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[A basic study of multi-gated single photon emission computed tomography with thallium-201]

Y Sugioka1, I Adachi, K Tabuchi

  • 1First Department of Radiology, Osaka Medical College.

Kaku Igaku. the Japanese Journal of Nuclear Medicine
|September 1, 1993
PubMed
Summary
This summary is machine-generated.

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This study found that 64x64 matrix with 8 frames per cardiac cycle provides adequate image quality for multi-gated SPECT. This acquisition mode allows for the assessment of cardiac function, including percent wall thickening.

Area of Science:

  • Nuclear Medicine
  • Cardiovascular Imaging
  • Medical Imaging Technology

Background:

  • Multi-gated SPECT is commonly acquired using a 64x64 matrix and 8 frames per cardiac cycle.
  • The optimal acquisition parameters for multi-gated SPECT have not been definitively established.

Purpose of the Study:

  • To evaluate the suitability of different acquisition modes for multi-gated SPECT.
  • To compare image quality and functional assessment capabilities across various matrix sizes and frame rates.

Main Methods:

  • Five normal volunteers underwent multi-gated 201Tl SPECT using a multi-detector SPECT system.
  • Acquisition modes included 128x128/16F, 128x128/8F, 64x64/32F, and 64x64/8F.
  • Percent wall thickening (%WT) was calculated for 9 cases using the 64x64/8F mode.

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Main Results:

  • Image quality was superior with 64x64 matrix compared to 128x128 matrix, particularly at the end-diastolic phase.
  • The 64x64/8F acquisition mode, despite having fewer frames, allowed visualization of systolic and diastolic phases.
  • %WT could be reliably calculated using the 64x64/8F mode, with values such as 48±15% (septal basal) and 65±29% (apex).

Conclusions:

  • The 64x64 matrix with 8 frames per cardiac cycle is a suitable acquisition mode for multi-gated SPECT.
  • This mode provides sufficient image quality for assessing cardiac function, including percent wall thickening.