JP7278267B2 - 音響減衰係数を測定するための超音波システム及び方法 - Google Patents
音響減衰係数を測定するための超音波システム及び方法 Download PDFInfo
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- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
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Description
本願は、2017年9月19日に出願された米国仮出願番号第62/560,248号の利益及びそれに対する優先権を主張し、同出願は参照により本明細書に組み込まれる。
[019]
[020] ここで、αobjは撮像された物体の減衰係数であり、αrefは基準ファントムの減衰係数であり、Aは定数である。この場合は、αobjを次のように推定することができる。
[021]
[025]
[028]
[031]
Claims (15)
- 組織の減衰係数を求める方法であって、前記方法は、
パルスシーケンスに従って超音波トランスデューサから組織に向けて超音波パルスを送信するステップであって、前記パルスシーケンスは、前記超音波トランスデューサの主通過帯域の内側にある少なくとも1つの第1の周波数及び前記主通過帯域の外側にある少なくとも1つの第2の周波数のパルスを含む、ステップと、
前記パルスシーケンスの前記少なくとも1つの第1の周波数及び前記少なくとも1つの第2の周波数の前記パルスに対応するエコー信号を受信するステップと、
前記少なくとも1つの第1の周波数及び前記少なくとも1つの第2の周波数の前記パルスに対応する受信エコー信号の組み合わせに少なくとも部分的に基づいて、前記組織の減衰係数を求めるステップと、
計算された前記減衰係数と同時に、超音波画像を表示するステップと、
を有し、
前記主通過帯域は、前記超音波トランスデューサの-3dB内の通過帯域又は-6dB内の通過帯域である、方法。 - 前記超音波画像が、前記パルスシーケンスから受信されたエコーから、又は少なくとも1つの他のパルスシーケンスから受信されたエコーから生成される、請求項1に記載の方法。
- 少なくとも1つの第1の周波数の前記パルスが広帯域パルスを含み、少なくとも1つの第2の周波数の前記パルスが少なくとも1つの狭帯域パルスを含む、請求項1又は2に記載の方法。
- 前記広帯域パルスの中心周波数が、前記超音波トランスデューサの前記主通過帯域内にある、請求項3に記載の方法。
- 前記少なくとも1つの狭帯域パルスの中心周波数が、前記超音波トランスデューサの前記主通過帯域の外側にある、請求項3又は4に記載の方法。
- 前記少なくとも1つの狭帯域パルスが、それぞれ異なる中心周波数を有する複数の狭帯域パルスの組み合わせである、請求項3又は4に記載の方法。
- それぞれ異なる中心周波数を有する前記複数の狭帯域パルスの位相が、互いに対してシフトされている、請求項6に記載の方法。
- 前記広帯域パルスの継続時間が、前記少なくとも1つの狭帯域パルスの継続時間未満である、請求項3から7のいずれか一項に記載の方法。
- 前記パルスシーケンスが符号化励起を含む、請求項1から8のいずれか一項に記載の方法。
- 前記減衰係数を求めるステップがスペクトルシフト法を含む、請求項1から9のいずれか一項に記載の方法。
- 組織に向けて超音波パルスを送信する超音波トランスデューサであって、前記超音波パルスはパルスシーケンスに従って送信され、前記パルスシーケンスは、前記超音波トランスデューサの主通過帯域の内側にある少なくとも1つの第1の周波数及び前記主通過帯域の外側にある少なくとも1つの第2の周波数のパルスを含む、超音波トランスデューサと、
前記少なくとも1つの第1の周波数及び前記少なくとも1つの第2の周波数の前記パルスに対応するエコー信号に少なくとも部分的に基づいて、前記組織の減衰係数を計算する減衰係数計算器と、
前記エコー信号に基づいて超音波撮像データを生成する少なくとも1つのプロセッサと、
を備え、
前記主通過帯域は、前記超音波トランスデューサの-3dB内の通過帯域又は-6dB内の通過帯域である、超音波撮像システム。 - 前記減衰係数計算器がさらに、前記組織の減衰係数に少なくとも部分的に基づいて組織の特徴付けを計算する、請求項11に記載の超音波撮像システム。
- 前記パルスシーケンスに対応するコマンドを生成し、前記コマンドを送信して、前記超音波トランスデューサから前記パルスシーケンスを送信させるパルスシーケンス生成器をさらに備える、請求項11又は12に記載の超音波撮像システム。
- 前記パルスシーケンス生成器がさらに、符号化励起を生成する、請求項13に記載の超音波撮像システム。
- 前記減衰係数計算器がさらに、前記符号化励起から生じるエコー信号を復号する、請求項14に記載の超音波撮像システム。
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PCT/EP2018/073962 WO2019057503A1 (en) | 2017-09-19 | 2018-09-06 | ULTRASONIC SYSTEMS AND METHODS FOR MEASURING ACOUSTICAL ATTENUATION COEFFICIENTS |
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US12016730B2 (en) * | 2019-01-24 | 2024-06-25 | Koninklijke Philips N.V. | Ultrasonic imaging of acoustic attenuation coefficients with confidence estimation |
US11850099B2 (en) * | 2019-02-26 | 2023-12-26 | Canon Medical Systems Corporation | Ultrasonic diagnostic apparatus |
CN111464979A (zh) * | 2019-10-30 | 2020-07-28 | 孙凯旋 | 基于车联网的电驱动车控制方法、云端服务器及存储介质 |
CN111466951B (zh) * | 2020-04-15 | 2023-04-07 | 深圳开立生物医疗科技股份有限公司 | 超声衰减图像的生成方法、装置、超声设备及存储介质 |
CN114487100B (zh) * | 2021-12-30 | 2024-01-26 | 中国特种设备检测研究院 | 一种超声探头频谱测试的频谱偏移补偿方法 |
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- 2018-09-06 US US16/648,010 patent/US11726195B2/en active Active
- 2018-09-06 EP EP18765632.7A patent/EP3685184A1/en active Pending
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