The Relationship Between the Location of Uptake on Positron Emission Tomography/Computed Tomography and the Impingement Point by Computer Simulation in Femoroacetabular Impingement Syndrome With Cam Morphology

Oishi, Takayuki; Kobayashi, Naomi; Inaba, Yutaka; Choe, Han-Cheol; Tezuka, T.; So, KF; Kobayashi, Daigo; Saito, T.

doi:10.1016/j.arthro.2017.10.055

Cited by 5 publications

(5 citation statements)

References 32 publications

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“…21 Furthermore, another previous study revealed that in 82% of FAI cases with cam morphology, the SUV max region on PET/CT was in concordance with the impingement region by computer simulation. 13 Therefore, we presume that bony impingement induces repetitive mechanical stress and affects the bone remodeling status in subchondral bone in FAI cases and that 18 F-fluoride PET/CT can detect it and additionally provide precise anatomical information. In the current study, we divided the cases into cohorts according to SUV max ≥6 or <6.…”

Section: Discussionmentioning

confidence: 98%

“…Using this technique, the precise location of abnormal uptake in the femoral neck in FAI cases was previously clarified. 13 We speculated that posterior acetabular uptake on PET/CT may reflect a so-called “contrecoup region”, which has previously been described as a chondral injury in the posteroinferior acetabulum in pincer-type FAI cases. 8,9 The purpose of the present study was to evaluate posterior acetabular uptake on 18 F-fluoride PET/CT in patients with different types of FAI.…”

Section: Introductionmentioning

confidence: 94%

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Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Oishi

Kobayashi

Choe

et al. 2019

J Orthop Surg (Hong Kong)

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Background and purpose: The pathology of the posterior acetabular lesions, so-called “contrecoup regions”, in femorocacetabular impingement (FAI) has not been elucidated fully. 18F-fluoride positron emission tomography/computed tomography (PET/CT) can visualize abnormal uptake caused by impingement. Therefore, we aimed to evaluate posterior acetabular uptake on PET/CT in FAI patients. Patients and methods: Patients with FAI who underwent 18F-fluoride PET/CT between October 2014 and October 2016 were retrospectively evaluated. The maximum standardized uptake value (SUVmax) in the posterior acetabulum was evaluated. The mean SUVmax of FAI with cam morphology (the cam group) was compared with that of FAI with pincer morphology (the pincer group). In addition, the numbers of cases with SUVmax ≥ 6 and SUVmax < 6 in each group were evaluated. The entire study cohort was also grouped according to SUVmax, and the mean α and center edge angles were evaluated. Results: In total, 41 hips were analyzed (34 hips in the cam group and 7 in the pincer group). The mean SUVmax of the cam group (11.2 ± 7.4) was significantly higher than that of the pincer group (4.9 ± 1.9) ( p < 0.01). The incidence of cases with SUVmax ≥ 6 in the cam group was significantly high ( p < 0.01). In the overall cohort, the mean α angle of the SUVmax ≥ 6 group was significantly higher than that of the SUVmax < 6 group ( p < 0.01). Conclusion: Evaluation of posterior acetabular uptake suggests an association between cam morphology and increased posterior acetabular uptake.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 94%

Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Oishi

Kobayashi

Choe

et al. 2019

J Orthop Surg (Hong Kong)

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“…A previous study suggested that MIR impingement in FAI with cam morphology may be more common at 70 of flexion than at 90 . 23 We often need to flex the hip joint by >90 , for example, when standing up from the floor or a chair and putting on/taking off shoes. 14 Thus, the hip joint must adopt different positions during occupational or sporting activities.…”

Section: Discussionmentioning

confidence: 99%

Effect of 3-Dimensional Versus Single-Plane Changes in Pelvic Dynamics on Range of Motion in Hips With Femoroacetabular Impingement: A Computer Simulation Analysis

Honda

Kobayashi

Kamono

et al. 2022

Orthopaedic Journal of Sports Medicine

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Background: Femoroacetabular impingement (FAI) is primarily caused by bony impingement between the acetabulum and femoral neck during hip motion. Increasing posterior pelvic tilt improves hip range of motion in patients with FAI. Purpose: To use computer simulation analysis to compare the effects of 3-dimensional (3D) changes in pelvic tilt (sagittal tilt [St], axial rotation, and coronal tilt) with changes in a single plane (St), with the aim of improving range of motion in patients with FAI. Study Design: Controlled laboratory study. Methods: We evaluated 43 patients with FAI treated by arthroscopic cam resection. A 3D simulation was used to construct the following pelvic models: a 5° and 10° increase posteriorly in St (St5° and St10°) and a combined 5° change in St, axial rotation, and coronal tilt (Complex5°) from the baseline of the anterior pelvic plane. Improvements in maximum internal rotation (MIR) at 45°, 70°, and 90° of hip flexion and improvements in maximum flexion with no internal rotation were compared among the St5°, St10°, and Complex5° models. The pelvic models of each single-plane change of 5° and 10° were evaluated in the same simulation. Results: At 90° and 70°, there was a significant difference between the Complex5° and St10° models with respect to improvement in MIR ( P = .004 at 90° of flexion; P = .017 at 70° of flexion). There was no significant difference in MIR at 45° of flexion ( P = .71) or in maximum flexion ( P = .42). Conclusion: At 70° and 90° of hip flexion, a combined change in 3D pelvic alignment of 5° (ie, St, axial rotation, and coronal tilt) was more effective in improving hip MIR than a 10° change in St only. Clinical Relevance: Effective physical therapy for FAI should address pelvic motion in all 3 planes rather than in a single plane.

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“…In a previous study by Oishi et al [3], impingement simulation was applied and compared with the abnormal uptake point by positron emission tomography. This study showed that impingement may occur more frequently at <90° flexion in patients with FAI syndrome with cam morphology.…”

Section: Identification Of Impingement Pointsmentioning

confidence: 99%

The Practice of Computer-Assisted Planning and Navigation for Hip Arthroscopy

Kobayashi¹,

Higashihira²,

Inaba³

2020

Essentials in Hip and Ankle

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Despite significant developments in hip arthroscopic surgery in recent years, precise preoperative planning and accurate performance remain challenging. Preoperative planning is particularly important in cases of osteochondroplasty for cam-type femoroacetabular impingement (FAI), and can be aided by several computer-assisted tools, including three-dimensional imaging analysis or kinematic analysis. Initially, the exact point of the bony impingement is identified using simulation analysis; then, virtual osteochondroplasty is performed. Improvements in the range of motion can then be evaluated using computer simulation again. In this way, the required area and depth of bone resection can be assessed preoperatively. In addition, computed tomography-based navigation assistance can be used to complete the osteochondroplasty in accordance with the preoperative planning. After surgery, postoperative evaluation provides valuable feedback to improve future planning and procedures. In this chapter, we describe the practice of computer-assisted planning and navigation for hip arthroscopy.

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The Relationship Between the Location of Uptake on Positron Emission Tomography/Computed Tomography and the Impingement Point by Computer Simulation in Femoroacetabular Impingement Syndrome With Cam Morphology

Cited by 5 publications

References 32 publications

Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Effect of 3-Dimensional Versus Single-Plane Changes in Pelvic Dynamics on Range of Motion in Hips With Femoroacetabular Impingement: A Computer Simulation Analysis

The Practice of Computer-Assisted Planning and Navigation for Hip Arthroscopy

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The Relationship Between the Location of Uptake on Positron Emission Tomography/Computed Tomography and the Impingement Point by Computer Simulation in Femoroacetabular Impingement Syndrome With Cam Morphology

Cited by 5 publications

References 32 publications

Posterior acetabular uptake on 18F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Posterior acetabular uptake on 18F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Effect of 3-Dimensional Versus Single-Plane Changes in Pelvic Dynamics on Range of Motion in Hips With Femoroacetabular Impingement: A Computer Simulation Analysis

The Practice of Computer-Assisted Planning and Navigation for Hip Arthroscopy

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Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement

Posterior acetabular uptake on ¹⁸F-fluoride positron emission tomography/computed tomography reveals a putative contrecoup region in patients with femoroacetabular impingement