Incident angle-dependent gain correction for reflection images on ultrasound computed tomography

Yushi Tsubota; Takahide Terada; Atsuro Suzuki; Wenjing Wu; Kazuhiro Yamanaka; Hiroko Yamashita; Fumi Kato; Mutsumi Nishida; Megumi Satoh; Ken-ichi Kawabata

doi:10.1117/12.2548555

16 March 2020 Incident angle-dependent gain correction for reflection images on ultrasound computed tomography

Yushi Tsubota, Takahide Terada, Atsuro Suzuki, Wenjing Wu, Kazuhiro Yamanaka, Hiroko Yamashita, Fumi Kato, Mutsumi Nishida, Megumi Satoh, Ken-ichi Kawabata

Author Affiliations +

Proceedings Volume 11319, Medical Imaging 2020: Ultrasonic Imaging and Tomography; 113190N (2020) https://doi.org/10.1117/12.2548555
Event: SPIE Medical Imaging, 2020, Houston, Texas, United States

Abstract

We are performing clinical studies on breast cancer examinations at Hokkaido University Hospital with an ultrasound computed tomography (USCT) system. Our studies have revealed that some reflection images exhibit intensity inhomogeneity because ultrasound waves, shot by a 1-D ring array transducer, go non-vertically into the object surface. This trend significantly increases the burden of interpretation. Therefore, we developed a calibration method to remove this heterogeneity based on the distribution of the incident angle of waves that are estimated from the slope of the subject surface morphologically extracted from multi-slice reflection images. Results showed that applying this correction method to clinical images enabled the image contrast and uniformity to be successfully recovered.

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Yushi Tsubota, Takahide Terada, Atsuro Suzuki, Wenjing Wu, Kazuhiro Yamanaka, Hiroko Yamashita, Fumi Kato, Mutsumi Nishida, Megumi Satoh, and Ken-ichi Kawabata "Incident angle-dependent gain correction for reflection images on ultrasound computed tomography", Proc. SPIE 11319, Medical Imaging 2020: Ultrasonic Imaging and Tomography, 113190N (16 March 2020); https://doi.org/10.1117/12.2548555

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