Scanning and Imaging Using Lamb Waves

Lassal, Ali C.; Payne, P.A.

doi:10.1007/978-1-4419-8588-0_57

Cited by 8 publications

(8 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…46 There, the Court firstly referred to the goal of social cohesion contained in recital 17. 47 The EU legislature made the acquisition of the right of permanent residence … subject to the integration of the citizen of the Union in the host Member State … [I]t would be incompatible with [that] integrationbased reasoning … to consider that the required degree of integration in the host Member State depended on whether the continuous period of five years' residence ended before or after 30 April 2006.48 This passage can be said to be in line with the progressive history of EU free movement law, as the Court's aim was to widen the reach of the right of permanent residence by enabling reliance upon older periods of residence. In order to justify that outcome, however, it treated the right of permanent residence as conditional upon integration ('subject to').…”

Section: Pre-directive Periodsmentioning

confidence: 99%

Selective Citizenship: How the Court of Justice Linked Security of Residence to Integration

Ryan

2019

Eur. J. Migr. Law

View full text Add to dashboard Cite

This article examines the case-law of the Court of Justice concerning security of residence for EU citizens and family members under Directive 2004/38. The relevant provisions of the Directive confer a right of permanent residence, and enhanced protection against expulsion, upon longer-term residents. It is argued that, in interpreting these provisions from 2006 onwards, the Court of Justice adopted a discourse which conceived of the rights as dependent on an individual’s social integration. The initial effect of the Court’s ‘turn’ to integration was benign, as it supported the retrospective extension of permanent residence, and ensured the efficacy of enhanced protection against expulsion. Later, however, the Court would treat integration as a precondition, in ways which would limit the rights of long-term residents who were not economically active or self-sufficient, or who had been sentenced to periods of imprisonment. That Court’s integration discourse was presumably influenced by developments in policy concerning third-country nationals at the state level which had linked immigration status to integration tests. The result was a selective approach to security of residence, which tended to deny protection to persons whose presence was unlikely to be favoured by Member States.

show abstract

Section: Pre-directive Periodsmentioning

confidence: 99%

Selective Citizenship: How the Court of Justice Linked Security of Residence to Integration

Ryan

2019

Eur. J. Migr. Law

View full text Add to dashboard Cite

show abstract

“…While these efforts proved the feasibility of ultrasonic imaging in dentistry, this version of the technique could not detect periodontal attachment loss, and failed to gain clinical acceptance. Recently, researchers have begun exploring new uses of ultrasound in dentistry [36,37,38,39] and studies have been conducted using ultrasound to image the periodontal pocket space by aiming the transducer apically into the pocket from the gingival margin [40,41,42,43,44,45,46]. The major technical barrier to this approach is providing an efficient coupling medium for the ultrasonic wave into the thin (0.25-0.5 mm) periodontal pocket.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Periodontal Probing Based on the Dynamic Wavelet Fingerprint

Hou

Rose²,

Hinders

2005

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

Manual pocket depth probing has been widely used as a retrospective diagnosis method in periodontics. However, numerous studies have questioned its ability to accurately measure the anatomic pocket depth. In this paper, an ultrasonic periodontal probing method is described, which involves using a hollow water-filled probe to focus a narrow beam of ultrasound energy into and out of the periodontal pocket, followed by automatic processing of pulse-echo signals to obtain the periodontal pocket depth. The signal processing algorithm consists of three steps: peak detection/characterization, peak classification, and peak identification. A dynamic wavelet fingerprint (DWFP) technique is first applied to detect suspected scatterers in the A-scan signal and generate a two-dimensional black and white pattern to characterize the local transient signal corresponding to each scatterer. These DWFP patterns are then classified by a two-dimensional FFT procedure and mapped to an inclination index curve. The location of the pocket bottom was identified as the third broad peak in the inclination index curve. The algorithm is tested on full-mouth probing data from two sequential visits of 14 patients. Its performance is evaluated by comparing ultrasonic probing results with that of full-mouth manual probing at the same sites, which is taken as the "gold standard."

show abstract

“…Instead, they could only detect echoes off the aveolar bone, and they never gained clinical acceptance. More recently, alternative research has been conducted on the use of ultrasound to image the periodontal pocket space by aiming the transducer apically into the pocket from the gingival margin [68][69][70][71][72]. The major technical barrier to this approach is providing an efficient coupling medium for the ultrasonic wave into the thin (0.25-0.5 mm) periodontal pocket.…”

Section: Introductionmentioning

confidence: 99%

“…The major technical barrier to this approach is providing an efficient coupling medium for the ultrasonic wave into the thin (0.25-0.5 mm) periodontal pocket. The method of Loker and Hagenbuch [68] uses a metal delay line placed on the crest of the gingival tissue, so that the ultrasound wave travels through the gingiva. As a result, this technique measures echoes off the aveolar bone rather than the periodontal ligament, since the bone is the only hard tissue coupled to the gingiva.…”

Section: Introductionmentioning

confidence: 99%