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Ictal SPECT using an attachable automated injector: Clinical usefulness in the prediction of ictal onset zone

Title
Ictal SPECT using an attachable automated injector: Clinical usefulness in the prediction of ictal onset zone
Authors
Lee J.-J.Lee S.K.Choi J.W.Kim D.-W.Park K.I.Kim B.S.Kang H.Lee D.S.Lee S.-Y.Kim S.H.Chung C.K.Nam H.W.Kim K.K.
Ewha Authors
김범산
SCOPUS Author ID
김범산scopus
Issue Date
2009
Journal Title
Acta Radiologica
ISSN
0284-1851JCR Link
Citation
vol. 50, no. 10, pp. 1160 - 1168
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Background: Ictal single-photon emission computed tomography (SPECT) is a valuable method for localizing the ictal onset zone in the presurgical evaluation of patients with intractable epilepsy. Conventional methods used to localize the ictal onset zone have problems with time lag from seizure onset to injection. Purpose: To evaluate the clinical usefulness of a method that we developed, which involves an attachable automated injector (AAI), in reducing time lag and improving the ability to localize the zone of seizure onset. Material and Methods: Patients admitted to the epilepsy monitoring unit (EMU) between January 1, 2003, and June 30, 2008, were included. The definition of ictal onset zone was made by comprehensive review of medical records, magnetic resonance imaging (MRI), data from video electroencephalography (EEG) monitoring, and invasive EEG monitoring if available. We comprehensively evaluated the time lag to injection and the image patterns of ictal SPECT using traditional visual analysis, statistical parametric mapping-assisted, and subtraction ictal SPECT coregistered to an MRI-assisted means of analysis. Image patterns were classified as localizing, lateralizing, and nonlateralizing. The whole number of patients was 99: 48 in the conventional group and 51 in the AAI group. Results: The mean (SD) delay time to injection from seizure onset was 12.4±12.0 s in the group injected by our AAI method and 40.4±26.3 s in the group injected by the conventional method (P0.000). The mean delay time to injection from seizure detection was 3.2±2.5 s in the group injected by the AAI method and 21.4±9.7 s in the group injected by the conventional method (P0.000). The AAI method was superior to the conventional method in localizing the area of seizure onset (36 out of 51 with AAI method vs. 21 out of 48 with conventional method, P0.009), especially in non-temporal lobe epilepsy (non-TLE) patients (17 out of 27 with AAI method vs. 3 out of 13 with conventional method, P0.041), and in lateralizing the seizure onset hemisphere (47 out of 51 with AAI method vs. 33 out of 48 with conventional method, P0.004). Conclusion: The AAI method was superior to the conventional method in reducing the time lag of tracer injection and in localizing and lateralizing the ictal onset zone, especially in patients with non-TLE. © 2009 Informa UK Ltd.
DOI
10.3109/02841850903215926
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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