Real-time Compound imaging: Verbesserte Erkennbarkeit von Punktionsnadeln und Markierungsdrähten gegenüber Single-line- Ultraschall?

Saleh, Andreas; Ernst, S.; Grust, A.; Fürst, G.; Dall, Philippa M.; Mödder, Ulrich

doi:10.1055/s-2001-12467

Cited by 20 publications

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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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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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“…Die bereits zur transrektalen sonographischen Untersuchung der Prostata empfohlene Technik nach dem Prinzip des Echtzeit-Compounding [3,4] kann auch auf andere Einsatzmöglichkeiten in der Urosonographie ausgedehnt werden. Beim Sono-CT wird durch Variation des Einschallwinkels die zu untersuchende Region praktisch durch verschiedene Einschallrichtungen sonographisch erfasst und zu in einem Bild zusammengeführt.…”

Section: Echtzeit-spatial-compoundtechnikunclassified

Neue Techniken der Urosonographie

et al. 2004

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New sonographic techniques in urology, together with their principles of operation, will be presented. Together with the utilization of broadband ultrasound scanners and digital beam formers, leading to better spatial resolution and increased line density in ultrasound imaging, panorama sonography enables the outline of wide lateral regions independent of the width of the scanner. Spatial compound sonography achieves a comparatively better visualization of details in the b-mode image than has yet been available. The continuously improved 3-D, now leading to 4-D, techniques, which means real time capabilities, make the visualization of unrestricted imaging planes, which are not seen in conventional 2-D techniques, possible. The second harmonic imaging technique, including the special applications tissue harmonic imaging (THI) and contrast harmonic imaging (CHI), uses special ultrasound signal processing procedures for capturing and evaluating tissue hemoperfusion-here in combination with ultrasound contrast agents (UCA). Furthermore, microvascular imaging (MVI) enables the visualization of perfusion in tissues reaching the microcirculation regions. This leads to new possibilities for the assessment of pathological perfusion patterns, e.g. in andrology (perfusion of testicles) and uro-oncology (hyperperfusion of malignant regions).

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“…Vorraussetzung für die exakte Führung der Nadel während der Markierung ist aber nicht nur die genaue Lokalisation des Herdes, sondern auch die Erkennbarkeit der ganzen Nadel bis zur Spitze, gerade dann, wenn kein spezieller Punktionsschallkopf verwendet wird. In-vitro-Untersuchungen weisen darauf hin, dass sowohl die Kanülendicke, die Materialbeschaffenheit, als auch der Winkel, unter dem die Punktion erfolgt, einen deutlichen Einfluss auf den Bildkontrast und die Erkennbarkeit der Markierungen haben [15].…”

Section: Diskussionunclassified

“…Gegenüber dem konventionellen B-Bild im Single-Line-Verfahren ergeben sich insbesondere bei steileren Winkelpositionen Vorteile für ein Real-Time-Compoundverfahren, wobei aus verschiedenen "Sichtwinkeln" gewonnene Bilder in Echtzeit zu einem Bild zusammengesetzt werden können [15]. Ein Summationsbild aus bis zu 9 Einzelaufnahmen aus verschiedenen Winkelpositionen ist aber derzeit im Gegensatz zum Tissue Harmonic Imaging (THI) bei der Mehrzahl der leistungsfähigen Ultraschallgeräte noch nicht verfügbar.…”

Section: Diskussionunclassified

Tissue Harmonic Imaging (THI) zur prÃ¤operativen sonographischen Markierung von Mammaherden

Jung¹,

Clevert²,

Lutz³

et al. 2002

Rofo Fortschr Geb Rontgenstr Neuen Bildgeb Verfahr

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Real-time Compound imaging: Verbesserte Erkennbarkeit von Punktionsnadeln und Markierungsdrähten gegenüber Single-line- Ultraschall?

Abstract: At 0 degree and 12 degrees visibility is very good for all tested materials. For steeper angulations contrast was partly critical in SLU and significantly enhanced with compound imaging. Thus, SonoCT may be useful to increase precision of ultrasound-guided percutaneous interventions.

Cited by 20 publications

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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

Neue Techniken der Urosonographie

Tissue Harmonic Imaging (THI) zur prÃ¤operativen sonographischen Markierung von Mammaherden

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