3D ultrasound DICOM data of the thyroid gland

2012 ◽  
Vol 51 (03) ◽  
pp. 73-78 ◽  
Author(s):  
A. Darr ◽  
J.-H. Schierz ◽  
E. Schleußner ◽  
S. Wiegand ◽  
T. Opfermann ◽  
...  
Keyword(s):  
Thyroid Gland ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Visual Assessment ◽  
3D Ultrasound ◽  
Volume Data ◽  
Dicom Standard ◽  
Cross Sectional ◽  
Volume Measurements ◽  
3D Processing

SummaryPurpose: It has recently become possible to generate and archive three-dimensional ultrasound (3D-US) volume data with the DICOM standard Enhanced Ultrasound Volume Storage (EUVS). The objective of this study was to examine the application of the EUVS standard based on the example of thyroid ultrasound. Patients, methods: 32 patients, who were referred for thyroid diagnosis, were given a 3D-US examination of the thyroid gland (GE Voluson E8, convex 3D probe RAB4–8-D). The 3D data sets were exported to EUVS. Necessary additions to DICOM entries and transformation into an established DICOM standard were carried out. The visual assessment and volume measurements were performed by two experts on nuclear medicine using standard software in our hospital. Results: In 24/32 (75%) of the patients, the whole organ was successfully recorded in a single 3D scan; in 8/32 (25%), only part of organ could be covered. In all cases, 3D-US data could be exported and archived. After supplementing the DICOM entry Patient Orientation and transformation into the DICOM PET format, 3D-US data could be displayed in the correct orientation and size at any viewing workstation and any web browser-based PACS viewer. Afterwards, 3D processing such as multiplanar reformation, volumetric measurements and image fusion with data of other cross sectional modalities could be performed. The intraclass correlation of the volume measurements was 0,94 and the interobserver variability was 5.7%. Conclusion: EUVS allows the generation, distribution and archiving of 3D-US data of the thyroid, facilitates a second reading by another physician and creates conditions for advanced 3D processing using routine software

Reference intervals and reliability of cavum septi pellucidi volume measurements by three-dimensional ultrasound between 19 and 24 weeks’ gestation

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Aslim Cinar ◽  
Mekin Sezik ◽  
Serenat Eris Yalcin ◽  
And Yavuz
Keyword(s):  
Gestational Age ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
3D Ultrasound ◽  
Reference Intervals ◽  
Reference Ranges ◽  
Fetal Ultrasound ◽  
Cavum Septi Pellucidi ◽  
Volume Measurements

AbstractObjectivesA small or a large cavum septi pellucidi (CSP) during routine second trimester sonography may suggest abnormal cerebral development. Therefore, determination of CSP volume with three-dimensional (3D) ultrasound can be valuable. For this purpose, we sought to evaluate the reference ranges and measurement reliability of CSP volume by Virtual Organ Computer-aided AnaLysis (VOCAL).MethodsVOCAL software was used to calculate the CSP volume from transabdominal multiplanar datasets of 99 structurally normal fetal ultrasound examinations between 19 and 24 weeks of gestation. Linear regression was utilized to determine reference intervals for CSP volumes as a function of gestational week (GW). Agreement among three evaluators with different proficiency levels (obstetrics and gynecology resident, perinatology fellow, and perinatologist) was assessed, using intraclass correlation coefficients (ICC) and 95% confidence intervals (CI).ResultsCSP volume and gestational age was positively correlated (r2=0.383, p=0.0001), represented by the following equation: 0.058–(1.016 x GW). Interobserver agreement between perinatologist and fellow was relatively high (ICC, 0.78; 95% CI, 0.70–0.85), whereas limited ultrasound experience (resident) was associated with fair agreement with non-novice observers (ICC for resident and perinatologist, 0.50; 95% CI, 0.29–0.65 and ICC for resident and fellow, 0.57; 95% CI, 0.38–0.71).ConclusionsReference ranges of CSP volumes using VOCAL from 19 0/6 through 24 6/7 weeks of gestation were established. A first-degree model to estimate CSP volume as a function of gestational age was also constructed. CSP volumetry seems reliable when evaluated by an examiner with particular 3D sonography experience.

scholarly journals Three-dimensional Capsular Volume Measurements in Multidirectional Shoulder Instability

2018 ◽  
Vol 21 (3) ◽  
pp. 134-137
Author(s):  
Yong Cheol Jun ◽  
Young Lae Moon ◽  
Moustafa I Elsayed ◽  
Jae Hwan Lim ◽  
Dong Hyuk Cha
Keyword(s):  
Rotator Cuff ◽  
Surface Area ◽  
Three Dimensional ◽  
Volume Measurement ◽  
Control Group ◽  
Two Dimensional ◽  
Cross Sectional ◽  
Volume Measurements ◽  
Glenoid Surface ◽  
3D Software

BACKGROUND: In a previous study undertaken to quantify capsular volume in rotator cuff interval or axillary pouch, significant differences were found between controls and patients with instability. However, the results obtained were derived from two-dimensional cross sectional areas. In our study, we sought correlation between three-dimensional (3D) capsular volumes, as measured by magnetic resonance arthrography (MRA), and multidirectional instability (MDI) of the shoulder.METHODS: The MRAs of 21 patients with MDI of the shoulder and 16 control cases with no instability were retrospectively reviewed. Capsular areas determined by MRA were translated into 3D volumes using 3D software Mimics ver. 16 (Materilise, Leuven, Belgium), and glenoid surface area was measured in axial and coronal MRA views. Then, the ratio between capsular volume and glenoid surface area was calculated, and evaluated with control group.RESULTS: The ratio between 3D capsular volume and glenoid surface area was significantly increased in the MDI group (3.59 ± 0.83 cm³/cm²) compared to the control group (2.53 ± 0.62 cm³/cm²) (p < 0.01).CONCLUSIONS: From these results, we could support that capsular volume enlargement play an important role in MDI of the shoulder using volume measurement.

scholarly journals Rotational Three-dimensional OCTA: a Notable New Imaging Tool to Characterize Type 3 Macular Neovascularization

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Enrico Borrelli ◽  
Riccardo Sacconi ◽  
Gerd Klose ◽  
Luis de Sisternes ◽  
Francesco Bandello ◽  
...  
Keyword(s):  
3D Visualization ◽  
Three Dimensional ◽  
Cross Sectional Study ◽  
Age Related Macular Degeneration ◽  
Volume Data ◽  
Cross Sectional ◽  
Imaging Tool ◽  
Age Related ◽  
Treatment Naïve ◽  
Type 3

AbstractThis study explored whether rotational three-dimensional (3D) visualization of optical coherence tomography angiography (OCTA) volume data may yield valuable information regarding type 3 macular neovascularization (MNV). In this retrospective, cross-sectional study, we collected data from 15 eyes (13 patients) with treatment-naïve type 3 MNV in their post-nascent stage and age-related macular degeneration (AMD). Subjects were imaged with the SS-OCT system (PLEX Elite 9000, Carl Zeiss Meditec Inc., Dublin, CA, USA). The OCTA volume data were processed with a prototype volume projection removal algorithm and then analyzed using volumetric visualization techniques in order to obtain a 3D visualization of the region occupied by type 3 MNV. The two-dimensional and three-dimensional OCTA images were investigated. Mean ± SD age was 75.1 ± 7.4 years. BCVA was 0.42 ± 0.21 LogMAR in the study eyes. Considering the cohort of analyzed eyes, on rotational 3D OCTA images, a total of 35 neovascular lesions (vs 22 lesions detected on 2D OCTA images) rising from the deep vascular complex and variably spanning the outer retinal layers and eventually reaching the RPE/sub-RPE space were detected. Nine of 35 lesions had a saccular shape, while the remaining cases had a filiform shape. On rotational 3D OCTA images, these lesions were inclined on the three planes, instead of perpendicular to the RPE/Bruch’s membrane. In conclusion, this study used an algorithm to obtain rotational three-dimensional visualization of type 3 MNV. This approach seems to increase the detection rate for these lesions and to be useful to offer new insight into type 3 MNV.

Progressive brain changes in schizophrenia: a 1-year follow-up study of diffusion tensor imaging

2009 ◽  
Vol 21 (6) ◽  
pp. 301-307 ◽  
Author(s):  
Miho Ota ◽  
Satoko Obu ◽  
Noriko Sato ◽  
Katsuyoshi Mizukami ◽  
Takashi Asada
Keyword(s):  
Diffusion Tensor Imaging ◽  
Diffusion Tensor ◽  
Three Dimensional ◽  
Anterior Cingulate ◽  
Volume Data ◽  
Cross Sectional ◽  
Schizophrenic Patients ◽  
Brain Changes ◽  
Magnetic Resonance Imaging Mri

Objective:Recent cross-sectional studies suggest that brain changes in schizophrenia are progressive during the course of the disorder. However, it remains unknown whether this is a global process or whether some brain areas are affected to a greater degree. The aim of this study was to examine the longitudinal brain changes in patients with chronic older schizophrenia by magnetic resonance imaging (MRI).Methods:Three-dimensional (3D) T1-weighted and diffusion tensor (DT) MRI were performed twice on each of 16 chronic older schizophrenia patients (mean age = 58.1 ± 6.7 years ) with an interval of 1 year between imaging sessions. To clarify the longitudinal morphological and white matter changes, volume data and normalised diffusion tensor imaging (DTI) metrics were compared between the first and follow-up studies using a paired t-test.Results:Focal cortical volume loss was observed in the left prefrontal lobe and anterior cingulate on volumetric study. In addition, DTI metrics changed significantly at the bilateral posterior superior temporal lobes, left insula, genu of the corpus callosum and anterior cingulate.Conclusion:There are ongoing changes in the brains of schizophrenic patients during the course of the illness. Discrepancies between volume data and DTI metrics may indicate that the pattern of progressive brain changes varies according to brain region.

scholarly journals Comparative Three-Dimensional Morphology of Baleen: Cross-Sectional Profiles and Volume Measurements Using CT Images

2017 ◽  
Vol 300 (11) ◽  
pp. 1942-1952 ◽  
Author(s):  
Megan M. Jensen ◽  
Amalia H. Saladrigas ◽  
Jeremy A. Goldbogen
Keyword(s):  
Three Dimensional ◽  
Ct Images ◽  
Cross Sectional ◽  
Volume Measurements

Three-dimensional measurement of growth of ossification of the posterior longitudinal ligament

2012 ◽  
Vol 16 (3) ◽  
pp. 289-295 ◽  
Author(s):  
Takahito Fujimori ◽  
Motoki Iwasaki ◽  
Yukitaka Nagamoto ◽  
Takahiro Ishii ◽  
Hironobu Sakaura ◽  
...  
Keyword(s):  
Multidetector Ct ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Ct Scanning ◽  
Posterior Longitudinal Ligament ◽  
Progression Rate ◽  
Volume Data ◽  
Volume Increase ◽  
True Value ◽  
The Mean

Object Ossification of the posterior longitudinal ligament (OPLL) is a progressive disease that causes cervical myelopathy. Because 2D evaluation of ossification growth with plain lateral radiographs has limitations, the authors developed a unique technique to measure ossification progression and volume increase by using multidetector CT scanning. Methods The authors used serial thin-slice volume data obtained by multidetector CT scanning in 5 patients. The mean patient age was 63 years, and the mean follow-up duration was 3.1 years. First, a 3D model of OPLL was semiautomatically segmented at a specific threshold. Then, a preoperative model of OPLL was superimposed on a postoperative model using voxel-based registration of the vertebral bodies. Progression and volume increase were measured using a digital viewer that was developed by the authors. Progression was visualized using a color-coded contour on the surface of the OPLL model. Results All patients had progression of 0.5 mm or greater. The mean values concerning OPLL growth were as follows: maximum progression length, 4.7 mm; progression rate, 1.5 mm/year; volume increase, 1622 mm3; volume expansion rate, 37%; and volume increase rate, 484 mm3/year. The accuracy of superimposition by voxel-based registration, defined as closeness to the true value, was less than 0.31 mm. For intraobserver reproducibility of the volume measurement, the mean intraclass correlation coefficient, root mean square error, and coefficient of variation were 0.987, 16.0 mm3, and 1.7%, respectively. Conclusions Ossification of the posterior longitudinal ligament progresses even after surgery. Three-dimensional evaluation with the aid of CT scans is a useful and reliable method for assessing that growth.

scholarly journals Reproducibility in pelvic floor biometric parameters of nulliparous women assessed by translabial three-dimensional ultrasound using Omniview reformatting technique.

2016 ◽  
Vol 18 (3) ◽  
pp. 345 ◽  
Author(s):  
Zsuzsanna Ilona Katalin Jármy-Di Bella ◽  
Edward Araujo Júnior ◽  
Claudinei Alves Rodrigues ◽  
Luiza Torelli ◽  
Wellington P. Martins ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
Pelvic Floor Dysfunction ◽  
Three Dimensional ◽  
3D Ultrasound ◽  
Observer Agreement ◽  
Cross Sectional ◽  
Biometric Parameters ◽  
Observer Reliability ◽  
Hiatal Area ◽  
Nulliparous Women

Aim: To assess the reproducibility of pelvic floor biometric parameters by translabial three-dimensional ultrasound compared with the OmniView® reformatting technique. Material and methods: We performed a cross-sectional study involving 47 nulliparous women without symptoms of pelvic floor dysfunction. The hiatal area and right pubovisceral muscle width measurements were performed in the axial plane using both 3D ultrasound in the rendering mode and OmniView® techniques. To determine the occurrence of standardized error between examiners and the two sonographic methods, the paired t-test was used. The intra- and inter-observer reliability and agreement were estimated by concordance correlation coefficient (CCC) and limits of agreement, respectively. Results: We did not observe significant statistical differences among both measurements performed by the first examiner, both examiners and both methods in the assessment of the hiatal area; however, the measurements of the right pubovisceral muscle were significantly lower using OmniView®. The intra-observer reliability was good in the evaluation of all pelvic floor parameters; however, the inter-observer reliability was good only to the 3D rendering mode (CCC=0.87). The intra-observer agreement was good in the assessment of all pelvic floor parameters; however, the inter-observer agreement was found to be good only when 3DUS in the rendering mode was used (<±15%). Conclusion: Both 3D ultrasound in the rendering mode and OmniView® reformatting techniques were concordant in the assessment of pelvic floor parameters; however, the 3D ultrasound rendering in the mode demonstrated better inter-observer reliability and agreement.

Evaluating the agreement between the empirical volumes of tumor lesions and the estimated volumes of tumor lesions based on the longest diameter.

2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 635-635 ◽  
Author(s):  
Ruediger P. Laubender ◽  
Michael Schlichting ◽  
Ute Sartorius ◽  
Dominik Paul Modest ◽  
Ulrich Robert Mansmann ◽  
...  
Keyword(s):  
Tumor Volume ◽  
Three Dimensional ◽  
Disease Process ◽  
Volume Data ◽  
Limits Of Agreement ◽  
Altman Plot ◽  
Bland Altman Plot ◽  
Volume Measurements ◽  
Colorectal Cancer Patients ◽  
The Impact

635 Background: Tumor lesions are commonly evaluated by RECIST or WHO criteria, which involves reducing the development of a three-dimensional tumor to a two-dimensional process. However, volume measurements might reflect the clinical impact of the disease process more precisely. Therefore, we investigated if the volume of a tumor lesion can be reconstructed from RECIST- or WHO-based measurements. Methods: 20 colorectal cancer patients underwent routine staging MDCT examinations as part of the multicenter phase II CIOX trial comparing cetuximab + XELOX versus cetuximab + XELIRI. Two hepatic target lesions per patient were defined at baseline and measured using 1) semi-automated volumetry (Siemens Syngo Via Oncology, Siemens Healthcare) with manual correction and 2) semi-automated measurement of the longest diameter (LD) according to RECIST 1.1 and the corresponding longest orthogonal diameter (LOD). Patient lesions were followed over time using the same measurement strategies. An algorithm was developed for reconstructing the volume of a lesion based on the LD and the corresponding LOD. Agreement of the volume data generated by both methods was analyzed by a Bland-Altman plot. The limits of agreements were calculated using a variance components model considering repeated tumor assessments based on the log-transformed sum over the volume of a patient’s lesions. Results: 151 lesions from the 20 patients were measured at 73 tumor assessments. Volume was slightly overestimated by the algorithm compared to the volumetric measurements (p = 0.07). The Bland-Altman plot showed good agreement (mean difference −0.05, limits of agreement [−0.40, 0.30]). As expected, three out of the 73 measurements fell outside the limits of agreement. Conclusions: The proposed algorithm for the WHO-based reconstruction of the tumor volume provides a good approximation to the true sum of the volumes of the lesions. In future studies, volumetric tumor information can be included even if not all centers have full volumetric software available. This enables further research on the impact of changes in tumor volume on disease prognosis and/or prediction of treatment efficacy.

Development and Validation of the Nurse Prescribing Self-Efficacy Scale

2020 ◽  
pp. 019394592096250
Author(s):  
Teresa Galiana-Camacho ◽  
María Dolores Ruiz-Fernandez ◽  
Iria Dobarrio-Sanz ◽  
José Granero-Molina ◽  
Cayetano Fernandez-Sola ◽  
...  
Keyword(s):  
Internal Consistency ◽  
Content Validity ◽  
Self Efficacy ◽  
Intraclass Correlation ◽  
Temporal Stability ◽  
Three Dimensional ◽  
Cross Sectional Study ◽  
Dimensional Structure ◽  
Cross Sectional ◽  
Nurse Prescribing

Low self-efficacy is a barrier to effective nurse prescribing. Therefore, nurses’ self-efficacy should be assessed using validated tools. We aimed to develop and psychometrically test the Nurse Prescribing Self-Efficacy Scale (NP-SES). We conducted an observational cross-sectional study with 290 nurses between January and June 2019. We studied the NP-SES’ reliability (i.e., internal consistency and temporal stability), validity (i.e., content, criterion, and construct) and legibility. The NP-SES showed good internal consistency (Cronbach’s alpha=0.958) and temporal stability (intraclass correlation coefficient=0.783). The NP-SES also showed good content validity (scale’s content validity index=0.98) and criterion validity ( r=0.75; p<0.001). Construct validity analysis revealed the NP-SES’ three-dimensional structure and showed its ability to detect significant differences between nurses with different levels of experience. Our psychometric analysis suggests that the NP-SES is a reliable and valid instrument that could be used to assess nurses’ self-efficacy in nurse prescribing.

scholarly journals Anatomical sacral slope, a new pelvic parameter, is associated with lumbar lordosis and pelvic incidence in healthy Japanese women: A retrospective cross-sectional study

2019 ◽  
Vol 28 (1) ◽  
pp. 230949901988880
Author(s):  
Hayato Suzuki ◽  
Norio Imai ◽  
Asami Nozaki ◽  
Yuki Hirano ◽  
Naoto Endo
Keyword(s):  
Lumbar Lordosis ◽  
Pelvic Incidence ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
Normal Subjects ◽  
Cross Sectional Study ◽  
Sacral Slope ◽  
Cross Sectional ◽  
Pelvic Parameters

Purpose: Anatomical sacral slope (a-SS), a pelvic anatomical parameter that does not require the center of the femoral head, strongly correlates with pelvic incidence (PI) during three-dimensional measurements in normal subjects. Sagittal alignment of spinal and pelvic parameters is typically evaluated using two-dimensional radiographs; however, the relationship between a-SS and PI has not been evaluated using radiographs. This study aimed to evaluate the correlation between a-SS and other spinal and pelvic parameters using radiographs. Methods: We evaluated 144 healthy women. Using sagittal radiographs, we measured lumbar lordosis (LL), thoracic kyphosis, PI, SS, pelvic tilt, and a-SS, which were defined as the angle between the superior end plate of S1 and a line perpendicular to the anterior pelvic plane. Pearson coefficients were used to determine correlations, and intraobserver and interobserver intraclass correlation coefficients (ICCs) were used for validation. Results: There was a strong correlation between PI and a-SS ( r = 0.756). Moreover, correlations between a-SS and LL and between PI and LL were similar ( r = 0.661 and r = 0.554, respectively). The intraobserver ICCs were 0.884 for a-SS and 0.840 for PI. The interobserver ICCs were 0.856 for a-SS and 0.653 for PI. Conclusion: a-SS was strongly correlated with PI. The correlation between a-SS and LL was equivalent to the correlation between PI and LL. Moreover, the ICC for a-SS was larger than that of PI. This study suggests that a-SS is a useful new pelvic anatomical parameter that can be used instead of PI.

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