US with extended field of view: phantom-tested accuracy of distance measurements.
To evaluate the accuracy of distance measurements obtained with the extended-field-of-view (FOV) software of a commercially available ultrasonographic scanner, two custom-designed phantoms that allowed scanning of flat and curved surfaces were used. Five hundred forty measurements of various known distances in the phantoms were made by three examiners using various transducers. Although minor differences were observed between operators and transducers, 99.4% (537 of 540) of the distance measurements were accurate within plus or minus 4%. This extended-FOV technology provides accurate measurements of large objects in vitro.
Fornage
B D
BD
Department of Diagnostic Radiology, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA. bfornage@di.mdacc.tmc.edu
Atkinson
E N
EN
Nock
L F
LF
Jones
P H
PH
D002138:Calibration; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D015999:Multivariate Analysis; D015588:Observer Variation; D019047:Phantoms, Imaging; D012984:Software; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*