Abdominal fat volume estimation by stereology on CT: a comparison with manual planimetry

Manios, G. E.; Mazonakis, Michalis; Voulgaris, Costas; Karantanas, Apostolos H.; Damilakis, John

doi:10.1007/s00330-015-3865-2

Cited by 7 publications

(9 citation statements)

References 35 publications

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“…For instance, the percent error reported from using the planimetry approach was between 1% and 19% [1,2]. Manios et al [10] reported an error ranging from 5% to 9% using the random marking method. Additionally, an error of 2% +/− 5.4% was found from the segmentation method [15].…”

Section: Discussionmentioning

confidence: 99%

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CT Volumetry of Convoluted Objects—A Simple Method Using Volume Averaging

Al-Senan

Newhouse

2021

Tomography

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Accurate measurement of object volumes using computed tomography is often important but can be challenging, especially for finely convoluted objects with severe marginal blurring from volume averaging. We aimed to test the accuracy of a simple method for volumetry by constructing, scanning and analyzing a phantom object with these characteristics which consisted of a cluster of small lucite beads embedded in petroleum jelly. Our method involves drawing simple regions of interest containing the entirety of the object and a portion of the surrounding material and using its density, along with the densities of pure lucite and petroleum jelly and the slice thickness to calculate the volume of the object in each slice. Comparison of our results with the object’s true volume showed the technique to be highly accurate, irrespective of slice thickness, image noise, reconstruction planes, spatial resolution and variations in regions of interest. We conclude that the method can be easily used for accurate volumetry in clinical and research scans without the need for specialized volumetry computer programs.

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Section: Discussionmentioning

confidence: 99%

“…Other, more sophisticated approaches include: Utilization of a histogram of CT numbers to identify object size [ 8 , 9 ]. A custom-made software has been used for this method [ 10 ]. A semiautomatic method in which software interpolates an organ contour from a manually outlined contour in one slice [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

CT Volumetry of Convoluted Objects—A Simple Method Using Volume Averaging

Al-Senan

Newhouse

2021

Tomography

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“…Optimized stereological method has been proposed as an alternative technique which can significantly lower the required manual work. It has been studied before in different organs using MRI and CT.[ 33 34 35 36 37 ]…”

Section: Discussionmentioning

confidence: 99%

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Bontzos

Mazonakis

Papadaki

et al. 2020

Natl J Maxillofac Surg

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Introduction: Current volume measurement techniques, for the orbit, are time-consuming and involve complex assessments, which prevents their routine clinical use. In this study, we evaluate the applicability and efficacy of stereology and planimetry in orbital volume measurements using magnetic resonance imaging (MRI). Materials and Methods: Prospective imaging study using MRI. Sheep craniums and human subjects were evaluated. Water-filling measurements were performed in animal skulls, as the standard validation technique. Planimetry and stereology techniques were used in each dataset. Intraobserver and interobserver reliability testing were applied. Results: In stereology customization, 1/6 systematic sampling scheme was determined as optimal with acceptable coefficient of error (3.09%) and low measurement time (1.2 min). In sheep craniums, the mean volume measured by water displacement, planimetry, and stereology was 17.81 ± 0.59 cm 3 , 18.53 ± 0.24 cm 3 , and 19.19 ± 0.17 cm 3 , respectively. Planimetric and stereological methods were highly correlated ( r = 0.94; P ≈ 0.001). The mean difference of the orbital volume using planimetry and stereology was 0.316 ± 0.168 cm 3 . In human subjects, using stereology, the mean orbital volume was found to be 19.62 ± 0.2 cm 3 with a CE of 3.91 ± 0.15%. Conclusions: The optimized stereological method was found superior to manual planimetry in terms of user effort and time spent. Stereology sampling of 1/6 was successfully applied in human subjects and showed strong correlation with manual planimetry. However, optimized stereological method tended to overestimate the orbital volume by about 1 cc, a considerable limitation to be taken in clinical practice.

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“…The stereological technique is an accurate and effective approach, which can be utilized to safely assessing the volume of biological structures (9). Planimetry is an approach for estimating the sectional area particularly by tracing the boundaries of the object of interest and is regarded as a valid method for volume estimation (10).…”

Section: Introductionmentioning

confidence: 99%

Stereological Estimation of Bone Cyst Volume Using Computed Tomography Images: A Comparison with the Planimetry Technique

Gölpınar

Say

Karabekir³

et al. 2022

Eur J Ther

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Objective: The exact volume of the bone cyst is fundamental for evaluation, treatment, and surgical management of the pathology related to any bone. The aim of this study was to introduce the stereological point-counting technique in bone cyst volume measurements on computed tomography images and to compare it with the planimetry technique. Methods: A total of 30 bone cyst volumes were estimated on CT images using stereological point-counting and the planimetry technique, which is based on the Cavalieri principle. The planimetric measurements were regarded as reference values. The stereological and planimetric volume estimations were performed by two independent observers twice. The estimation results of the two volumetric techniques were compared with the Wilcoxon signed-rank test. Intra-observer and inter-observer reliability of each volumetric technique was assessed. Results: For each bone cyst, 7-11 systematically sampled CT slices enabled reliable cyst volume estimations with a low coefficient of error (0.39%-3.12%). There was no significant difference between point counting and planimetry methods regarding volume measurements in both sessions (p>0.05), and these methods correlated well with each other. There was a significant inter-and intra-observer agreement for each volumetric method (ICC=0.9984 to 0.9988). The stereological approach was observed to take less time than the planimetric approach (mean 01:43±0.44 vs. 03.33±1:47 minutes) Conclusion: The stereological point-counting method can be well pertained to CT images for the reliable and reproducible assessment of bone cyst volume. Application of the point-counting method for volume estimation of bone cysts with different morphological features provides a great advantage in terms of both time-saving, applicability, and practicality in comparison with the planimetry technique. Keywords: Bone cyst, computed tomography, planimetry, stereology, volume measurement

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Abdominal fat volume estimation by stereology on CT: a comparison with manual planimetry

Cited by 7 publications

References 35 publications

CT Volumetry of Convoluted Objects—A Simple Method Using Volume Averaging

CT Volumetry of Convoluted Objects—A Simple Method Using Volume Averaging

Orbital volume measurements from magnetic resonance images using the techniques of manual planimetry and stereology

Stereological Estimation of Bone Cyst Volume Using Computed Tomography Images: A Comparison with the Planimetry Technique

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