Evaluation of radiation-induced myocardial damage using iodine-123 β-methyl-iodophenyl pentadecanoic acid scintigraphy

Rei Umezawa, Kei Takase, Keiichi Jingu, Kentaro Takanami, Hideki Ota, Tomohiro Kaneta, Ken Takeda, Haruo Matsushita, Hisanori Ariga, Shoki Takahashi, Shogo Yamada

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We evaluated radiation-induced myocardial damage using iodine-123 β-methyl-iodophenyl pentadecanoic acid (1-123 BMIPP) scintigraphy. Between May 2010 and April 2011 we performed 1-123 BMIPP scintigraphy for patients who had maintained complete response to curative radiotherapy (RT) for esophageal cancer for more than six months. We compared the area of the myocardium in the RT fields with that of reduced 1-123 BMIPP uptake using a 15-segment model that is based on axial computed tomography (CT) images. We classified the segments into three categories: segments receiving 40 Gy (Segment 40 Gy), segments receiving 60 Gy (Segment 60 Gy) and segments out of the radiation fields (Segment 0 Gy). A segment with reduced uptake in the RT fields was defined as positive. A total of 510 segments in 34 patients were used for analysis. The median interval from completion of RT to I-123 BMIPP scintigraphy was 22 months (range, 6-103 months). The numbers of Segment 0 Gy, Segment 40 Gy and Segment 60 Gy were 324, 133 and 53, respectively. Reduced uptake was detected in 42.9% (57/133) of Segment 40 Gy, 67.9% (36/53) of Segment 60 Gy and 13.3% (43/324) of Segment 0 Gy. The odds ratios of 40 Gy and 60 Gy compared with regions out of the RT fields were 5.2 (95% confidence interval [CI]: 3.7-7.4) and 15.4 (95% CI: 6.9-34.6), respectively. Reduced myocardial 1-123 BMIPP uptake in RT fields, suggesting RT-induced myocardial damage, was frequently observed. 1-123 BMIPP myocardial scintigraphy may be useful for identifying RT-induced myocardial damage.

Original languageEnglish
Pages (from-to)880-889
Number of pages10
JournalJournal of radiation research
Volume54
Issue number5
DOIs
Publication statusPublished - 2013 Sep

Keywords

  • 1-123 BMIPP
  • Esophageal cancer
  • Heart
  • Radiation-induced myocardial damage
  • Radiotherapy

ASJC Scopus subject areas

  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Health, Toxicology and Mutagenesis

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