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Meeting ReportOncology: Clinical Therapy and Diagnosis

Zero TE-based PET/MR attenuation correction in patients with oral cavity cancer

Tetsuya Tsujikawa, Masafumi Kanno, Norihiko Narita, Shigeharu Fujieda and Hidehiko Okazawa
Journal of Nuclear Medicine May 2020, 61 (supplement 1) 1299;
Tetsuya Tsujikawa
1Biomedical Imaging Research Center University of Fukui Fukui Japan
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Masafumi Kanno
2Department of Otolaryngology University of Fukui Fukui Japan
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Norihiko Narita
2Department of Otolaryngology University of Fukui Fukui Japan
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Shigeharu Fujieda
2Department of Otolaryngology University of Fukui Fukui Japan
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Hidehiko Okazawa
1Biomedical Imaging Research Center University of Fukui Fukui Japan
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Abstract

1299

Objectives: To demonstrate the feasibility of zero-echo-time (ZTE) MR imaging for jaw bones and to evaluate the quantitative performance of 2-[18F]-fluoro-2-deoxy-D-glucose (18F-FDG) PET/MRI with ZTE-based attenuation correction (ZTE-AC) compared with PET/CT and PET/MRI with Dixon-MR-based AC (MR-AC) in patients with oral cavity cancer (OCC).

Methods: Thirteen patients with OCC underwent a whole-body 18F-FDG PET/CT scan and a subsequent regional PET/MR scan with MR-AC and ZTE-AC in one day. The standardized uptake values (SUVs) were measured on PET/CT (SUVCT-AC), PET/MRI with MR-AC (SUVMR-AC), and with ZTE-AC (SUVZTE-AC). The SUVs were correlated and compared with each other.

Results: ZTE MR images minimized the effects of metal artifacts from dentures and ZTE-AC maps correctly delineated the jaw bones. SUVMR-AC and SUVZTE-AC showed significant positive correlations with SUVCT-AC (Pearson’s r = 0.95 and r = 0.98, respectively). The means ± SD of SUVCT-AC, SUVMR-AC and SUVZTE-AC were 12.8 ± 6.7, 12.8 ± 6.6, and 13.9 ± 7.1, respectively. SUVZTE-AC was significantly higher than SUVCT-AC (p < 0.05) whereas there was no significant difference between SUVCT-AC and SUVMR-AC or between SUVMR-AC and SUVZTE-AC.

Conclusions: The ZTE MR images clearly delineate the jaw bones while minimizing the effects of metal artifacts. The ZTE-AC method in 18F-FDG PET/MRI reduces the underestimation of tracer uptake by MR-AC errors of jaw bones and improves the quantitative performance in patients with OCC.

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Journal of Nuclear Medicine
Vol. 61, Issue supplement 1
May 1, 2020
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Zero TE-based PET/MR attenuation correction in patients with oral cavity cancer
Tetsuya Tsujikawa, Masafumi Kanno, Norihiko Narita, Shigeharu Fujieda, Hidehiko Okazawa
Journal of Nuclear Medicine May 2020, 61 (supplement 1) 1299;

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Zero TE-based PET/MR attenuation correction in patients with oral cavity cancer
Tetsuya Tsujikawa, Masafumi Kanno, Norihiko Narita, Shigeharu Fujieda, Hidehiko Okazawa
Journal of Nuclear Medicine May 2020, 61 (supplement 1) 1299;
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