Abstract:
OBJECTIVES:An important measure for the diagnosis and monitoring of knee osteoarthritis is the minimum joint space width (mJSW). This requires accurate alignment of the x-ray beam with the tibial plateau, which may not be accomplished in practice. We investigate the feasibility of a new mJSW measurement method from stereo radiographs using 3D statistical shape models (SSM) and evaluate its sensitivity to changes in the mJSW and its robustness to variations in patient positioning and bone geometry. MATERIALS AND METHODS:A validation study was performed using five cadaver specimens. The actual mJSW was varied and images were acquired with variation in the cadaver positioning. For comparison purposes, the mJSW was also assessed from plain radiographs. To study the influence of SSM model accuracy, the 3D mJSW measurement was repeated with models from the actual bones, obtained from CT scans. RESULTS:The SSM-based measurement method was more robust (consistent output for a wide range of input data/consistent output under varying measurement circumstances) than the conventional 2D method, showing that the 3D reconstruction indeed reduces the influence of patient positioning. However, the SSM-based method showed comparable sensitivity to changes in the mJSW with respect to the conventional method. The CT-based measurement was more accurate than the SSM-based measurement (smallest detectable differences 0.55 mm versus 0. 82 mm, respectively). CONCLUSION:The proposed measurement method is not a substitute for the conventional 2D measurement due to limitations in the SSM model accuracy. However, further improvement of the model accuracy and optimisation technique can be obtained. Combined with the promising options for applications using quantitative information on bone morphology, SSM based 3D reconstructions of natural knees are attractive for further development.Cite this article: E. A. van IJsseldijk, E. R. Valstar, B. C. Stoel, R. G. H. H. Nelissen, N. Baka, R. van't Klooster, B. L. Kaptein. Three dimensional measurement of minimum joint space width in the knee from stereo radiographs using statistical shape models. Bone Joint Res 2016;320-327. DOI: 10.1302/2046-3758.58.2000626.
journal_name
Bone Joint Resjournal_title
Bone & joint researchauthors
van IJsseldijk EA,Valstar ER,Stoel BC,Nelissen RG,Baka N,Van't Klooster R,Kaptein BLdoi
10.1302/2046-3758.58.2000626subject
Has Abstractpub_date
2016-08-01 00:00:00pages
320-7issue
8issn
2046-3758pii
5/8/320journal_volume
5pub_type
杂志文章abstract:Objectives:The aim of this study was to analyze drain fluid, blood, and urine simultaneously to follow the long-term release of vancomycin from a biphasic ceramic carrier in major hip surgery. Our hypothesis was that there would be high local vancomycin concentrations during the first week with safe low systemic trough...
journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.82.BJR-2018-0174.R2
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abstract:OBJECTIVES:To assess the accuracy of patient-specific instruments (PSIs) versus standard manual technique and the precision of computer-assisted planning and PSI-guided osteotomies in pelvic tumour resection. METHODS:CT scans were obtained from five female cadaveric pelvises. Five osteotomies were designed using Mimic...
journal_title:Bone & joint research
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journal_title:Bone & joint research
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doi:10.1302/2046-3758.74.BJR-2017-0326
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doi:10.1302/2046-3758.22.2000137
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abstract:OBJECTIVES:As tumours of bone and soft tissue are rare, multicentre prospective collaboration is essential for meaningful research and evidence-based advances in patient care. The aim of this study was to identify barriers and facilitators encountered in large-scale collaborative research by orthopaedic oncological sur...
journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.65.BJR-2016-0192.R1
更新日期:2017-05-01 00:00:00
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更新日期:2019-11-02 00:00:00
abstract::The treatment of osteochondral lesions and osteoarthritis remains an ongoing clinical challenge in orthopaedics. This review examines the current research in the fields of cartilage regeneration, osteochondral defect treatment, and biological joint resurfacing, and reports on the results of clinical and pre-clinical s...
journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.29.2000189
更新日期:2013-09-16 00:00:00
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doi:10.1302/2046-3758.62.BJR-2016-0199.R1
更新日期:2017-02-01 00:00:00
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doi:10.1302/2046-3758.54.2000628
更新日期:2016-04-01 00:00:00
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更新日期:2020-05-16 00:00:00
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journal_title:Bone & joint research
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更新日期:2014-11-01 00:00:00
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journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.33.2000257
更新日期:2014-03-20 00:00:00
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journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.33.2000226
更新日期:2014-03-10 00:00:00
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更新日期:2020-08-02 00:00:00
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更新日期:2019-04-02 00:00:00
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更新日期:2020-11-01 00:00:00
abstract:OBJECTIVES:Pedicle-lengthening osteotomy is a novel surgery for lumbar spinal stenosis (LSS), which achieves substantial enlargement of the spinal canal by expansion of the bilateral pedicle osteotomy sites. Few studies have evaluated the impact of this new surgery on spinal canal volume (SCV) and neural foramen dimens...
journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.56.2000469
更新日期:2016-06-01 00:00:00
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journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.87.BJR-2018-0271.R1
更新日期:2019-08-02 00:00:00
abstract:OBJECTIVES:Small animal models of fracture repair primarily investigate indirect fracture healing via external callus formation. We present the first described rat model of direct fracture healing. METHODS:A rat tibial osteotomy was created and fixed with compression plating similar to that used in patients. The proce...
journal_title:Bone & joint research
pub_type: 杂志文章
doi:10.1302/2046-3758.111.2000087
更新日期:2012-11-01 00:00:00