Journal of Nuclear Cardiology

, Volume 25, Issue 2, pp 407–415 | Cite as

Usefulness of abdominal belt for restricting respiratory cardiac motion and improving image quality in myocardial perfusion PET

  • Yasutaka Ichikawa
  • Yoya Tomita
  • Masaki Ishida
  • Shigeki Kobayashi
  • Kan Takeda
  • Hajime Sakuma
Original Article

Abstract

Background

The current study evaluated the usefulness of a belt technique for restricting respiratory motion of the heart and for improving image quality of 13N-ammonia myocardial PET/CT, and it assessed the tolerability of the belt technique in the clinical setting.

Methods

Myocardial 13N-ammonia PET/CT scanning was performed in 8 volunteers on Discovery PET/CT 690 with an optical respiratory motion tracking system. Emission scans were performed with and without an abdominal belt. The amplitude of left ventricular (LV) respiratory motion was measured on respiratory-gated PET images. The degree of erroneous decreases in regional myocardial uptake was visually assessed on ungated PET images using a 5-point scale (0 = normal, 1/2/3 = mild/moderate/severe decrease, 4 = defect). The tolerability of the belt technique was evaluated in 53 patients.

Results

All subjects tolerated the belt procedure. The amplitude of the LV respiratory motion decreased significantly with the belt (8.1 ± 7.1 vs 12.1 ± 6.1 mm, P = .0078). The belt significantly improved the image quality scores in the anterior (0.29 ± 0.81 vs 0.71 ± 1.04, P = .015) and inferior (0.33 ± 0.92 vs 1.04 ± 1.04, P < .0001) wall. No adverse events related to the belt technique were observed.

Conclusions

The belt technique restricts LV respiratory motion and improves the image quality of myocardial PET/CT, and it is well tolerated by patients.

Keywords

PET/CT imaging N-13 ammonia image quality image artifacts PET 

Abbreviations

CT

Computed tomography

LV

Left ventricular

PET

Positron emission tomography

SPECT

Single-photon emission computed tomography

Notes

Disclosure

The authors report no conflicts of interest to disclose.

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Copyright information

© American Society of Nuclear Cardiology 2016

Authors and Affiliations

  • Yasutaka Ichikawa
    • 1
  • Yoya Tomita
    • 1
  • Masaki Ishida
    • 1
  • Shigeki Kobayashi
    • 1
  • Kan Takeda
    • 1
  • Hajime Sakuma
    • 1
  1. 1.Department of RadiologyMie University HospitalTsuJapan

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