Question

QUS - Bone densitometry

Does anyone have some experience with this technique? I have some questions about it.
Apr 10, 2012

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All Answers (18)

  • Michael Dimuzio · The North Shore Osteoporosis Center
    Yes..What's your question?
    Michael Dimuzio
    Apr 10, 2012
  • Laura Evangelista · Istituto Oncologico Veneto
    I have just some experiences about this technique!
    Please send me the question and I will truy to provide you a clear aswer!
    Laura
    Apr 10, 2012
  • Jane Raleigh · Castle Hill Hospital
    Yes, I have experience of this technique. What's the question? Jane
    Apr 10, 2012
  • Vincent Boutier
    Can you please tell me what is your question?
    Apr 10, 2012
  • Sebastian Darr · Medizinische Hochschule Hannover
    @Rafael: could you state your questions in here so that we can all work on them?
    Best, Sebastian
    Apr 10, 2012
  • Rafael Medeiros · Universidade Estadual Paulista
    In QUS, which is the unit measure? As in the DXA, the unit is g/cm2.
    I never used the technique. I'm just a beginner curious.
    Apr 10, 2012
  • Wojciech Glinkowski · Medical University of Warsaw
    Dear Colleague,
    I have some experience with QUS (Achilles, Achilles Plus, Achilles Express, Achilless Express II, Sahara, UBIS) for calcaneus and (UTTK-01 and Omnisense) for tibia) and for phalanges.
    Apr 10, 2012
  • Mikhail Protopopov · Kazan State Medical University
    Dear Rafael, please kindly see the link below, this might be of some help. Best regards.
    http://www.thefreelibrary.com/Quantitative+Ultrasound+%28QUS%29-a0208452834
    Apr 10, 2012
  • Marco Atteritano · Università degli Studi di Messina
    Dear colleague, i have some experience with bone ultrasound densitometry (calcaneus and phalanges). Can you contact me for your questions.
    Apr 10, 2012
  • Dale Newton ·
    Some inventors claim that QUS can be used to estimate bone age -- see US Patent Applications 20030065264, 20080214935. Although I have no direct experience with QUS -- to my knowledge, the use of QUS to estimate bone age is not well known or used in the everyday clinical practice of Diagnostic Radiology in the USA. Typically, most hospitals and imaging centers in the US use dual-energy x-ray absorptiometry (DEXA) for the evaluation of osteoporosis -- NOT bone age. For an estimate of bone age, a plain film xray of the hand has been the "gold standard" for at least the past 30 years that I've practiced as a Radiologist -- and for several very good reasons. Hope this helps.
    Apr 11, 2012
  • Zhou Qinghui · Youjiang Medical University for Nationalities
    The unit is db/MHz
    Apr 11, 2012
  • Dana Stoian · Victor Babes University of Medicine and Pharmacy of Timisoara
    Qus measures the SOS( speed of sound) and the BUA (atenuation of ultrasound in the bone). there are some QUS recognised by ISCD (look in the internet for the Society they organise trainings for Clicinacl densitometry- CCD) both for DXA and QUS and you could learn more. This recognised devices also calculate a parameter called stifness and try to have a rol ij the screening for osteoorosis.
    Apr 11, 2012
  • Reinaldo Cesar · University of São Paulo
    Yes, I have experinece!
    Apr 11, 2012
  • Jenn-Huei Renn · VGHKS Kaohsiung Veterans General Hospital
    Most literatures recognized QUS as a modality of bone mass screen method, and cannot be used for diagnosing osteoporosis.
    Apr 15, 2012
  • Antonis Kambas · Democritus University of Thrace
    Transaxial QUS is a relatively new technique used to assess bone strength in the general population, as well as in children and adolescents and measures the speed of sound that travels along the
    bone. QUS is not affected by bone size, allowing for easy comparisons between children of different sizes.
    Apr 19, 2012
  • Wojciech Glinkowski · Medical University of Warsaw
    By the way - units - for speed of sound is measured in m/s as speed general
    Attenuation is measured in dB/MHz
    and stiffness is na index of both above calculated only for Achilles device expressed as statistical measure T-score / Z -score. Through the speed of sound strength of the bone can be calculated when equation of wave impedance and presented as Young's modulus.
    So from the ultrasound diagnost can say more about the bone strength than drom DXA but the location of the measurement does matter.

    Another issue is the inadequate expression of ultrasound imaging of bone with QUS - because it is a simple measurement (adapted from defectoscopy - nondestructive testing of materials).
    So the "ultrasonometry" fits better
    Apr 20, 2012
  • Sylvain Haupert · French National Centre for Scientific Research
    My lab is well recognized for major contributions about Bone Quantitative Ultrasound. (http://www.labos.upmc.fr/lip/)
    Have a look to this book written by experts in bone quantitative ultrasound :
    http://books.google.fr/books?hl=en&lr=&id=mrzJhCQ2bg0C&oi=fnd&pg=PR5&dq=bone+quantitative+ultrasound&ots=C1dzhlV-2s&sig=fljRyxuJMQ1nEWkV6emN5ABoknY#v=onepage&q=bone%20quantitative%20ultrasound&f=false
    May 3, 2012
  • Wojciech Glinkowski · Medical University of Warsaw
    Great link
    THX
    May 3, 2012

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