Quantitative ultrasound and bone mineral density measurements at the proximal phalanges in rheumatoid arthritis

Quantitative ultrasound bone measurement

“…(McCue CUBA clinical: precision: BUA 1.5-4.0 %, SOS 0.2-0.6 % or Hologic Sahara: precision: BUA 0.8-2.5 %, SOS 0.2-0.4 %, QUI 1.0-2.0 %) for acoustic coupling. • Calcaneal transmission imaging devices using a pair of scanning focused transducers immersed in a water bath at room temperature [83, 84] (DMS UBIS 3000: precision: BUA 0.8-2.5 %, SOS 0.2-0.4 %; Osteometer DTU-1: precision: BUA 0.8-2.5 %, SOS, 0.2-0.4 %).• Single point QUS systems for measurements at the finger phalanges using gel-coupling[85][86][87][88][89][90][91][92] and allowing to measure the amplitude dependent speed of sound (Ad-SOS) through the distal metaphysis of the phalanges of the 4 fingers (IGEA DBM Sonic 1200: precision: AD-SOS 0.5-1.0 %), and finally • Assessment of ultrasound velocity measurements of the tibial cortex using gel coupling[68,93,94] (Myriad Soundscan 2000: precision: SOS 0.2-1.0 %). The system differs from those previously mentioned in that it measures velocity longitudinally along the middle third of the anterior tibia.…”