On the utility of MIBG SPECT/CT in evaluating cardiac sympathetic dysfunction in lewy body diseases

Hayato Odagiri, Toru Baba, Yoshiyuki Nishio, Osamu Iizuka, Minoru Matsuda, Kentaro Inoue, Akio Kikuchi, Takafumi Hasegawa, Masashi Aoki, Atsushi Takeda, Yasuyuki Taki, Etsuro Mori

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Background Abnormal cardiac uptake of 123I-metaiodobenzylguanidine (123I-MIBG) is a diagnostic marker of Lewy body diseases (LBDs), e.g., Parkinson's disease (PD) and dementia with Lewy bodies (DLB). Planar imaging is generally used to assess cardiac sympathetic dysfunction in 123I-MIBG scintigraphy; however, its clinical utility requires further improvement. We hypothesized that the co-registration of single-photon emission tomography (SPECT) and computed tomography (CT) images would improve the diagnostic accuracy of 123IMIBG cardiac scintigraphy for LBDs. This study sought to evaluate the effects of SPECT/ CT imaging on 123I-MIBG cardiac scintigraphy for diagnosing LBDs. Methods We retrospectively investigated data of 54 patients (consecutive 18 patients in each PD, DLB, and idiopathic normal pressure hydrocephalus [iNPH] groups) who underwent 123IMIBG cardiac scintigraphy (planar and SPECT/CT) because of suspected LBDs at the Tohoku University hospital from June 2012 to June 2015. We compared the diagnostic accuracies of the conventional planar 123I-MIBG method and SPECT/CT methods (manual and semi-automatic). Results In the conventional planar analysis, 123I-MIBG uptake decreased only in the DLB group compared with the iNPH group. In contrast, the SPECT/CT analysis revealed significantly lower 123I-MIBG uptake in both the PD and DLB groups compared with the iNPH group. Furthermore, a receiver operating characteristic analysis revealed that both the manual and semi-automatic SPECT/CT methods were superior to the conventional planar method in differentiating the 3 disorders. Conclusions SPECT/CT 123I-MIBG cardiac scintigraphy can detect mild cardiac sympathetic dysfunction in LDBs. Our results suggest that the SPECT/CT technique improves diagnostic accuracy for LBDs.

Original languageEnglish
Article numbere0152746
JournalPloS one
Volume11
Issue number4
DOIs
Publication statusPublished - 2016 Apr

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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