Automatic Optimization of Chirp Setting Parameters in Medical Ultrasound Contrast Imaging

نویسندگان

  • Amira Zaylaa
  • Sébastien Ménigot
  • Jamal Charara
  • Jean-Marc Girault
چکیده

Medical ultrasound contrast imaging is a powerful modality undergoing successive developments in the last decade to date. Lately, pulse inversion has been used in both ultrasound tissue harmonic and contrast imaging. However, there was a tradeoff between resolution and penetration. Chirp excitations partially solved the tradeoff, but the chirp setting parameters were not optimized. The present work proposes for the first time combining chirp inversion with ultrasound contrast imaging, with the motivation to improve the contrast, by automatically optimizing the setting parameters of chirp excitation, it is thus an optimal command problem. Linear chirps, 5 μm diameter microbubbles and gradient ascent algorithm were simulated to optimize the chirp setting parameters. Simulations exhibited a gain of 5 dB by automatic optimization of chirp inversion relative to pulse inversion. The automatic optimization process was quite fast. Combining chirp inversion with ultrasound contrast imaging led to a maximum backscattered power permitting high contrast outcomes and optimum parameters.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Empirical Optimization Of Frequency Parameters In Chirp Inversion Imaging

Contrast ultrasound imaging has become a significant imaging technique for the last ten years. Physiological and pathological information are accessible thanks to microbubble injection and nonlinearity detection. To improve resolution and penetration, frequency modulated signals called chirps combined with compression filter have been utilized by radar technology. Recent studies applied the use...

متن کامل

Empirical Research On The Optimization Of The Frequency Parameters Of « Chirp » Sequences Used In Contrast Ultrasound Imaging

The contrast medical imaging is an active research domain in which several coding techniques of the transmit have been proposed to increase the contrast. In this paper, we focus on the continuous coding of the Ultrasound transmits, such as “chirp” sequences, and their insonation on the medium under exploration. We empirically show that there are particular values for the frequency parameters of...

متن کامل

Investigation of acoustic properties of silica coated gold nanoparticle as contrast agent for Ultrasonography

Interoduction: Ultrasound images have often low contrast due to small differences in acoustic impedance between different tissues. Air or gas microbubbles that surrounded by membrane are most of the contrast agents in ultrasound imaging. Problems such as instability in sound pressure and inability in penetrating from the blood vessel into body tissues limited the use of microbubbles into the in...

متن کامل

Computerize classification of Benign and malignant thyroid nodules by ultrasound imaging

Introduction: Early detection and treatment of thyroid nodules increase the cure rate and provide optimal treatment. Ultrasound is the chosen imaging technique for assessment of thyroid nodules. Confirmation of the diagnosis usually demands repeated fine needle aspiration biopsy (FNAB). So, current management, has morbidity and non zero mortality. The goal of the present study ...

متن کامل

A new approach for automatic motion compensation for improved estimation of perfusion quantification parameters in ultrasound imaging

This work presents a new approach for automatic motion compensation in the context of ultrasound contrast imaging. Image registration is obtained by performing a rigid transformation on the basis of a similarity criterion between a reference image and the images to be realigned. Mutual information was found to be the most suitable and robust similarity criterion in the presence of changes in co...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2013