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Annals of Nuclear Medicine

, Volume 20, Issue 2, pp 107–114 | Cite as

Comparison of201Tl-chloride SPECT with99mTc-MIBI SPECT in the depiction of malignant head and neck tumors

  • Noriaki Tomura
  • Osamu Watanabe
  • Satoshi Takahashi
  • Ikuo Sakuma
  • Takahiro Otani
  • Toshiaki Nishii
  • Jiro Watarai
Original Article

Abstract

Objective

Comparison of201T1 chloride SPECT (Tl-SPECT) with99mTc-MIBI SPECT (MIBI-SPECT) in the depiction of malignant head and neck tumors was prospectively studied.

Methods

Forty-one patients with various tumors of the head and neck were included in this prospective study. Histologically, 36 patients had squamous cell carcinomas, 3 undifferentiated carcinomas, 1 transitional cell carcinoma, and 1 MALT lymphoma. All patients underwent a simultaneous dual-isotope SPECT of the head and neck with201Tl and99mTc-MIBI. Dual-isotope SPECT for early (n = 41) and delayed acquisition (n = 21) was performed. Qualitatively, 3 observers evaluated both Tl-SPECT and MIBI-SPECT individually. The interpretation criteria were graded as grade 1 (no abnormal increased uptake) to 5 (definitely increased uptake of a degree equal to or greater than that of normal salivary gland). Statistical analysis of the comparison of Tl-SPECT and MIBI-SPECT was performed. The interobserver difference was evaluated using the κ-coefficient. Quantitatively, T/N ratio (the ratio of the counts in the tumor divided by that in the normal nuchal muscles) and retention index were compared between Tl-SPECT and MIBI-SPECT.

Results

On both the early and delayed images, the grades of uptake of the tumor in Tl-SPECT were significantly higher than those in MIBI-SPECT by three observers. The grade of T1-uptake of the tumor on the delayed images was 5 for all observers (κ-coefficient =1); however, the κ-coefficient varied from 0.39 to 0.84 in early Tl-SPECT, and in early and delayed MIBI-SPECT. Statistical differences in T/N ratio were noted between early Tl-SPECT (2.87 ± 1.19) and MIBI-SPECT (2.48 ± 1.06), and between delayed Tl-SPECT (2.11 ± 0.70) and MIBI-SPECT ( 1.20 ± 0.48). The retention index of Tl-SPECT (0.81 ± 0.24) was significantly higher than that of MIBI-SPECT (0.52 ± 0.15).

Conclusions

The present study qualitatively and quantitatively showed that201T1 had higher accumulation in the tumor than99mTc-MIBI in both early and delayed images.

Key words

head and neck neoplasms 201T1 chloride 99mTc MIBI SPECT 

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Copyright information

© Springer 2006

Authors and Affiliations

  • Noriaki Tomura
    • 1
  • Osamu Watanabe
    • 1
  • Satoshi Takahashi
    • 1
  • Ikuo Sakuma
    • 1
  • Takahiro Otani
    • 1
  • Toshiaki Nishii
    • 1
  • Jiro Watarai
    • 1
  1. 1.Department of RadiologyAkita University School of MedicineAkitaJAPAN

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