Computer-Assisted Volumetric Analysis and Quantitatively Anophthalmic Orbit Reconstruction With Dorsalis Pedis Flap and Bone Graft

Objective: Comparison between bovine-derived demineralized bone matrix (DMBM) and iliac crest graft over long term for secondary alveolar bone grafting (SABG) in patients with unilateral cleft lip and palate (UCLP) in terms of radiological and clinical outcomes. Design: Prospective, randomized, parallel groups, double-blind, controlled trial. Setting: Unit of Oral and Maxillofacial Surgery, Oral Health Science Centre, Postgraduate Institute of Medical Education & Research, Chandigarh. Participants: Twenty patients with UCLP. Interventions: Patients were allocated into group I (Iliac crest bone graft) and group II (DMBM) for SABG. Outcomes were assessed at 2 weeks, 6 months, and then after mean follow-up period of 63 months. Outcomes Measures: Volumetric analysis of the grafted bone in the alveolar cleft site was done through cone beam computed tomography using Cavalieri principle and modified assessment tool. Clinical assessment was performed in terms of pain, swelling, duration of hospital stay, cost of surgery, alar base symmetry, and donor site morbidity associated with iliac crest harvesting. Results: Volumetric analysis through Cavalieri principle revealed comparable bone uptake at follow-up of 6 months between group I (70%) and group II (69%). Modified assessment tool showed no significant difference between horizontal and vertical bone scores over short- and long-term follow-up. In group II, there was higher cost of surgery, but no donor site morbidity unlike group I. Conclusions: Demineralized bone matrix proved analogous to iliac crest bone graft as per volumetric analysis over shorter period. However, although statistically insignificant, net bone volume achieved was lower than the iliac crest graft at longer follow-up.

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3D Volumetric Analysis and Anatomical Considerations for Sinus Bone Graft

Applied Sciences ◽

10.3390/app11030951 ◽

2021 ◽

Vol 11 (3) ◽

pp. 951

Author(s):

Ji Hyoung Kim ◽

Hyo Joon Kim ◽

Ye Joon Jo ◽

Jun Seok Choi ◽

Seong Yong Moon

Keyword(s):

Bone Graft ◽

Maxillary Sinus ◽

Alveolar Bone ◽

Lateral Wall ◽

Volumetric Analysis ◽

Ct Scans ◽

Sinus Floor Elevation ◽

Sinus Wall ◽

Sinus Floor ◽

The Mean

The aim of this study is to evaluate anatomical considerations and assess the volume of the maxillary sinus bone graft. There were sixty-three patients (eighty-three sinuses) who had taken CT scans for implant surgery. Patients included those whose height of the residual alveolar bone was less than 5 mm. The position of posterior superior alveolar artery, the thickness of the maxillary sinus wall, and the volume of the maxillary sinus according to the amount of sinus floor elevation were measured. The mean vertical distance of posterior superior alveolar artery was 11.91 ± 4.79 mm from 3.03 mm to 24.05 mm. The mean thickness of the lateral wall was 1.71 ± 0.55 mm in the range of 0.74 mm to 3.93 mm. The volume of 3 mm, 5 mm, 7 mm, and 10 mm from the sinus floor was 0.173 ± 0.11 cm3, 0.526 ± 0.25 cm3, 1.068 ± 0.43 cm3, and 2.184 ± 0.74 cm3 on average, respectively. The knowledge of the posterior superior alveolar artery position, the lateral wall thickness, and the volume of the maxillary sinus can help the clinician for sinus bone graft.

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Volume-dependent overestimation of spontaneous intracerebral hematoma volume by the ABC/2 formula

Acta Radiologica ◽

10.1080/02841850802647039 ◽

2009 ◽

Vol 50 (3) ◽

pp. 306-311 ◽

Cited By ~ 31

Author(s):

Chih-Wei Wang ◽

Chun-Jung Juan ◽

Yi-Jui Liu ◽

Hsian-He Hsu ◽

Hua-Shan Liu ◽

...

Keyword(s):

Estimation Error ◽

Positive Association ◽

Volumetric Analysis ◽

Intracerebral Hematoma ◽

Computer Assisted ◽

Hematoma Volume ◽

Computed Tomography Scans ◽

Group 3 ◽

The Mean ◽

Group 2

Background: Although the ABC/2 formula has been widely used to estimate the volume of intracerebral hematoma (ICH), the formula tends to overestimate hematoma volume. The volume-related imprecision of the ABC/2 formula has not been documented quantitatively. Purpose: To investigate the volume-dependent overestimation of the ABC/2 formula by comparing it with computer-assisted volumetric analysis (CAVA). Material and Methods: Forty patients who had suffered spontaneous ICH and who had undergone non-enhanced brain computed tomography scans were enrolled in this study. The ICH volume was estimated based on the ABC/2 formula and also calculated by CAVA. Based on the ICH volume calculated by the CAVA method, the patients were divided into three groups: group 1 consisted of 17 patients with an ICH volume of less than 20 ml; group 2 comprised 13 patients with an ICH volume of 20 to 40 ml; and group 3 was composed of 10 patients with an ICH volume larger than 40 ml. Results: The mean estimated hematoma volume was 43.6 ml when using the ABC/2 formula, compared with 33.8 ml when using the CAVA method. The mean estimated difference was 1.3 ml, 4.4 ml, and 31.4 ml for groups 1, 2, and 3, respectively, corresponding to an estimation error of 9.9%, 16.7%, and 37.1% by the ABC/2 formula ( P<0.05). Conclusion: The ABC/2 formula significantly overestimates the volume of ICH. A positive association between the estimation error and the volume of ICH is demonstrated.

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Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

Seminars in Musculoskeletal Radiology ◽

10.1055/s-0039-1678729 ◽

2019 ◽

Vol 23 (03) ◽

pp. 227-251 ◽

Cited By ~ 5

Author(s):

Florian Schmaranzer ◽

Luis Cerezal ◽

Eva Llopis

Keyword(s):

Magnetic Resonance ◽

Sports Injuries ◽

Imaging Techniques ◽

Three Dimensional ◽

Pain Syndrome ◽

Volumetric Analysis ◽

Computer Assisted ◽

Current Standard ◽

Increasing Demand ◽

Magnetic Resonance Imaging Mri

AbstractOver the last 2 decades, the definition of pathomechanical concepts that link osseous deformities to chondrolabral damage and expose young and active patients to the risk of early osteoarthritis has led to a tremendous increase in the number of joint-preserving surgeries performed. The rise in arthroscopic procedures has led to an increasing demand for comprehensive preoperative magnetic resonance imaging (MRI) assessment of the hip joint. This includes conventional MRI for the assessment of extra-articular and periarticular pathologies such as greater trochanteric pain, deep gluteal pain syndrome, and sports injuries. Magnetic resonance arthrography with or without traction is reserved for the accurate evaluation of deformities associated with impingement and hip instability and for detecting the resulting intra-articular lesions. This article summarizes the current standard imaging techniques that the radiologist should know. It also explores the potential of computer-assisted analysis of three-dimensional MRI for virtual impingement simulation and volumetric analysis of cartilage composition and geometry.

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AUTOMATED VOLUMETRY OF POSTOPERATIVE SKULL DEFECT ON BRAIN CT

Biomedical Engineering Applications Basis and Communications ◽

10.4015/s1016237213500336 ◽

2013 ◽

Vol 25 (03) ◽

pp. 1350033 ◽

Cited By ~ 2

Author(s):

Ke-Chun Huang ◽

Chun-Chih Liao ◽

Furen Xiao ◽

Charles Chih-Ho Liu ◽

I-Jen Chiang ◽

...

Keyword(s):

Sagittal Plane ◽

Symmetry Plane ◽

Correlation Coefficients ◽

Volumetric Analysis ◽

Ct Images ◽

Computer Assisted ◽

Global Symmetry ◽

Skull Defect ◽

Defect Volume ◽

Northern Taiwan

The volume of the skull defect should be one of the most important quantitative measures for decompressive craniectomy. However, there has been no study focusing on automated estimation of the volume from postoperative computed tomography (CT). This study develops and validates three methods that can automatically locate, recover and measure the missing skull region based on symmetry without preoperative images. The low resolution estimate (LRE) method involves downsizing CT images, finding the axis of symmetry for each slice, and estimating the location and size of the missing skull regions. The intact mid-sagittal plane (iMSP) can be defined either by dimension-by-dimension (DBD) method as a global symmetry plane or by Liu's method as a regression from each slices. The skull defect volume can then be calculated by skull volume difference (SVD) with respect to each iMSP. During a 48-month period between July 2006 and June 2010 at a regional hospital in northern Taiwan, we collected 30 sets of nonvolumetric CT images after craniectomies. Three board-certified neurosurgeons perform computer-assisted volumetric analysis of skull defect volume V Man as the gold standard for evaluating the performance of our algorithm. We compare the error of the three volumetry methods. The error of V LRE is smaller than that of V Liu (p < 0.0001) and V DBD (p = 0.034). The error of V DBD is significant smaller than that of V Liu (p = 0.001). The correlation coefficients between V Man and V LRE , V Liu , V DBD are 0.98, 0.88 and 0.95, respectively. In conclusion, these methods can help to define the skull defect volume in postoperative images and provide information of the immediate volume gain after decompressive craniectomies. The iMSP of the postoperative skull can be reliably identified using the DBD method.

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Computer-Assisted Volumetric Analysis Compared With ABC/2 Method for Assessing Warfarin-Related Intracranial Hemorrhage Volumes

Neurocritical Care ◽

10.1007/s12028-008-9089-4 ◽

2008 ◽

Vol 9 (3) ◽

pp. 307-312 ◽

Cited By ~ 34

Author(s):

William D. Freeman ◽

Kevin M. Barrett ◽

Joseph M. Bestic ◽

James F. Meschia ◽

Daniel F. Broderick ◽

...

Keyword(s):

Intracranial Hemorrhage ◽

Volumetric Analysis ◽

Computer Assisted

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Comparison of the ABC/2 Estimation Technique to Computer-Assisted Volumetric Analysis of Intraparenchymal and Subdural Hematomas Complicating the GUSTO-1 Trial

Stroke ◽

10.1161/01.str.29.9.1799 ◽

1998 ◽

Vol 29 (9) ◽

pp. 1799-1801 ◽

Cited By ~ 138

Author(s):

James M. Gebel ◽

Cathy A. Sila ◽

Michael A. Sloan ◽

Christopher B. Granger ◽

Joseph P. Weisenberger ◽

...

Keyword(s):

Volumetric Analysis ◽

Computer Assisted ◽

Estimation Technique ◽

Subdural Hematomas

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Evaluation of computer-assisted mandibular reconstruction with vascularized iliac crest bone graft compared to conventional surgery: a randomized prospective clinical trial

Trials ◽

10.1186/1745-6215-15-114 ◽

2014 ◽

Vol 15 (1) ◽

pp. 114 ◽

Cited By ~ 52

Author(s):

Nassim Ayoub ◽

Alireza Ghassemi ◽

Majeed Rana ◽

Marcus Gerressen ◽

Dieter Riediger ◽

...

Keyword(s):

Clinical Trial ◽

Bone Graft ◽

Iliac Crest ◽

Mandibular Reconstruction ◽

Prospective Clinical Trial ◽

Iliac Crest Bone Graft ◽

Computer Assisted ◽

Conventional Surgery

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Computer-Assisted Three-Dimensional Corrective Osteotomy for Malunited Fractures of the Distal Radius Using Prefabricated Bone Graft Substitute

The Journal of Hand Surgery (Asian-Pacific Volume) ◽

10.1142/s2424835518500467 ◽

2018 ◽

Vol 23 (04) ◽

pp. 479-486 ◽

Cited By ~ 7

Author(s):

Kosuke Shintani ◽

Kenichi Kazuki ◽

Masahiro Yoneda ◽

Takuya Uemura ◽

Mitsuhiro Okada ◽

...

Keyword(s):

Bone Graft ◽

Distal Radius ◽

Corrective Osteotomy ◽

Three Dimensional ◽

Bone Graft Substitute ◽

Computer Assisted ◽

Mayo Wrist Score ◽

Sound Side ◽

Ct Data

Background: Three-dimensional computed tomography (3D-CT) imaging has enabled more accurate preoperative planning. The purpose of this study was to investigate the results of a novel, computer-assisted, 3D corrective osteotomy using prefabricated bone graft substitute to treat malunited fractures of the distal radius. Methods: We investigated 19 patients who underwent the computer-assisted 3D corrective osteotomy for a malunited fracture of the distal radius after the operation was stimulated with CT data. A prefabricated bone graft substitute corresponding to the patient’s bone defect was implanted and internal fixation was performed using a plate and screws. We compared postoperative radiographic parameters of the patient’s operated side with their sound side and analyzed clinical outcomes using Mayo wrist score. Results: All patients achieved bone union on X-ray imaging at final follow-up. The mean differences of palmar tilt, radial inclination and ulnar variance between the operation side and the sound side were 4.3°, 2.3° and 1.2 mm, respectively. The Mayo wrist score was fair in 4 patients and poor in 15 patients before surgery. At the final follow-up after surgery, the scores improved to excellent in 3 patients, good in 11 patients and fair in 5 patients. There were two patients with correction loss at the final follow-up, but no patient complained of hand joint pain. Conclusions: We believe that computer-assisted 3D corrective osteotomy using prefabricated bone graft substitute achieved good results because it worked as a guide to the accurate angle.

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