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Denoising parameter dependence of coronary artery depictability in compressed sensing magnetic resonance angiography

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Abstract

Using numerical indices and visual evaluation, we evaluated the dependence of coronary-artery depictability on the denoising parameter in compressed sensing magnetic resonance angiography (CS-MRA). This study was conducted to clarify the acceleration factor (AF) and denoising factor (DF) dependence of CS-MRA image quality. Vascular phantoms and clinical images were acquired using three-dimensional CS-MRA on a clinical 1.5 T system. For the phantom measurements, we compared the full width at half maximum (FWHM), sharpness, and contrast ratio of the vascular profile curves for various AFs and DFs. In the clinical cases, the FWHM, sharpness, contrast ratio, signal-to-noise ratio, noise level values, and visual evaluation results were compared for various DFs. Phantom image analyses demonstrated that the respective measurements of the FWHM, sharpness, and contrast ratios did not significantly change with an increase in AF. The FWHM and sharpness measurements slightly changed with the DF level. However, the contrast ratio tended to increase with an increase in the DF level. In the clinical cases, the FWHM and sharpness showed no significant differences, even when the DF level was changed. However, the contrast ratio tended to decrease as the DF level increased. When the DF levels of the clinical cases increased, the background signals of the myocardium, fat, and noise levels decreased. We investigated the dependence of the coronary-artery depictability on AF and DF using CS-MRA. Analysis of the coronary-artery profile curves indicated that a better image quality was achieved with a stronger DF on coronary CS-MRA.

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Abbreviations

CS-MRI:

Compressed sensing magnetic resonance imaging

CS-MRA:

Compressed sensing magnetic resonance angiography

PI-MRA:

Parallel imaging magnetic resonance angiography

SENSE:

Sensitivity encoding

AF:

Acceleration factor

DF:

Denoising factor

bSSFP:

Balanced steady-state free precession

FWHM:

Full width at half maximum

SNR:

Signal-to-noise ratio

RCA:

Right coronary artery

LAD:

Left anterior ascending

LCX:

Left circumflex

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Acknowledgements

The authors would like to thank Mr. Ryona Abe and Mr. Norihito Miura for their assistance with this study. This work was partially supported by JSPS KAKENHI (Grant 18K07703).

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Authors and Affiliations

  1. Department of Radiological Technology, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan

    Junji Takahashi, Kei Fukuzawa & Yoshinori Tsuji

  2. Health Sciences, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan

    Junji Takahashi & Yoshio Machida

  3. Health Management Center, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan

    Yuki Ohmoto-Sekine

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  1. Junji Takahashi
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  2. Yoshio Machida
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  3. Kei Fukuzawa
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  4. Yoshinori Tsuji
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  5. Yuki Ohmoto-Sekine
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Correspondence to Junji Takahashi.

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All procedures performed in studies involving human participants followed the ethical standards of the Institutional Review Board (IRB) of our hospital. As a retrospective study, the IRB was obtained without patients’ informed consent.

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Takahashi, J., Machida, Y., Fukuzawa, K. et al. Denoising parameter dependence of coronary artery depictability in compressed sensing magnetic resonance angiography. Radiol Phys Technol (2024). https://doi.org/10.1007/s12194-024-00787-w

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  • DOI: https://doi.org/10.1007/s12194-024-00787-w

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