Ultrasound Evaluation of Normal and Abnormal Fetuses: Comparison of Conventional, Tissue Harmonic, and Pulse-Inversion Harmonic Imaging Techniques

Ryu, Jeong Ah; Kim, Bohyun; Kim, Sooah; Yang, Soon Ha; Choi, Moon Hae; Ahn, Hyeong Sik

doi:10.3348/kjr.2003.4.3.184

Cited by 4 publications

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(From Fig. 10 of reference [4]: computation by Dr Mark Cahill) demonstrated the diagnostic value of tissue harmonic imaging in obstetrics [74], in general abdominal and pelvic imaging [75], in hepatic [76], pancreatic [77], renal [78], and breast imaging [79,80], in cardiology [81,82] and in musculoskeletal studies [83]. The most obvious advantages arise when examining otherwise difficult-to-image patients.…”

Section: Tissue Harmonic Imagingmentioning

confidence: 99%

Tissue non-linearity

Duck

2009

Proc Inst Mech Eng H

View full text Add to dashboard Cite

The propagation of acoustic waves is a fundamentally non-linear process, and only waves with infinitesimally small amplitudes may be described by linear expressions. In practice, all ultrasound propagation is associated with a progressive distortion in the acoustic waveform and the generation of frequency harmonics. At the frequencies and amplitudes used for medical diagnostic scanning, the waveform distortion can result in the formation of acoustic shocks, excess deposition of energy, and acoustic saturation. These effects occur most strongly when ultrasound propagates within liquids with comparatively low acoustic attenuation, such as water, amniotic fluid, or urine. Attenuation by soft tissues limits but does not extinguish these non-linear effects. Harmonics may be used to create tissue harmonic images. These offer improvements over conventional B-mode images in spatial resolution and, more significantly, in the suppression of acoustic clutter and side-lobe artefacts. The quantity B/A has promise as a parameter for tissue characterization, but methods for imaging B/A have shown only limited success. Standard methods for the prediction of tissue in-situ exposure from acoustic measurements in water, whether for regulatory purposes, for safety assessment, or for planning therapeutic regimes, may be in error because of unaccounted non-linear losses. Biological effects mechanisms are altered by finite-amplitude effects.

show abstract

Section: Tissue Harmonic Imagingmentioning

confidence: 99%

Tissue non-linearity

Duck

2009

Proc Inst Mech Eng H

View full text Add to dashboard Cite

show abstract

Harmonic versus conventional ultrasound imaging of the urinary tract in children

Bartram

Darge

2005

Pediatr Radiol

View full text Add to dashboard Cite

show abstract

Ultrasonography of the pancreas. 2. Harmonic imaging

et al. 2006

View full text Add to dashboard Cite

Tissue harmonic imaging (THI) is a relatively new ultrasonographic imaging modality which has been implemented in many modern scanners. As several previous studies have pointed out, THI can help to overcome some shortcomings of conventional B-mode ultrasonography (US). The aim of this article is to give a compact summary of the potentials of THI, focused on pancreatic imaging. Beginning with a recapitulation of the technical background of THI, the particularities and suitable applications of THI in US of the pancreas are discussed. Examination protocols and typical indications are presented together with example images. Finally, new trends and developments in B-mode sonography of the pancreas such as panorama US, compound imaging, and photopic US are mentioned.

show abstract

Ultrasound Evaluation of Normal and Abnormal Fetuses: Comparison of Conventional, Tissue Harmonic, and Pulse-Inversion Harmonic Imaging Techniques

Cited by 4 publications

References 24 publications

Tissue non-linearity

Tissue non-linearity

Harmonic versus conventional ultrasound imaging of the urinary tract in children

Ultrasonography of the pancreas. 2. Harmonic imaging

Contact Info

Product

Resources

About