The accuracy of a new system for estimating organ volume using ultrasound
Hughes, S.W., D'Arcy, T.J. , Maxwell, D.J. , Saunders, J.E. , Chinn, S. , & Sheppard , R.J. (1997) The accuracy of a new system for estimating organ volume using ultrasound. Physiological Measurement, 18(1), pp. 73-84.
A new system is described for estimating volume from a series of multiplanar 2D ultrasound images. Ultrasound images are captured using a personal computer video digitizing card and an electromagnetic localization system is used to record the pose of the ultrasound images. The accuracy of the system was assessed by scanning four groups of ten cadaveric kidneys on four different ultrasound machines. Scan image planes were oriented either radially, in parallel or slanted at 30 C to the vertical. The cross-sectional images of the kidneys were traced using a mouse and the outline points transformed to 3D space using the Fastrak position and orientation data. Points on adjacent region of interest outlines were connected to form a triangle mesh and the volume of the kidneys estimated using the ellipsoid, planimetry, tetrahedral and ray tracing methods. There was little difference between the results for the different scan techniques or volume estimation algorithms, although, perhaps as expected, the ellipsoid results were the least precise. For radial scanning and ray tracing, the mean and standard deviation of the percentage errors for the four different machines were as follows: Hitachi EUB-240, −3.0 ± 2.7%; Tosbee RM3, −0.1 ± 2.3%; Hitachi EUB-415, 0.2 ± 2.3%; Acuson, 2.7 ± 2.3%.
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|Item Type:||Journal Article|
|Keywords:||ultrasound, 3D, computed tomography, CT, magnetic resonance, MR, fetal livers, fetal organ volume|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Radiology and Organ Imaging (110320)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering|
|Copyright Owner:||Copyright 1997 IOP Publishing Ltd|
|Deposited On:||01 May 2012 08:49|
|Last Modified:||01 May 2012 14:44|
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