Contrast-enhanced ultrasound imaging using pulse inversion spectral deconvolution

Comparison of contrast-enhanced fundamental imaging, second-harmonic imaging, and pulse-inversion harmonic imaging.

RATIONALE AND OBJECTIVES To investigate the feasibility of recent contrast-specific ultrasound techniques in depicting vascular flow and the effects of changing the output power of the transducer and insonation mode on contrast enhancement, the authors performed an experimental study with a flow phantom. METHODS While changing the mechanical index and the sound insonation mode (continuous and...

Contrast-enhanced ultrasound for prostate cancer imaging

• Need for targeted instead of blind biopsies, in order to reduce false negatives and to improve grading and staging • Need for accurate grading, staging and prognosis, in order to a) reduce side effects by enabling active surveillance and treating only relevant cases and b) avoid recurrence as a result of understaging and inappropriate treatment • Need for targeted therapies (focal local treat...

Random Excitation by Optimized Pulse Inversion in Contrast Harmonic Imaging

Over the past twenty years, in ultrasound contrast imaging, new physiological information are obtained by the detection of non-linearities generated by the microbubbles. One of the most used techniques is the pulse inversion imaging. The usual command of this system is a fixed-frequency sinus wave. An optimal choice of this command requires the knowledge of the transducer and of the medium to o...

Pulse sequences for contrast-enhanced magnetic resonance imaging

Contrast-enhanced endoscopic ultrasound.

Compared to other imaging modalities, endoscopic ultrasound (EUS) has limitations in terms of image enhancement. However, with the availability of contrast agents in ultrasonography, EUS has evolved. Contrast-enhanced Doppler EUS (CD-EUS) enhances Doppler signals from vessels and is useful for characterizing lesions detected by EUS. Moreover, contrast-enhanced harmonic EUS (CH-EUS) with second-...