of cardiac 123I-MIBG scintigraphy can help to differentiate DLB from other neurodegenerative diseases with cognitive impairment. © 2012 Elsevier España, S.L. y SEMNIM.
|Journal||Revista Espanola de Medicina Nuclear e Imagen Molecular|
|Publication status||Published - 1 Mar 2013|
- 123 I-MIBG
- Cardiac MIBG scintigraphy
- Dementia with Lewy Bodies
- Early imaging