Three-dimensional Ultrasound Volumes Research Articles

The Accuracy and Diagnostic Value of Three-Dimensional Portable Bladder Volume Measurement System in the Measurement of Bladder Volume according to the Different Angling of Ultrasound Transducer

Purpose: The accuracy and reliability of a three-dimensional portable ultrasound bladder volume measurement system (BVMS), under two different angles (90 or 60 from cranial abdomen), for estimating the bladder volume was assessed. Materials and Methods: Ultrasonographic studies of the bladder volume, using a newly developed portable (2.4 kg) BVMS (BioCon-500, Mcube Technology, Korea), with real bladder images, were conducted on 154 patients (29-77 years old; M:F=116:38), at angles of 90 and 60 degrees, on the abdomen 2 cm above the symphysis pubis. This ultrasound-estimated volume was compared with the immediately catheterized volume. Comparison of BVMS estimated volumes with the catheterized volumes was performed according to the angles using the Pearson correlation coefficient, intra-class correlation coefficient (ICC) concordance and fractional absolute error (FAE). Results: Good agreement between the BVMS estimated and catheterized volumes was found for both angles (60: r=0.986, p<0.001, ICC=0.965; 90°: r=0.931, p<0.001, ICC=0.992). Although this was not significant, the linear correlation of the 60 degree estimation values seems to be higher than for those obtained at 90 degree’s. Various factors, such as age, sex, body mass index (BMI) and diagnosis, showed no correlation with the difference between the catheterized and BVMS estimated bladder volumes. Conclusions: Volume estimation using this BVMS is recommended as an alternative to catheterization for the determination of the bladder volumes both before and after voiding. The volume estimation of the transducer at 60 degrees, rather than that at 90 degrees, is recommended due to the field of view (FOV) limitation on ultrasound. However, these results demonstrate the need to standardize these procedures for volume estimations using BVMS. (Korean J Urol 2006;47:1320-1326)

Ultrasound-based navigation system incorporating preoperative planning for liver surgery

An overview of the current status of the development of our navigation system for resection of liver tumours is given. The system is based on intraoperative three-dimensional (3D) ultrasound volumes for image-guided navigation of surgical instruments. It is also possible to perform a virtual 3D planning of the tumour resection and to non-rigidly register these preoperative models to the intraoperative ultrasound volume.

OC078: Three-dimensional ultrasound fetal volume measurement: a study comparing the multiplanar technique with the rotational (VOCAL) technique

OC078: Three-dimensional ultrasound fetal volume measurement: a study comparing the multiplanar technique with the rotational (VOCAL) technique

Correction of probe pressure artifacts in freehand 3D ultrasound

We present an algorithm which combines non-rigid image-based registration and conventional position sensing to correct probe-pressure-induced registration errors in freehand three-dimensional (3D) ultrasound volumes. The local accuracy of image-based registration enables the accurate freehand acquisition of high resolution (>15 MHz) 3D ultrasound data, opening the way for 3D musculoskeletal examinations. External position sensor readings guarantee the large-scale positional accuracy of the data. Pressure correction is shown to dramatically increase the perceived quality of extended-field-of-view data sets and reslices through volumetric data sets, while quantitative comparisons of multiple in vivo volumes demonstrate the superior precision of the corrected data.

A new phantom for three-dimensional ultra-sound volume measurement : D.C. Barratt, K.N. Humphries, K.E. Fredfeldt, R.M. Greenhalgh, A.H. Davies. Department of Surgery, Charing Cross Hospital, London, UK

A new phantom for three-dimensional ultra-sound volume measurement : D.C. Barratt, K.N. Humphries, K.E. Fredfeldt, R.M. Greenhalgh, A.H. Davies. Department of Surgery, Charing Cross Hospital, London, UK

A New Phantom for Three-Dimensional Ultrasound Volume Measurement

A New Phantom for Three-Dimensional Ultrasound Volume Measurement

Birthweight prediction by three-dimensional ultrasound volumes of the fetal thigh and abdomen

Birthweight prediction by three-dimensional ultrasound volumes of the fetal thigh and abdomen

Three‐dimensional ultrasound: accuracy of distance and volume measurements

The aim of this study was to evaluate the accuracy of three-dimensional ultrasound distance and volume measurements using a commercially available three-dimensional ultrasound scanner. Sixty-two distance measurements were performed twice on an ultrasound tissue-mimicking phantom located in a water bath. Three-dimensional ultrasound distance measurements were compared to the actual distance. Volume measurements were made in a water bath with 21 balloons of various shapes ranging in volume from 20 ml to 490 ml. Three-dimensional ultrasound volume measurements were compared to actual balloon volumes and to conventional two-dimensional ultrasound volume calculations. The mean absolute error in three-dimensional ultrasound distance measurements was 1.0 +/- 0.8% (range, -2.3 to +1.9%) in the plane of acquisition and 1.0 +/- 0.6% (range, -2.0 to -0.2%) for planes with other orientations. Three-dimensional ultrasound volume measurements showed a mean absolute error of 6.4 +/- 4.4% (range, -6.0% to +15.5%), which was considerably better than two-dimensional ultrasound volume estimates having a mean absolute error of 12.6 +/- 8.7% (range, -27.5% to +39.2%). Volume measurements using two-dimensional ultrasound methods were much less accurate than three-dimensional ultrasound methods for irregularly shaped objects. In conclusion, our data show that three-dimensional ultrasound measurements of distance and volume are sufficiently accurate to use clinically.

Transvaginal three-dimensional ultrasound: accuracy of follicular volume measurements

To evaluate the accuracy of three-dimensional (3-D) ultrasound (US) follicular volume measurements. Prospective clinical study. A tertiary referral center for assisted reproduction. Twenty-five patients undergoing ovarian stimulation for IVF-ET using the long protocol of GnRH agonist. Transvaginal two-dimensional (2-D) and 3-D ovarian scan performed immediately before US-directed follicle aspiration. The volume of follicular fluid aspirated was compared with the corresponding volume of the follicle measured by 3-D US and with the conventional 2-D US volume measurement calculated using the formula pi/6 (D1 x D2 x D3). Limits of agreement and 95% confidence intervals were calculated and systematic bias between the methods was analyzed. The limits of agreement between the volume of follicular aspirate and follicular volume determined by US were +0.96 to -0.43 mL for 3-D measurements and +3.47 to -2.42 mL for 2-D measurements. The true volume of ovarian follicles, within the clinically useful range for IVF-ET cycles, is measured more accurately by a 3-D US system than by 2-D US techniques.