Prostate volume determination: Differential volume measurements comparing CT and TRUS

Kälkner, Karl Mikael; Kubicek, Gregory J.; Nilsson, Josef; Lundell, Marie; Levitt, Seymour H.; Nilsson, Sten

doi:10.1016/j.radonc.2006.10.003

Cited by 32 publications

(27 citation statements)

References 20 publications

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“…Interestingly, no relationship was found between prostate volume and hormonal levels and AR CAG length, and also dividing KS subjects on the basis of testosterone plasma levels (!10.4 or R10.4 nmol/l), we found no statistical differences in prostate volume between the two considered groups. These findings support the hypothesis that obesity, insulin resistance, and glucose or lipid metabolism might be important for prostate size as well as androgens and/or estrogens (13,22).…”

Section: Discussionsupporting

confidence: 85%

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Prostate volume and growth during testosterone replacement therapy is related to visceral obesity in Klinefelter syndrome

Selice

Caretta

Mambro

et al. 2013

European Journal of Endocrinology

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Objective: Klinefelter syndrome (KS) is a chromosomal alteration characterized by increased risk of metabolic syndrome, mainly caused by visceral obesity. In the last years, obesity has been studied as a potential risk factor for prostate disease and recently a link has been demonstrated between visceral adiposity with prostate volume. The aim of this study was to analyze the relationship between obesity and prostate volume and growth during testosterone therapy in KS subjects. Design and methods: We evaluated reproductive hormones, metabolic parameters, anthropometric measures, PSA, and prostate volume in 121 naïve non-mosaic KS patients and 60 age-matched healthy male controls. Fifty-six KS hypogonadic subjects were treated with testosterone-gel 2% and reevaluated after 18 months of treatment. Results: Prostate volume in KS was positively related to waist circumference (WC). The KS group with WC R94 cm had significantly higher prostate volume, BMI, insulin plasma levels, homeostasis model assessment index, total cholesterol, triglycerides, and glycemia with respect to the KS group with WC !94 cm. After testosterone replacement therapy, only hypogonadic KS men with WC R94 cm had a statistically significant increase in prostate volume. Furthermore, in untreated KS subjects, prostate volume showed a statistically significant increase after 18 months of follow-up only in subjects with WC R94 cm. Conclusions: This study showed that visceral obesity, insulin resistance, and lipid and glucose metabolism alterations are associated with prostate volume and growth during testosterone replacement therapy in KS, independently from androgen or estrogen levels. These latter findings might provide the basis for a better management and follow-up of KS subjects.

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Section: Discussionsupporting

confidence: 85%

“…Prostate volume was calculated using the standard ellipsoid formula (width!height!length! p/6, CV) (22). Intra-observer variability was estimated to be !10%.…”

Section: Prostate Ultrasoundmentioning

confidence: 99%

Prostate volume and growth during testosterone replacement therapy is related to visceral obesity in Klinefelter syndrome

Selice

Caretta

Mambro

et al. 2013

European Journal of Endocrinology

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“…In our study, the estimated weight was always lower than the actual weight with TAUS and TRUS, whereas with CT the estimated weight was higher than the actual prostate weight, except for the group with prostates heavier than 80 g. Kälkner et al compared CT and TRUS prostate volumes of patients who were to be treated with conformal radiotherapy and brachytherapy combination for localized prostate cancer (17). They observed that prostate volumes on CT were 48% greater than the prostate volumes calculated with the TRUS ellipse formula.…”

Section: Discussionmentioning

confidence: 48%

“…In more horizontal sections the anterior-posterior dimension increases, whereas the cranio-caudal size decreases. However, Kälkner et al noted that this cross-sectional angle difference cannot fully explain the variations in size alone (17).…”

Section: Discussionmentioning

confidence: 99%

What is the best radiological method to predict the actual weight of the prostate?

Kılıç¹,

Özdemır²,

Altinova³

et al. 2014

Turk J Med Sci

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The purpose of the present study was to investigate the composition of kidney stones removed from human patients. Seventeen samples were collected after surgery (5 females and 12 males; age range 2 to 60 years). The samples were analyzed for composition by transmission Fourier transform infrared (FT-IR) spectroscopy. The 17 analyzed samples of kidney stones comprised 29.4% calcium oxalate, 29.4% uric acid, 29.4% calcium oxalate (CaOx)-uric acid, 5.9% phosphate, and 5.9% calcium oxalate-phosphate stones. The results of the study indicated that transmission FT-IR spectroscopy could be used as an environmentally friendly technique for rapid screening of kidney stones.

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“…In such cases, software-aided volumetric evaluation is necessary. 22,23 This paper presents a complete methodology for registering 3D pre-operative and post-operative CT data sets for assessing their volumetric differences, corresponding to bone augmentation in the alveolar region for the particular sets. Therefore, the purpose of this study is twofold; firstly, to describe the methods and techniques used to automatically align the 3D data and secondly, to define a suitable volumetric assessment scheme in order to quantify and evaluate the difference between the pre-operative and the aligned post-operative data sets.…”

Section: Introductionmentioning

confidence: 99%

Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data

Economopoulos¹,

Asvestas²,

Matsopoulos³

et al. 2012

Dentomaxillofacial Radiology

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Objective: The purpose of this study is to propose a complete methodology for automatically registering three-dimensional (3D) pre-operative and post-operative CT scan dental volumes as well as to provide a toolset for quantifying and evaluating their volumetric differences. Methods: The proposed methodology was applied to cone beam CT (CBCT) data from 20 patients in order to assess the volume of augmented bone in the alveolar region. In each case, the pre-operative and post-operative data were registered using a 3D affine-based scheme. The performance of the 3D registration algorithm was evaluated by measuring the average distance between the edges of the registered sets. The differences between the registered sets were assessed through 3D subtraction radiography. The volume of the differences was finally evaluated by defining regions of interest in each slice of the subtracted 3D data and by combining all respective slices to model the desired volume of interest. The effectiveness of the algorithm was verified by applying it to several reference standard-shaped objects with known volumes. Results: Satisfactory alignment was achieved as a low average offset of 1.483 ¡ 1.558 mm was recorded between the edges of the registered sets. Moreover, the estimated volumes closely matched the volumes of the reference objects used for verification, as the recorded volume differences were less than 0.4 mm 3 in all cases. Conclusion: The proposed method allows for automatic registration of 3D CBCT data sets and the volumetric assessment of their differences in particular areas of interest. The proposed approach provides accurate volumetric measurements in three dimensions, requiring minimal user interaction.

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Prostate volume determination: Differential volume measurements comparing CT and TRUS

Cited by 32 publications

References 20 publications

Prostate volume and growth during testosterone replacement therapy is related to visceral obesity in Klinefelter syndrome

Prostate volume and growth during testosterone replacement therapy is related to visceral obesity in Klinefelter syndrome

What is the best radiological method to predict the actual weight of the prostate?

Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data

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