On a “Columbus’ Egg”: Modeling the shape of asymptomatic, dysplastic and impinged hip joints

Lopes, Daniel Simões; Pires, Sara M.; Mascarenhas, Vasco; Silva, Miguel T.; Jorge, Joaquim

doi:10.1016/j.medengphy.2018.07.001

Cited by 5 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 16 However, the nonselective visualization of bone on common MR images complicates both bone modeling and the measurement of diagnostic parameters as extra care needs to be taken to discriminate bone from soft tissues such as the labrum 13 or ligaments. 17 CT has traditionally been the modality of choice for the assessment of osseous structures, enabling 3D bone visualization for diagnostic purposes 18 and for a range of motion analysis 5 , 19 with bone models generated faster than with MR images. 20 However, CT imaging introduces an adverse radiation burden, 11 especially for younger populations.…”

Section: Introductionmentioning

confidence: 99%

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Florkow

Willemsen

Zijlstra

et al. 2021

Journal Orthopaedic Research

View full text Add to dashboard Cite

This study evaluated the accuracy of synthetic computed tomography (sCT), as compared to CT, for the 3D assessment of the hip morphology. Thirty male patients with asymptomatic hips, referred for magnetic resonance (MR) imaging and CT, were included in this retrospective study. sCT images were generated from threedimensional radiofrequency-spoiled T1-weighted multi-echo gradient-echo MR images using a commercially available deep learning-enabled software and were compared with CT images through mean error and surface distance computation and by means of eight clinical morphometric parameters relevant for hip care.Parameters included center-edge angle (CEA), sharp angle, acetabular index, extrusion index, femoral head center-to-midline distance, acetabular version (AV), and anterior and posterior acetabular sector angles. They were measured by two senior orthopedic surgeons and a radiologist in-training on CT and sCT images. The reliability and agreement of CT-and sCT-based measurements were assessed using intraclass correlation coefficients (ICCs) for absolute agreement, Bland-Altman plots, and two one-sided tests for equivalence. The surface distance between CTand sCT-based bone models were on average submillimeter. CT-and sCT-based measurements showed moderate to excellent interobserver and intraobserver correlation (0.56 < ICC < 0.99). In particular, the inter/intraobserver agreements were good for AV (ICC > 0.75). For CEA, the intraobserver agreement was good (ICC > 0.75) and the interobserver agreement was moderate (ICC > 0.69). Limits of agreements were similar between intraobserver CT and intermodal measurements.All measurements were found statistically equivalent, with average intermodal differences within the intraobserver limits of agreement. In conclusion, sCT and CT were equivalent for the assessment of the hip joint bone morphology.

show abstract

Section: Introductionmentioning

confidence: 99%

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Florkow

Willemsen

Zijlstra

et al. 2021

Journal Orthopaedic Research

View full text Add to dashboard Cite

show abstract

“…CT/MR images can be used to create shape models, compare, and quantify differences in bone or cortical thickness between patients with cam deformity and controls [45]. Anatomical differences and identification of ideal shape can be assessed using correspondence-based computing methods such as statistical shape modeling [14,18].…”

Section: Quantitative Osseous Assessmentmentioning

confidence: 99%

Advances in FAI Imaging: a Focused Review

Mascarenhas

Caetano

Dantas

et al. 2020

Curr Rev Musculoskelet Med

Self Cite

View full text Add to dashboard Cite

Purpose of Review Femoroacetabular impingement (FAI) is one of the main causes of hip pain in young adults and poses clinical challenges which have placed it at the forefront of imaging and orthopedics. Diagnostic hip imaging has dramatically changed in the past years, with the arrival of new imaging techniques and the development of magnetic resonance imaging (MRI). This article reviews the current state-of-the-art clinical routine of individuals with suspected FAI, limitations, and future directions that show promise in the field of musculoskeletal research and are likely to reshape hip imaging in the coming years. Recent Findings The largely unknown natural disease course, especially in hips with FAI syndrome and those with asymptomatic abnormal morphologies, continues to be a problem as far as diagnosis, treatment, and prognosis are concerned. There has been a paradigm shift in recent years from bone and soft tissue morphological analysis towards the tentative development of quantitative approaches, biochemical cartilage evaluation, dynamic assessment techniques and, finally, integration of artificial intelligence (AI)/deep learning systems. Summary Imaging, AI, and hip preserving care will continue to evolve with new problems and greater challenges. The increasing number of analytic parameters describing the hip joint, as well as new sophisticated MRI and imaging analysis, have carried practitioners beyond simplistic classifications. Reliable evidence-based guidelines, beyond differentiation into pure instability or impingement, are paramount to refine the diagnostic algorithm and define treatment indications and prognosis. Nevertheless, the boundaries of morphological, functional, and AI-aided hip assessment are gradually being pushed to new frontiers as the role of musculoskeletal imaging is rapidly evolving.

show abstract

“…Research aimed at developing the necessary protocol to integrate advanced modeling (e.g., statistical shape modeling) into clinical practice is valuable because it could aid in assessing young pre-arthritic patients. 41 With regard to clinical outcomes, future research is needed to determine if adding advanced 3D hip imaging for presurgical planning would, in fact, improve therapeutical outcomes for young patients.…”

Section: Mri Protocol For the Young Hip Patientmentioning

confidence: 99%

Imaging Methodology for Hip Preservation: Techniques, Parameters, and Thresholds

Mascarenhas

Ayeni

Egund

et al. 2019

Semin Musculoskelet Radiol

Self Cite

View full text Add to dashboard Cite

The concept of hip impingement and hip-preserving surgery has been appreciated in more detail since 2001 when a new surgical approach was reported and a hypothesis linking femoroacetabular impingement (FAI) with osteoarthritis was presented. Paralleling the introduction of hip arthroscopy, these events led to an increasing interest in the hip, and the number of publications has risen rapidly over the past 15 years, despite limited evidence levels and inconsistent methodology. Accordingly, etiology, diagnosis, prognosis, and the effects of treatment for FAI are still elusive due to a number of uncertainties and a lack of clear diagnostic criteria.Future research must focus on developing high-quality scientific studies, so thorough and reproducible methodology is needed. This review provides researchers, radiologists, and clinicians with a comprehensive approach to hip imaging with a focus on strategies to help guide the clinical diagnosis. Using evidence from current literature and knowledge from experienced clinicians, some of the imaging methodology challenges are deciphered.

show abstract

On a “Columbus’ Egg”: Modeling the shape of asymptomatic, dysplastic and impinged hip joints

Cited by 5 publications

References 29 publications

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

MRI‐based synthetic CT shows equivalence to conventional CT for the morphological assessment of the hip joint

Advances in FAI Imaging: a Focused Review

Imaging Methodology for Hip Preservation: Techniques, Parameters, and Thresholds

Contact Info

Product

Resources

About