Three-Dimensional Ultrasound for the Measurement of Choroidal Melanomas

Romero, Juan; Finger, Paul T.; Rosen, Richard B.; Iezzi, Raymond

doi:10.1001/archopht.119.9.1275

Cited by 59 publications

(24 citation statements)

References 22 publications

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“…These technological innovations offer a considerable improvement over mechanical systems when considering the ease of operation, freedom in the scanning pattern, and probe angulation. 6 The clinical usefulness of 3D US volume measurements has been successfully tested in vivo for various objects such as kidneys, 7 the prostate, 8 heart ventricles, 9 intraocular tumors, 10 and choroidal melanomas 11 and has shown better correlation with reference volumes than routine 2D US.…”

mentioning

confidence: 99%

Three-Dimensional Ultrasonography for Volume Measurement of Thyroid Nodules in Children

Lyshchik

Дрозд²,

Schloegl

et al. 2004

Journal of Ultrasound in Medicine

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Objective. The aim of this study was to compare the accuracy of thyroid nodule volume measurements performed by 2-and 3-dimensional ultrasonography and to evaluate the dependence of volume measurement results on nodule size and echographic characteristics. Methods. Results of multiple 2-and 3-dimensional ultrasonographic volume measurements of thyroid nodules in 102 children with different variants of thyroid nodular disease were reviewed retrospectively. The standardized difference, within-observer variability, and repeatability were estimated for both 2-and 3-dimensional ultrasonography. The mean age of the patients ± SD in the examined group was 14.9 ± 2.8 years; the mean volume of thyroid nodules was 0.78 ± 0.13 mL. Results. The SD of the normalized difference for 3-dimensional ultrasonography (2.8%) showed the clear superiority of its accuracy over 2-dimensional ultrasonography (15.9%; F test, P < .01). Intraobserver variability and repeatability for both examined methods had significant dependence on the nodule outline. For 2-dimensional ultrasonography, the intraobserver variability increased from 14.0% in nodules with a regular outline to 24.5% in those with an irregular outline (P < .001), and for 3-dimensional ultrasonography, it increased from 5.1% to 9.3% (P < .001). Intraobserver repeatability dropped from 85.4% in regular nodules to 74.6% in irregular nodules (P < .001) for 2-dimensional ultrasonography and from 94.7% to 90.4% (P < .001) for 3-dimensional ultrasonography. Conclusions. Volume measurements by 3-dimensional ultrasonography are more accurate, showing lower intraobserver variability and higher repeatability, than those made by 2-dimensional ultrasonography with less dependence on nodule size and echographic characteristics. Key words: 3-dimensional ultrasonography; thyroid nodules; volume measurements. Abbreviations 3D, three-dimensional; 3D US, 3-dimensional ultrasonography; 2D US, 2-dimensional ultrasonography n the past 15 years, high-frequency B-mode 2-dimensional ultrasonography (2D US) has become the most widely used imaging modality for screening and diagnosis of thyroid nodular disease.1 The great flexibility of ultrasonography, its comparatively low cost, and other advantages, such as real-time imaging and the use of nonionizing radiation with no known bioeffects, make ultrasonography a first-choice diagnostic procedure in these patients. Results of North American and European thyroid association surveys have shown that ultrasonography is the most commonly used method of visualization in patients with thyroid nodules at the stage of initial A. V. Tuzikov, DSc, and P. V. Vasiliev

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confidence: 99%

Three-Dimensional Ultrasonography for Volume Measurement of Thyroid Nodules in Children

Lyshchik

Дрозд²,

Schloegl

et al. 2004

Journal of Ultrasound in Medicine

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“…Na literatura, em vários estudos (2,15) , muitos casos de melanoma de coróide são detectados na fase inicial da doença através de exames de rotina, estando os pacientes praticamente assintomá-ticos. No presente estudo, o tempo do início da sintomatologia até o atendimento inicial no Serviço de Oftalmologia do HRSJ foi em média de 152,12±114,00 dias.…”

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“…Estes dados são divergentes com outros estudos, onde a celularidade mista foi mais freqüentemente encontrada (2,7,(14)(15)19) . Os tumores fusiformes normalmente são menos agressivos clinicamente, com o crescimento mais lento e menor prevalência de metástases à distância.…”

Section: Discussionunclassified

Estudo de melanoma da coróide no Hospital Regional de São José - Santa Catarina

Júnior¹,

Neto²,

Lima³

et al. 2006

Arq. Bras. Oftalmol.

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“…14,15 The reason for this is that these measurements need a special ultrasonic equipment, peripherally located tumours cannot be measured exactly, and the eye of the patient should not move during the procedure. 15 So other authors focused on tumour volume calculation, based on easily available parameters like largest basal diameter, perpendicular diameter, and height based on the assumption that choroidal melanomas have a spherical, elliptical or biconvex shape.…”

Section: Discussionmentioning

confidence: 99%

“…7,[13][14][15][16][17][18] Measurements of the volume were made by using either a 3D i-scan or an ultrasonic 3D scanning system, which operates by an axial, back and forth, half-turn rotation of a sectorscanning transducer with image analysis by a computer, and have confirmed the method as repeatable, with good correlation to other tumour measurement techniques like diameter, height, or magnetic resonance. [13][14][15] Calculations of tumour volume were carried out by using different mathematical formulas. 7,[16][17][18] The formula used by Guthoff 16 was for the calculation of the biconvex-shaped volume of sectional area of two sphere segments.…”

Section: Introductionmentioning

confidence: 99%

Calculated tumour volume as a prognostic parameter for survival in choroidal melanomas

Richtig

Langmann

Müllner

et al. 2004

Eye

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Purpose Tumour diameter, tumour height, and tumour volume are considered important prognostic indicators of survival in choroidal melanomas. In this study, we investigated the prognostic impact on survival of the easily calculated volume estimate based on the assumption of a half-rotation ellipsoid. Methods The largest tumour diameter and tumour height were measured by ultrasound A-and B-scan in 93 patients with choroidal melanoma. Tumour volume was calculated by the half volume of a rotation ellipsoid formula, rotated around the y-axis, and compared to tumour diameter and tumour height. All parameters were correlated to the clinical outcome of the patients. Results At the time of diagnosis, the mean diameter was 10.4 mm (range 4.1-18.9 mm), and the mean height was 5.7 mm (range 1.74-14.9 mm). The range of the calculated tumour volume was between 11 and 628 mm 3 (mean volume 190 mm 3 ). Among all patients, distant metastases occurred in 10 patients (10.8%). In a univariate approach using Mantel-Haenszel log-rank test, the calculated tumour volume at the time of diagnosis was the best prognostic indicator of survival followed by tumour diameter and tumour height (P ¼ 0.028). When tumour volume, horizontal and vertical tumour diameter, age, sex, and primary tumour therapy were considered in a multivariate approach using Cox proportional Hazard model, only tumour volume turned out as a significant prognostic parameter (P ¼ 0.001). Conclusions Calculated tumour volume is a better prognostic indicator of survival of patients with choroidal melanomas than the largest tumour diameter and tumour height, and might be established in daily routine.

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Three-Dimensional Ultrasound for the Measurement of Choroidal Melanomas

Cited by 59 publications

References 22 publications

Three-Dimensional Ultrasonography for Volume Measurement of Thyroid Nodules in Children

Three-Dimensional Ultrasonography for Volume Measurement of Thyroid Nodules in Children

Estudo de melanoma da coróide no Hospital Regional de São José - Santa Catarina

Calculated tumour volume as a prognostic parameter for survival in choroidal melanomas

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