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Canadian Acou/Tic ISSN 0711-6659 Canadian acou/tic/ acou/tiaue canadienne Journal of the Canadian Acoustical Association - Journal de l’Association Canadienne d’Acoustique JUNE 2007 JUIN 2007 Volume 35 -- Number 2 Volume 35 -- Numéro 2 EDITORIAL / EDITORIAL 1 Technical A rticles and Notes / A rticles et Notes Techniques Medical Diagnostic Ultrasound E. Carr Everbach 3 Frequency-Based Signal Processing For Ultrasound Color Flow Imaging Alfred C.H. Yu, K. Wayne Johnston, and Richard S.C. Cobbold 11 Recent Flow Analysis studies in Vascular Models Using Doppler Ultrasound Tamie L. Poepping, Meghan L. Thorne, Emily Y. Wong, Richard N. Rankin, and David W. Holdsworth 25 Coded Excitation Methods for Ultrasound Harmonic Imaging Roozbeh Arshadi, Alfred C.H. Yu, and Richard S.C. Cobbold 35 Parametric Analysis of Ultrasound Backscatter signals for Monitoring cancer cell structural changes during cancer Treatment Harshita Nallapareddy, Sridhar Krishnan and Michael Kolios 47 Ultrasound Micro-Elastography: A New Imaging Modality To Phenotype Hypertension In Rat Models Roch L. Maurice, Jérémie Fromageau, François Yua, Ékatherina Stoyanova, Zhao Qin, Junzheng Peng, Pavel Hamet, Johanne Tremblay and Guy Cloutier 55 Lumbar Mechanics From Ultrasound Imaging Geoffrey Desmoulin and Theodore Milner 61 Applications Of Therapeutic Ultrasound In Dentistry And In The Craniofacial Area: Present And Future Tarek El-Bialy 69 Book Reviews / Revue des publications 74 News / Informations 76 Minutes of CAA Directors’ meeting / Compte rendu de la réunion des directeurs de l’ACA 82 CAA Prizes Announcement / Annonce de Prix 86 Canadian News - Acoustics Week in Canada 2007 / Semaine Canadienne d’acoustique 2007 88 canodfon acoustique acou/tic/ canadienne THE CANADIAN ACOUSTICAL ASSOCIATION L’ASSOCIATION CANADIENNE D’ACOUSTIQUE P.O. BOX 1351, STATION “F” C.P. 1351, SUCCURSALE “F” TORONTO, ONTARIO M4Y 2V9 TORONTO, ONTARIO M4Y 2V9 CANADIAN ACOUSTICS publishes refereed articles and ACOUSTIQUE CANADIENNE publie des articles arbitrés et news items on all aspects of acoustics and vibration. Articles des informations sur tous les domaines de l’acoustique et des reporting new research or applications, as well as review or vibrations. On invite les auteurs à soumettre des manuscrits, tutorial papers and shorter technical notes are welcomed, in rédigés en français ou en anglais, concernant des travaux in­ English or in French. Submissions should be sent directly to édits, des états de question ou des notes techniques. Les the Editor-in-Chief. Complete instructions to authors concern­ soumissions doivent être envoyées au rédacteur en chef. Les ing the required camera-ready copy are presented at the end instructions pour la présentation des textes sont exposées à of this issue. la fin de cette publication. CANADIAN ACOUSTICS is published four times a year - in March, ACOUSTIQUE CANADIENNE est publiée quatre fois par année - en June, September and December. The deadline for submission of ma­ mars, juin, septembre et décembre. La date de tombée pour la sou­ terial is the first day of the month preceeding the issue month. Copy­ mission de matériel est fixée au premier jour du mois précédant la right on articles is held by the author(s), who should be contacted publication d’un numéro donné. Les droits d’auteur d’un article ap­ regarding reproduction. Annual subscription: $20 (student); $60 (in­ partiennent à (aux) auteur(s). Toute demande de reproduction doit dividual, institution); $300 (sustaining - see back cover). Back issues leur être acheminée. Abonnement annuel: $20 (étudiant); $60 (indi­ (when available) may be obtained from the CAA Secretary - price $10 viduel, société); $300 (soutien - voir la couverture arrière). D’anciens including postage. Advertisement prices: $600 (centre spread); $300 numéros (non-épuisés) peuvent être obtenus du Secrétaire de l’ACA (full page); $175 (half page); $125 (quarter page). Contact the Associ­ - prix: $10 (affranchissement inclus). Prix d’annonces publicitaires: ate Editor (advertising) to place advertisements. Canadian Publica­ $600 (page double); $300 (page pleine); $175 (demi page); $125 (quart de page). Contacter le rédacteur associé (publicité) afin de tion Mail Product Sales Agreement No. 0557188. placer des annonces. Société canadienne des postes - Envois de publications canadiennes - Numéro de convention 0557188. EDITOR-IN-CHIEF / RÉDACTEUR EN CHEF EDITOR / RÉDACTEUR Ramani Ramakrishnan Chantai Laroche Department of Architectural Science Programme d’audiologie et d’orthophonie Ryerson University École des sciences de la réadaptation 350 Victoria Street Université d’Ottawa Toronto, Ontario M5B 2K3 451, chemin Smyth, pièce 3062 Tel: (416) 979-5000; Ext: 6508 Ottawa, Ontario K1H 8M5 Fax: (416) 979-5353 Tél: (613) 562-5800 # 3066; Fax: (613) 562-5428 E-mail: [email protected] E-mail: [email protected] A s s o c ia t e E d it< / REDACTEURS ASSOCIES Advertising / Publicité News / Informations Jason Tsang Steven Bilawchuk RWDI AIR Inc. aci Acoustical Consultants Inc. 650 Woodlawn Road Suite 107, 9920-63rd Avenue Guelph, Ontario N1K 1B8 Edmonton, Alberta T6E 0G9 Tel: (519) 823-1311, #2277 Tel: (780) 414-6373 Fax: (519) 823-1316 Fax: (780) 414-6376 E-mail: [email protected] E-mail: [email protected] GUEST EDITORIAL / ÉDITORIAL INVITÉ In this special issue of Canadian Acoustics, we are focusing Dans cette édition spéciale de l’Acoustique Canadienne, on the higher end of the acoustic spectrum; ultrasound in the nous nous concentrons sur les fréquences les plus élevées megahertz range. More specifically, contributions to this is­ du spectre acoustique; les ultrasons dans la gamme méga­ sue centre on the biomedical applications of ultrasound. Just hertz. Plus spécifiquement, les contributions à cette publica­ like the frequencies in question are varied, so is the range tion sont dédiées principalement aux applications biomédi­ of applications. In this issue you will find original research cales des ultrasons. Justement, comme les fréquences en articles and review articles spanning such disparate topics as question seront variées, l’envergure des applications le sera acoustic elastography to Doppler flow imaging. Even so, this aussi. Dans ce numéro vous trouverez des articles originaux issue presents only a coarse sampling of the full “bandwidth” de recherches et des comptes-rendus parcourant l’ampleur of biomedical ultrasound research and development in Can­ des matières différentes telles que l’elastographie acous­ ada. For instance, nationally, we have two manufacturers of tique et l’imagerie d’écoulement Doppler. Néanmoins, ce biomedical ultrasound devices; each pushing the envelope in numéro présente seulement un « sous-échantillonage » de their respective niches. Canada has also been the home of la recherche et du développement des ultrasons biomédicaux several key advances in ultrasound; the development of very au Canada. Par exemple, nous avons au Canada deux fabri­ high-frequency (above 30 MHz) transducers and devices for cants de dispositifs d’ultrasons biomédicaux; chacun pous­ use in ultrasound biomicroscopy, the invention of 3D ultra­ sant la croissance du développement de dans leurs domaines sound imaging, and the first measurements of acoustic scat­ de spécialisation. Le Canada a également été à l’avant garde tering from single biological cells - to name just three. de plusieurs progrès majeurs dans le domaine des ultrasons; le développement de transducteurs et d’instruments à très We begin the issue with a reprint of a recent review article hautes fréquences (au-delà de 30 MHz) pour l’usage dans that gives a thorough background on many aspects of bio­ la biomicroscopie ultrasonore, l’invention de la formation medical ultrasound. You can then read more about the use of d’images ultrasonores 3D et les premières mesures de la ultrasound for measuring blood flow in two different papers. diffusion acoustique de cellules biologiques individuelles Next are two articles about signal processing techniques; the - pour seulement en nommer trois. first, a piece of work focused on raising the signal-to-noise ra­ tio through coded excitation, the other, a work concerning the Nous débutons ce numéro avec une réimpression d’un ar­ development of filters to attempt to classify between living ticle de revue qui offre les éléments de base de plusieurs as­ and dying tissues. In the following research article, the au­ pects des ultrasons biomédicaux. Vous pourrez ensuite lire thors present results of their use of ultrasound to characterise deux articles au sujet de l’utilisation des ultrasons dans les the mechanical properties of arteries and kidneys. The pen­ mesures d’écoulement du sang. Les deux articles qui suivent ultimate paper shows that ultrasound imaging can be used to présentent des techniques de traitement de signaux; dans le measure the precise movement of muscles. Finally, we learn premier, une étude dédiée à l’augmentation du rapport sig­ in the last article that ultrasound is being used therapeutically nal/bruit par l’excitation codée et, dans le second, un travail in dentistry. It’s clear from the contents of this special issue au sujet du développement de filtres pour tenter de différen­ that ultrasound has come a long way from the fuzzy obstetric cier entre les tissus vivants et morts. Dans l’article de re­ scans that we are all familiar with! cherche suivant, les auteurs présentent des résultats de leur usage des ultrasons pour caractériser les propriétés méca- WHAT’S NEW ?? QUOI DE NEUF ? Promotions Retirements Promotions
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