Tissue harmonic imaging sonography: evaluation of image quality compared with conventional sonography.

Shapiro, Robert; Wagreich, J; Parsons, Rosaleen B.; Stancato-Pasik, Agata; Yeh, Hsu‐Chong; Lao, Romera J

doi:10.2214/ajr.171.5.9798848

Cited by 251 publications

(150 citation statements)

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“…M any innovative technologies, such as harmonic imaging [1][2][3][4] and real-time compound imaging (SonoCT imaging), [5][6][7][8] have been introduced over the past several years to improve ultrasound (US) image quality. Real-time processing involving adaptive image analysis and enhancement (XRES imaging) is one of the latest commercially available US techniques.…”

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confidence: 99%

Application of Adaptive Image Processing Technique to Real-Time Spatial Compound Ultrasound Imaging Improves Image Quality

Meuwly¹,

Thiran²,

Gudinchet³

2003

Investigative Radiology

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Rationale and Objectives. To assess the impact of adaptive filter postprocessing on quality of ultrasound images. Methods. Ultrasound images acquired with real-time spatial compound imaging (SonoCT imaging) were subsequently processed with an adaptive real time algorithm (XRES imaging). Conventional and XRES-processed images from abdominal, pediatric or small parts ultrasound explorations were compared. The delineation of borders, tissue contrast, amount of noise, and overall image quality were evaluated. Results. Delineation of borders and tissue contrast were improved on all images (P Ͻ 0.05). The amount of noise was reduced (P Ͻ 0.05). The overall image quality was improved for abdominal, pediatric and small parts ultrasound explorations (P Ͻ 0.05). No image degradation was found. Conclusions. Adaptive processing provided better image quality without loss of clinically useful information.Key Words: diagnostic imaging, medical electronics, image enhancement, ultrasonography (Invest Radiol 2003;38: 257-262) M any innovative technologies, such as harmonic imaging 1-4 and real-time compound imaging (SonoCT imaging), [5][6][7][8] have been introduced over the past several years to improve ultrasound (US) image quality. Real-time processing involving adaptive image analysis and enhancement (XRES imaging) is one of the latest commercially available US techniques. It derives from processing of digital signals and is based on research originally performed for use in enhancing MRI images. With this technology, the US image, initially constructed by the scan converter of the device, is further refined in real time by an adaptive algorithm prior to display on the screen.XRES imaging is considered adaptive because it adapts its processing automatically to the nature of the target, both locally (ie, within an individual image) and temporally (over time from image to image). This adaptability is achieved in XRES by having both an analysis phase, in which both real tissue structures and ultrasound artifacts are identified, and an enhancement phase, in which structures identified in the analysis phase are enhanced and artifacts are suppressed. The analysis phase of XRES takes into account many characteristics of the image, such as textural and structural properties including gradients and local statistics. The results of this analysis directly control the enhancement phase; for example, smoothing is applied along an interface to improve continuity, whereas edge enhancement is applied in the perpendicular direction to improve spatial resolution. In regions identified by the analysis phase as being relatively homogeneous (containing minimal structure or texture), smoothing is applied equally in all directions to suppress speckle and noise. Thus XRES is designed both to suppress artifacts and to enhance interfaces and margins. In addition, XRES is a multiresolution algorithm. This means that all processinganalysis and enhancement-occurs at multiple scales within the image. Multiresolution processing improves robustness by all...

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mentioning

confidence: 99%

Application of Adaptive Image Processing Technique to Real-Time Spatial Compound Ultrasound Imaging Improves Image Quality

Meuwly¹,

Thiran²,

Gudinchet³

2003

Investigative Radiology

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“…With the use of filter techniques, the fundamental frequency is canceled out, allowing the second-harmonic portion to generate an image. [7][8][9][10][11] The use of these filtering techniques requires narrow harmonic bands, resulting in long ultrasonic pulses and leading to decreased spatial resolution. 12 A new technology, called phase inversion harmonic imaging, generates images by using 2 phase-inverted pulses sent one after the other.…”

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Detection of liver metastases: comparison of contrast‐enhanced wide‐band harmonic imaging with conventional ultrasonography.

Bernatik

Strobel²,

Hahn³

et al. 2001

J of Ultrasound Medicine

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Objective. To compare the detection rate of conventional ultrasonography and contrast-enhanced wide-band harmonic ultrasonographic imaging in the detection of small liver metastases. Methods. Consecutive patients with histologically proved gastrointestinal carcinoma liver metastases were studied. Biphasic helical computed tomography, conventional ultrasonography, and contrast-enhanced wide-band harmonic imaging were performed on all patients within a 5-day period. The biphasic helical computed tomographic scans were reviewed and interpreted by a skilled radiologist. The number of lesions and their descriptive characteristics were recorded for analysis. In addition, videotape recordings of the conventional ultrasonography and contrast-enhanced wide-band harmonic imaging were blindly reviewed, after which the number of detected lesions and their characteristics were then compared with those detected on biphasic helical computed tomography, considered the standard of reference. Results. Twenty-eight patients (10 female and 18 male; age range, 45-72 years) were studied. Conventional ultrasonography detected 37 (59%) of all lesions visualized by biphasic helical computed tomography. The detection rate for contrast-enhanced wide-band harmonic imaging was significantly higher (61 [97%] of 63). In our series, two 10-mm lesions near the diaphragm were not visualized by wide-band harmonic imaging. Conclusions. The use of contrast-enhanced imaging techniques significantly improves the ultrasonographic detection of liver metastases. Our results achieved the sensitivity of biphasic helical computed tomography.

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“…Tissue harmonic imaging (THI) is relatively new technique against conventional sonography and it potentially provides better image quality [15]. Now, THI is widely used and the studies conducted on various organs such as breast [16,17], thyroid gland [7], liver [8], gallbladder [6], carotid arteries [7], bile duct [18].…”

Section: Discussionmentioning

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Tissue harmonic imaging in comparison with conventional sonography: Effect on image quality of the nuchal translucency measurement

Ceylan¹,

Er²

2014

CMJ

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Aim. In this study, tissue harmonic imaging (THI) was compared with conventional gray scale ultrasonography (CUS) by scoring system in measurement of nuchal translucency (NT) and in examination of fetal posterior neck region. Additionally, it was also investigated that whether body habitus of patient provide effect on this condition or not. Methods. Fetal neck region and nuchal translucency were evaluated by using scoring system (1: not seen, 2: seen uncertainly, 3: seen acceptably, 4: well seen, and 5: very well seen). The tissue harmonic imaging was compared with B-mode. Results. In normal patients, overall average score (11+0 to 13+6 weeks) for CUS was 3.27 and it was 3.69 for THI. However, in obese patients, overall average score for CUS was 2.96 and it was 3.48 for THI. For the group with normal BMI; examination with tissue harmonic imaging was on average more clearly visible in 44.6% of the cases, the same as in the conventional B-mode in 53%, and worse in only 2.4%. However, in obese group; examination with tissue harmonic imaging was on average more clearly visible in 51.2% of the cases, the same as in the conventional B-mode in 46.4%, and worse in only 2.4%. Conclusion. When normal group and obese groups are completely considered, it was found that THI provides similar or better image quality almost in all of the patients than that of CUS. Keywords:Harmonic imaging, scoring system, ultrasonography, body mass index Özet Amaç. Bu çalışmada, fetus boyun posterior bölgesinin değerlendirilmesinde ense kalınlığı ölçümü doku harmonik görüntüleme (DHG) ve konvansiyonel gri skala ultrasonografide (KUS) skorlama sistemi ile karşılaştırılmıştır. Ayrıca hastaların vücut habitusunun ölçümlere etkisinin olup olmadığı araştırılmıştır. Yöntem. Fetal boyun bölgesi ve ense kalınlığı skorlama sistemi kullanılarak değerlendirildi (1: görülemeyen, 2: belirsiz görülen, 3: kabul edilebilir ölçüde görülen, 4: iyi görülen, 5: çok iyi görülen). Doku harmonik görüntüleme B mod ultrasonografi ile karşılaştırıldı. Bulgular. Normal hastalarda, genel ortalama puan (11+0 ile 13+6 hafta) KUS'de 3,27 ve DHG ile 3,69 idi. Ancak, obez hastalarda genel ortalama puan KUS' de 2,96 ve DHG ile 3,48 idi. Normal vücut kitle indeksi olan grupta; DHG ile değerlendirmede ortalama olarak çok net görülebilen grup hastaların %44,6'sı, KUS ile hastaların %53'üdür. Sadece %2,4 görüntü kötü sınıfında idi. Ancak obez grupta; DHG ile ortalama olarak çok net görülebilen grup hastaların % 51,2' si, KUS ile hastaların %46,4' ü dür. Sadece %2,4 görüntü kötü sınıfında idi. Sonuç. Normal grup ve obez grup tümüyle ele alındığında; tüm hastalarda DHG, KUS ile benzer yada daha iyi görüntü kalitesi sağlamaktadır.Anahtar sözcükler: Harmonik görüntüleme, skorlama sistemi, ultrasonografi, vücut kitle indeksi Geliş tarihi

show abstract

Tissue harmonic imaging sonography: evaluation of image quality compared with conventional sonography.

Cited by 251 publications

References 2 publications

Application of Adaptive Image Processing Technique to Real-Time Spatial Compound Ultrasound Imaging Improves Image Quality

Application of Adaptive Image Processing Technique to Real-Time Spatial Compound Ultrasound Imaging Improves Image Quality

Detection of liver metastases: comparison of contrast‐enhanced wide‐band harmonic imaging with conventional ultrasonography.

Tissue harmonic imaging in comparison with conventional sonography: Effect on image quality of the nuchal translucency measurement

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