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Proceedings Paper

Acoustic properties of healthy and reconstructed cleft lip
Author(s): Johan M. Thijssen; Nancy J. van Hees; Gert G. Weijers; Rinske W. Huyskens; Maartje Nillesen; Christos Katsaros; Chris L. de Korte
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Paper Abstract

The feasibility of echographic imaging of the tissues in healthy lip and in reconstructed cleft lip and estimating the dimensions and the normalized echo level of these tissues is investigated. Echographic images of the upper lip were made with commercial medical ultrasound equipment, using a linear array transducer (7-11 MHz bandwidth) and a non-contact gel coupling. Tissue dimensions were measured by means of software calipers. Echo levels were calibrated and corrected for beam characteristics, gel path and tissue attenuation by using a tissue-mimicking phantom. At central position of philtrum, mean thickness (and standard deviation) of lip loose connective tissue layer, orbicularis oris muscle and dense connective layer was 4.0 (sd 0.1) mm, 2.3 (sd 0.7) mm, 2.2 (sd 0.7) mm, respectively, in healthy lip at rest. Mean (sd) echo level of muscle and dense connective tissue layer with respect to echo level of lip loose connective tissue layer was in relaxed condition: - 19.3 (sd 0.6) dB and - 10.7 (sd 4.0) dB, respectively. Echo level of loose connective tissue layer was +25.6 (sd 4.2) dB relative to phantom echo level obtained in the focus of the transducer. Color mode echo images were calculated, after adaptive filtering of the images, which show the tissues in separate colors and highlight the details of healthy lip and reconstructed cleft lip. Quantitative assessment of thickness and echo level of various lip tissues is feasible after proper calibration of the echographic equipment. Diagnostic potentials of the developed quantitative echographic techniques for non-invasive evaluation of the outcome of cleft lip reconstruction are promising.

Paper Details

Date Published: 16 March 2006
PDF: 7 pages
Proc. SPIE 6147, Medical Imaging 2006: Ultrasonic Imaging and Signal Processing, 61470G (16 March 2006); doi: 10.1117/12.653608
Show Author Affiliations
Johan M. Thijssen, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Nancy J. van Hees, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Gert G. Weijers, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Rinske W. Huyskens, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Maartje Nillesen, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Christos Katsaros, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)
Chris L. de Korte, Radboud Univ. Nijmegen Medical Ctr. (Netherlands)


Published in SPIE Proceedings Vol. 6147:
Medical Imaging 2006: Ultrasonic Imaging and Signal Processing
Stanislav Emelianov; William F. Walker, Editor(s)

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