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Articles on Photogrammetry
New method of scoliosis assessment: preliminary results using computerized photogrammetry.
A new method for nonradiographic evaluation of scoliosis was independently compared with the Cobb radiographic method, for the quantification of scoliotic curvature. To develop a protocol for computerized photogrammetry, as a nonradiographic method, for the quantifica...
Head and trunk segment moments of inertia estimation using angular momentum technique: validity and sensitivity analysis.
I values and test its validity and sensitivity. Twenty-three adults who participated in this study were divided into three morphological groups according to their body mass index (BMI). Using the proposed technique, the HT's I values were estimated for the whole sample and compared to three well-kno...
Computer-aided methods in bespoke breast prosthesis design and fabrication.
This case study presents a method of utilizing computer-aided design technologies to provide bespoke, external breast prostheses. The technique is illustrated through a case study of a mastectomy patient. Photogrammetry methods were used to capture the breast form when supported by a...
The effect of axial and oblique loading on the micromovement of dental implants.
Bone density influenced implant displacement. The loading character (axial versus oblique) significantly influenced implant displacement in soft cancellous bone block specimens only. However, the limitation of the measured displacement values to an in vitro application that did not represent the com...
Stereo image-based arm tracking for in vivo surgical robotics.
Motor-based tracking and image-based tracking are considered for three-dimensional in vivo tracking of the arms of a surgical robot during minimally invasive surgery. Accurate tracking is necessary for tele-medical applications and for the future automation of surgical procedures. An...
The role of three-dimensional scanning technique in evaluation of breast asymmetry in breast augmentation: a 100-case study.
Three-dimensional scanning offers new opportunities to enable objective and quantitative analysis of the breast. The authors introduce an innovative method of performing a thorough analysis of breast asymmetry by means of three-dimensional scanning. One hundred breast augmentation patients underwent...
Stereo matching with Mumford-Shah regularization and occlusion handling.
We suggest a novel spatially continuous approach for stereo matching based on the variational framework. The proposed method suggests a unique regularization term based on Mumford-Shah functional for discontinuity preserving, combined with a new energy functional for occlusion handling. The evaluati...
Comparison of facial soft tissue measurements on three-dimensional images and models obtained with different methods.
The aim of this study was to compare the clinical facial soft tissue measurements with the measurements of facial plaster cast, three-dimensional scanned facial plaster cast, 3-dimensional digital photogrammetrical images, and three-dimensional laser scanner images. Three-dimensional facial images o...
Can hip and knee kinematics be improved by eliminating thigh markers?
Marker sets developed for gait analysis are often applied to more dynamic tasks with little or no validation, despite known complications of soft tissue artifact. This study presents a comparison of hip and knee kinematics as calculated by five concurrently-worn tracking marker sets during eight dif...
Reproducibility of rasterstereography for kyphotic and lordotic angles, trunk length, and trunk inclination: a reliability study.
Cronbach alpha for the intratester-reliability of the kyphotic angle ICT-ITL (max.) for the 3 investigators has values between 0.921 and 0.992. The intertester-reliability for the same parameter is 0.979 (95% CI). In this study group a meaningful association between body mass index and reliability o...