Main Page/SlicerCommunity/2021 - Revision history

Marianna at 19:11, 24 January 2023

2023-01-24T19:11:26Z

Marianna: /* Three-Dimensional Condylar Displacement and Remodelling Following Correction of Asymmetric Mandibular Prognathism With Maxillary Canting */

2022-06-01T22:17:53Z

Three-Dimensional Condylar Displacement and Remodelling Following Correction of Asymmetric Mandibular Prognathism With Maxillary Canting

Marianna: /* Comparing Three-Dimensional Models of Placenta Accreta Spectrum With Surgical Findings */

2022-06-01T22:12:43Z

Comparing Three-Dimensional Models of Placenta Accreta Spectrum With Surgical Findings

Marianna: /* Three-Dimensional Evaluation of Maxillary Second Molar Position in Untreated Patients With Normal Occlusion: Implications for Preadjusted Appliance Prescriptions */

2022-06-01T22:08:27Z

Three-Dimensional Evaluation of Maxillary Second Molar Position in Untreated Patients With Normal Occlusion: Implications for Preadjusted Appliance Prescriptions

Marianna: /* Comparison of Response Assessment in Veterinary Neuro-Oncology and Two Volumetric Neuroimaging Methods to Assess Therapeutic Brain Tumour Responses in Veterinary Patients */

2022-06-01T22:06:29Z

Comparison of Response Assessment in Veterinary Neuro-Oncology and Two Volumetric Neuroimaging Methods to Assess Therapeutic Brain Tumour Responses in Veterinary Patients

Marianna: /* The Relation Between the Metopic Suture Persistence and Frontal Sinus Volume and Olfactory Fossa Depth: A Reliability Study with Semiautomatic Volume Measurement */

2022-06-01T18:08:38Z

The Relation Between the Metopic Suture Persistence and Frontal Sinus Volume and Olfactory Fossa Depth: A Reliability Study with Semiautomatic Volume Measurement

Marianna: /* Volumetric Accuracy Analysis of Virtual Safety Barriers for Cooperative-Control Robotic Mastoidectomy */

2022-04-27T19:25:49Z

Volumetric Accuracy Analysis of Virtual Safety Barriers for Cooperative-Control Robotic Mastoidectomy

Marianna: /* Volumetric Assessment of Changes in the Alveolar Ridge Dimension Following GBR Using a Combination FDBA With Collagen Membrane or Novel Resorbable Scaffold: A Prospective Two-Center Clinical Trial */

2022-04-27T18:40:49Z

Volumetric Assessment of Changes in the Alveolar Ridge Dimension Following GBR Using a Combination FDBA With Collagen Membrane or Novel Resorbable Scaffold: A Prospective Two-Center Clinical Trial

Marianna: /* Using Three-Dimensional Visualization as an Optimal Tool to Plan and Validate an Aortopexy in a Congenital Heart Disease Patient With Severe Tracheal Stenosis */

2022-04-27T17:41:43Z

Using Three-Dimensional Visualization as an Optimal Tool to Plan and Validate an Aortopexy in a Congenital Heart Disease Patient With Severe Tracheal Stenosis

Marianna: /* Three-Dimensional Kinematic Evaluation of Lateral Suture Stabilization in an in Vitro Canine Cranial Cruciate Deficient Stifle Model */

2022-04-27T17:40:45Z

Three-Dimensional Kinematic Evaluation of Lateral Suture Stabilization in an in Vitro Canine Cranial Cruciate Deficient Stifle Model

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 __TOC__
 =2021=
 ==The Relation Between the Metopic Suture Persistence and Frontal Sinus Volume and Olfactory Fossa Depth: A Reliability Study with Semiautomatic Volume Measurement==

← Older revision		Revision as of 22:17, 1 June 2022
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	"To determine the BBB disruption field thresholds, a numerical model was constructed using COMSOL Multiphysics v5.6 (COMSOL Inc., Stockholm, Sweden) and a rat brain tissue domain was imported following segmentation from a T1W MRI scan using [http://www.slicer.org '''3D Slicer'''] v.4.10.		"To determine the BBB disruption field thresholds, a numerical model was constructed using COMSOL Multiphysics v5.6 (COMSOL Inc., Stockholm, Sweden) and a rat brain tissue domain was imported following segmentation from a T1W MRI scan using [http://www.slicer.org '''3D Slicer'''] v.4.10.
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−	~~==Three-Dimensional Condylar Displacement and Remodelling Following Correction of Asymmetric Mandibular Prognathism With Maxillary Canting==~~
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−	~~{\| width="100%"~~
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−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/34924271 Int J Oral Maxillofac Surg. 2021 Dec 17:S0901-5027(21)00425-2. PMID: 34924271]~~
−
−	~~'''Authors:''' Abotaleb BM, Bi R, Jiang N, Ye B, Bai Y, Al-Watary MQ, Zhu S.~~
−
−	~~'''Institution:''' Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, China.~~
−
−	'''Abstract:''' The aim of this study was to investigate the three-dimensional condylar displacement and long-term remodelling following the correction of asymmetric mandibular prognathism with maxillary canting. Thirty consecutive patients (60 condyles) with asymmetric mandibular prognathism >4 mm and occlusal canting >3 mm, treated by Le Fort I osteotomy and bilateral sagittal split ramus osteotomy, were included. Spiral computed tomography scans obtained at different periods during long-term follow-up (mean 17 ± 7.2 months) were gathered and processed using ITK-SNAP and 3D Slicer. The condyles were subjected to translational and rotational displacements immediately after the surgery (T2), which had not fully returned to the original preoperative positions at the last follow-up (T3). Condylar remodelling was observed at the last follow-up (T3), with the shorter side condyles subjected to higher surface resorption and overall condylar volume loss. The overall condylar volume on the shorter side was significantly reduced compared to the volume on the elongated side (-11.9 ± 90.6 vs -131.7 ± 138.2 mm3; P = 0.001). About 73%, 87%, 53%, and 54% of the shorter side condyles experienced resorption on the posterior, superior, medial, and lateral surfaces, respectively; in contrast, only 50% of the elongated side condyles showed resorption on the superior surface. Higher preoperative asymmetry was significantly correlated with increased postoperative condylar displacement (P < 0.05). The vertical asymmetry and the vector of condylar displacement were associated with the resultant remodelling process. It is concluded that condylar resorption of the shorter side condyle, which may affect the long-term surgical stability, has to be considered.
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 For the measurement, we used the preoperative CT scan of one of our cochlear implant patients. These images were processed by an open source and free image visualization software: [http://www.slicer.org '''3D Slicer'''].
 |}
 ==Long-Term Stability and Condylar Remodeling After Mandibular Advancement: A 5-Year Follow-Up==

← Older revision		Revision as of 22:08, 1 June 2022
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	\|}		\|}
−	~~==Three-Dimensional Evaluation of Maxillary Second Molar Position in Untreated Patients With Normal Occlusion: Implications for Preadjusted Appliance Prescriptions==~~
−
−	~~{\| width="100%"~~
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−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/33783560 J Orofac Orthop. 2021 Mar 30. PMID: 33783560]~~
−
−	~~'''Authors:''' Goracci C, Ruellas AC, Nieri M, Crouch S, McNamara JA Jr, Franchi L.~~
−
−	~~'''Institution:''' Department of Medical Biotechnologies, University of Siena, Policlinico Le Scotte, Siena, Italy.~~
−
−	'''Abstract:''' A sample of 41 subjects (16 females, 25 males) was selected from the University of Michigan Growth Study (UMGS). Digital dental casts with fully erupted second molars in occlusion were chosen (mean age 14.9 ± 1.3 years). Digital measurements were recorded with the open source software [http://www.slicer.org '''3D Slicer''']. The digital measurements of the UMGS sample were compared with the manual measurements collected by Andrews from his sample of untreated class I subjects with normal overbite and overjet. Two mixed effect models (sagittal and transversal inclinations) were performed. The "random effect" was represented by the subjects, while the "fixed effects" were the two compared groups, the side of the arch (right and left), and the group × side interaction. Outcome variables were sagittal and transversal inclinations of the upper second molars.
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	==3D Printing of Rapid, Low-Cost and Patient-Specific Models of Brain Vasculature for Use in Preoperative Planning in Clipping of Intracranial Aneurysms==		==3D Printing of Rapid, Low-Cost and Patient-Specific Models of Brain Vasculature for Use in Preoperative Planning in Clipping of Intracranial Aneurysms==

← Older revision		Revision as of 22:06, 1 June 2022
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	Discussion: Our results generally validate the use of CT scans in studies of dental wear magnitude. Notwithstanding several caveats relating to CT scanning and visualization limitations should be considered to avoid over or under-estimation of dental wear.		Discussion: Our results generally validate the use of CT scans in studies of dental wear magnitude. Notwithstanding several caveats relating to CT scanning and visualization limitations should be considered to avoid over or under-estimation of dental wear.
−	\|}
−
−	~~==Comparison of Response Assessment in Veterinary Neuro-Oncology and Two Volumetric Neuroimaging Methods to Assess Therapeutic Brain Tumour Responses in Veterinary Patients==~~
−
−	~~{\| width="100%"~~
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−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/34792828 Vet Comp Oncol. 2021 Nov 18. PMID: 34792828]~~
−
−	~~'''Authors:''' Coppola G, Morris J, Gutierrez-Quintana R, Burnside S, José-López R.~~
−
−	~~'''Institution:''' School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.~~
−
−	'''Abstract:''' Standardized veterinary neuroimaging response assessment methods for brain tumours are lacking. Consequently, a response assessment in veterinary neuro-oncology (RAVNO) system which uses the sum product of orthogonal lesion diameters on 1-image section with the largest tumour area, has recently been proposed. In this retrospective study, 22 pre-treatment magnetic resonance imaging (MRI) studies from 18 dogs and four cats with suspected intracranial neoplasia were compared by a single observer to 32 post-treatment MRIs using the RAVNO system and two volumetric methods based on tumour margin or area delineation with HOROS and [http://www.slicer.org '''3D Slicer'''] software, respectively. Intra-observer variability was low, with no statistically significant differences in agreement index between methods (mean AI ± SD, 0.91 ± 0.06 for RAVNO; 0.86 ± 0.08 for HOROS; and 0.91 ± 0.05 for [http://www.slicer.org '''3D Slicer''']), indicating good reproducibility. Response assessments consisting of complete or partial responses, and stable or progressive disease, agreed in 23 out of 32 (72%) MRI evaluations using the three methods. The RAVNO system failed to identify changes in mass burden detected with volumetric methods in six cases. [http://www.slicer.org '''3D Slicer'''] differed from the other two methods in three cases involving cysts or necrotic tissue as it allowed for more accurate exclusion of these structures. The volumetric response assessment methods were more precise in determining changes in absolute tumour burden than RAVNO but were more time-consuming to use. Based on observed agreement between methods, low intra-observer variability and decreased time constraint, RAVNO might be a suitable response assessment method for the clinical setting.
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← Older revision		Revision as of 18:08, 1 June 2022
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	[http://www.slicer.org '''3D Slicer'''] software, v.4.10.2 was used for volumetric measurements.		[http://www.slicer.org '''3D Slicer'''] software, v.4.10.2 was used for volumetric measurements.
		+	\|}
		+
		+	==Radiomics Analysis Based on Lumbar Spine CT to Detect Osteoporosis==
		+
		+	{\| width="100%"
		+	\|
		+	'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/35494283 Arthrosc Sports Med Rehabil. 2021 Dec 7;4(2):e447-e452. PMID: 35494283.] \| [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042773/pdf/main.pdf PDF]
		+
		+	'''Authors:''' Di Loreto R, Getgood A, Degen R, Burkhart TA.
		+
		+	'''Institution:''' School of Kinesiology, Western University, London, Ontario, Canada.
		+
		+	'''Abstract:''' Purpose: The purpose of this study was to determine the optimal anchor placement and trajectory when repairing acetabular labral tears during hip arthroscopy with the primary focus on the 12 to 3 o'clock positions on the acetabular rim.
		+
		+	Methods: Three-dimensional computational models of the pelvis were generated from 13 cadaveric specimens using [http://www.slicer.org '''3D Slicer'''] medical imaging software. A set of cones, consistent with the dimensions of a commonly used sutured anchor, were virtually embedded into the models at the 12, 1, 2, and 3 o'clock positions around the acetabulum. Mirror images of the cone were extended toward the superficial aspect of the hip. The volume of bone occupied by the virtual anchor, the trajectory angle, and the volume of overlap between adjacent anchor locations were calculated.
		+
		+	Results: Bone volume was significantly greater at the 1 o'clock position (4196.2 [1190.2] mm3) compared with all other positions (P < .001). The 3 o'clock position had the smallest volume (629.2 [180.0] mm3) and was also significantly less than the 12 (P < .001) and 2 o'clock (P = .014) positions). The trajectory angle of 32.04 [5.05]°) at the 1 o'clock position was significantly greater compared with all other positions (P < .001). The least amount of adjacent position overlap occurred between the 2 and 3 o'clock positions (.12 [.42] mm3), and this was statistically smaller than the overlap between cones at the 12 and 1 o'clock positions (214.28 [251.88] mm3; P = .029) and the 1 and 2 o'clock positions (139.51 [177.14] mm3; P = .044).
		+
		+	Conclusions: Trajectory angles and the thickness of bone around the acetabulum were the greatest at the 12 to 1 o'clock positions, with the 1 o'clock position identified as that with the largest trajectory angle for safe anchor insertion.
		+
		+	Clinical relevance: The use of a single, workhorse portal, for anchor insertion may not be recommended and careful selection of a portal allowing a direct approach should be used for anterior anchor insertion.
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← Older revision		Revision as of 19:25, 27 April 2022
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−
−	~~==Volumetric Accuracy Analysis of Virtual Safety Barriers for Cooperative-Control Robotic Mastoidectomy==~~
−
−	~~{\| width="100%"~~
−	\|
−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/34325455 Otol Neurotol. 2021 Dec 1;42(10):e1513-e1517. PMID: 34325455]~~
−
−	~~'''Authors:''' Ding AS, Capostagno S, Razavi CR, Li Z, Taylor RH, Carey JP, Creighton FX.~~
−
−	~~'''Institution:''' Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.~~
−
−	~~'''Abstract:''' Hypothesis: Virtual fixtures can be enforced in cooperative-control robotic mastoidectomies with submillimeter accuracy.~~
−
−	Background: Otologic procedures are well-suited for robotic assistance due to consistent osseous landmarks. We have previously demonstrated the feasibility of cooperative-control robots (CCRs) for mastoidectomy. CCRs manipulate instruments simultaneously with the surgeon, allowing the surgeon to control instruments with robotic augmentation of motion. CCRs can also enforce virtual fixtures, which are safety barriers that prevent motion into undesired locations. Previous studies have validated the ability of CCRs to allow a novice surgeon to safely complete a cortical mastoidectomy. This study provides objective accuracy data for CCR-imposed safety barriers in cortical mastoidectomies.
−
−	Methods: Temporal bone phantoms were registered to a CCR using preoperative computed tomography (CT) imaging. Virtual fixtures were created using [http://www.slicer.org '''3D Slicer'''], with 2D planes placed along the external auditory canal, tegmen, and sigmoid, converging on the antrum. Five mastoidectomies were performed by a novice surgeon, moving the drill to the limit of the barriers. Postoperative CT scans were obtained, and Dice coefficients and Hausdorff distances were calculated.
−
−	Results: The average modified Hausdorff distance between drilled bone and the preplanned volume was 0.351 ± 0.093 mm. Compared with the preplanned volume of 0.947 cm3, the mean volume of bone removed was 1.045 cm<sup>3</sup> (difference of 0.0982 cm<sup>3</sup> or 10.36%), with an average Dice coefficient of 0.741 (range, 0.665-0.802).
−
−	~~Conclusions: CCR virtual fixtures can be enforced with a high degree of accuracy. Future studies will focus on improving accuracy and developing 3D fixtures around relevant surgical anatomy.~~
−	\|}

	==Utility of Machine Learning of Apparent Diffusion Coefficient (ADC) and T2-Weighted (T2W) Radiomic Features in PI-RADS Version 2.1 Category 3 Lesions to Predict Prostate Cancer Diagnosis==		==Utility of Machine Learning of Apparent Diffusion Coefficient (ADC) and T2-Weighted (T2W) Radiomic Features in PI-RADS Version 2.1 Category 3 Lesions to Predict Prostate Cancer Diagnosis==

← Older revision		Revision as of 18:40, 27 April 2022
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	Conclusion: The noninvasive CT-based nomogram, including radiomics signature and CT-determined T stage, could improve the accuracy of preoperative grading of ccRCC and provide individualized treatment for ccRCC patients.		Conclusion: The noninvasive CT-based nomogram, including radiomics signature and CT-determined T stage, could improve the accuracy of preoperative grading of ccRCC and provide individualized treatment for ccRCC patients.
−	\|}
−
−	~~==Volumetric Assessment of Changes in the Alveolar Ridge Dimension Following GBR Using a Combination FDBA With Collagen Membrane or Novel Resorbable Scaffold: A Prospective Two-Center Clinical Trial==~~
−
−	~~{\| width="100%"~~
−	\|
−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/34245016 J Periodontol. 2021 Jul 9. PMID: 34245016]~~
−
−	~~'''Authors:''' Dowlatshahi S, Chen CY, Zigdon-Giladi H, Horwitz J, Ahn C, Kim DM, Machtei EE.~~
−
−	~~'''Institution:''' Division of Periodontology, Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA.~~
−
−	'''Abstract:''' Background: The aim of this study was to examine osseous changes following lateral bone augmentation using a novel Ossix Volumax (OV) scaffold alone and compare it to combination therapy using freeze-dried bone allograft (FDBA) and resorbable collagen membrane (FDBA/CM).
−
−	Methods: Thirty patients completed this 9-months prospective two-center cohort clinical trial. Before surgery and 9-months re-entry, linear measurements were performed, and impressions taken. Cone-beam computed tomography (CBCT) were done at baseline and 9 months. DICOM slice data were converted into volumetric images using [http://www.slicer.org '''3D Slicer''']. Following 3D volumetric image construction, pre- and post-op Standard Triangle Language files were superimposed and volumetric data were extracted for a 10-mm region of interest. Linear measurements were compared similarly.
−
−	Results: Baseline clinical parameters were similar in both groups (4.22 and 4.53 mm for OV and FDBA/CM at -2 mm, respectively). Following treatment, vertical distance from the stent had changed minimally (-0.36 and -0.12 mm, respectively). Similarly, lateral bone gain ranged from 0 to 0.4 mm, for both groups. To the contrary, the CBCT measurements showed a significantly greater increase in horizontal width in the control at -2 mm (0.95 ± 0.2 mm) compared with -0.62 mm for the OV (P = 0.000). Similar changes were observed at -5 mm (0.63 and -0.41 mm, respectively, P = 0.01). Sites volume had increased from 266 ± 149 mm3 to 360 ± 138 mm3 (P = 0.001) for FDBA/CM with negligible changes for OV (from 334 to 335 mm3 , P = 0.952). these between-group changes being statistically significant (P = 0.023).
−
−	~~Conclusion: FDBA/CM yielded better albeit moderate increase in the volume of the edentulous ridge, while OV scaffolds failed to produce similar results.~~
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← Older revision		Revision as of 17:41, 27 April 2022
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	Discussion: Our results generally validate the use of CT scans in studies of dental wear magnitude. Notwithstanding several caveats relating to CT scanning and visualization limitations should be considered to avoid over or under-estimation of dental wear.		Discussion: Our results generally validate the use of CT scans in studies of dental wear magnitude. Notwithstanding several caveats relating to CT scanning and visualization limitations should be considered to avoid over or under-estimation of dental wear.
−	\|}
−
−	~~==Using Three-Dimensional Visualization as an Optimal Tool to Plan and Validate an Aortopexy in a Congenital Heart Disease Patient With Severe Tracheal Stenosis==~~
−
−	~~{\| width="100%"~~
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−	~~'''Publication:''' [https://www.ncbi.nlm.nih.gov/pubmed/34738096 Interact Cardiovasc Thorac Surg. 2021 Nov. PMID: 34738096]~~
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−	~~'''Authors:''' Kehl T, van Rüth V, Weinrich JM, Hübler M.~~
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−	~~'''Institution:''' Clinic for Children's Heart Medicine, University Heart & Vascular Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.~~
−
−	'''Abstract:''' We present a patient with severe tracheal stenosis resulting from a compression by the innominate artery 6 months after an arterial switch operation in a dextro-transposition of the great arteries. Segmentation and three-dimensional (3D) visualization were derived from a contrast-enhanced dual-source computed tomography and post-processing was performed using a dedicated open-source platform, [http://www.slicer.org '''3D Slicer''']. Post-processing allowed a comprehensible visualization of the relationship of the innominate artery to the trachea when compared to standard computer tomography reformations. Finally, the surgical approach to move the innominate artery anteriorly in order to relieve the tracheal obstruction was emphasized based on the improved 3D visualization of the actual pathology. An effective aortopexy could be performed and the postoperative result was confirmed by a second 3D visualization. About 3 months of follow-up, the patient is completely asymptomatic. Three-dimensional visualization offers excellent opportunities for diagnosis, treatment planning and follow-up in patients with a vascular-related tracheal stenosis in the context of congenital heart disease.
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 '''Abstract:''' The impact of surgical correction of cranial cruciate ligament rupture (CCLR) on 3D kinematics has not been thoroughly evaluated in dogs. The success of current techniques remains limited, as illustrated by suboptimal weightbearing and progression of osteoarthritis. The inability to restore the stifle's 3D kinematics might be a key element in understanding these suboptimal outcomes. The objective of this study was to evaluate the impact of lateral suture stabilization (LSS) on the 3D kinematics of the canine stifle joint. We hypothesized that LSS would not restore 3D kinematics in our model. Ten cadaveric pelvic limbs collected from large dogs (25-40 kg) were tested using a previously validated apparatus that simulates gait. Three experimental conditions were compared: (a) intact stifle; (b) unstable stifle following cranial cruciate ligament transection (CCLt) and (c) CCLt stabilized by LSS. Three-dimensional kinematics were collected through 5 loading cycles simulating the stance phase of gait and curves were analyzed using a Wilcoxon signed-rank test. LSS restored baseline kinematics for the entire stance phase for cranial and lateromedial translation, flexion, and abduction. It restored distraction over 90% of the stance phase. Internal rotation was limited, but not restored. This in vitro study had limitations, as it used a simplified model of stifle motion and weight-bearing. The results of this study report that LSS can restore physiologic 3D kinematics largely comparable to those of healthy stifles. Suboptimal outcome in patients following CCLR stabilization by LSS may therefore result from causes other than immediate postoperative abnormal 3D kinematics.
-All limbs were virtually reconstructed [http://www.slicer.org '''3D Slicer'''] v.4.10.2, and anatomical landmarks were used to define a joint coordinate system [12].
+All limbs were virtually reconstructed [http://www.slicer.org '''3D Slicer'''] v.4.10.2, and anatomical landmarks were used to define a joint coordinate system.
 |}