Background:Autologous fat grafting has gained popularity in breast augmentation.Various methods can be used to estimate the volume retention rate.This systematic review aimed to establish whether the type of method us...Background:Autologous fat grafting has gained popularity in breast augmentation.Various methods can be used to estimate the volume retention rate.This systematic review aimed to establish whether the type of method used for measuring breast volume is a factor that influences the reported volume retention rate.Methods:Studies were identified using the electronic databases PubMed,Embase,Cochrane Central Register of Controlled Trials,and Web of Science from inception of the database up to February 2019.Articles describing autologous fat grafting for breast augmentation were selected based on pre-determined inclusion and exclusion criteria.The characteristics of the included studies were summarized,and the reported volume retention rate from the studies was compared.A quality assessment of all included articles was performed using the methodological index for non-randomized studies criteria.Results:A total of 618 articles were identified,of which 12 studies,with a total of 1337 cases,were eligible.The retention rate of injected adipose tissue varied when the method of fat grafting and volume analysis used were both the same,as well as when the method of fat grafting was the same but the method of volumetric evaluation used was different.Conclusions:Currently,the tools available for estimating the volume retention rate come with limitations.In order to objectively evaluate the percentage of graft retention,a standard protocol that applies to the different methods should be established in the future.展开更多
AIM:To evaluate the value of parameters on CT scan in predicting dysthyroid optic neuropathy(DON)and to provide guidance for early diagnosis of DON accordingly.METHODS:A total of 67 eyes of 35 patients with thyroid-as...AIM:To evaluate the value of parameters on CT scan in predicting dysthyroid optic neuropathy(DON)and to provide guidance for early diagnosis of DON accordingly.METHODS:A total of 67 eyes of 35 patients with thyroid-associated ophthalmopathy(TAO)were included in this study.Patients were divided into 2 groups(DON group and non-DON group).Parameters were measured on high resolution CT,including muscle index(MI),superior ophthalmic vein(SOV)dilatation,extraocular muscle volume/orbit volume(MV/OV),and intracranial fat prolapsed,and be compared between these 2 groups.The relation between those parameters and visual function[visual acuity(VA)and visual field defect(VF defect)]were also evaluated.RESULTS:MI and MV/OV were significantly higher in DON group(P=0.00035 and P=0.00026).No significant difference was detected regarding intracranial fat prolapse existence and SOV dilatation(P=0.37 and P=0.15).MV/OV was found to have significant negative correlation with both VF defect(R=-0.332,P=0.0273)and VA(R=-0.635,P=0.00)while MI was found to have negative linear correlation with VA only(R=-0.456,P=0.00017).The area under receiver operating characteristic curves was 0.82 for MV/OV and 0.75 for MI.The best performance in detecting DON was achieved when MV/OV is set at 0.20 with 72%sensitivity and 87%specificity and MI is set at 0.52 with 64%sensitivity and 80%specificity.CONCLUSION:MI and MV/OV are predictive parameters for DON.Together with clinical manifestations,MV/OV≥0.2 can be used as a good indicator for DON in TAO patients.展开更多
AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity(ASD) with magnetic resonance imaging(MRI) and 3D reconstructions.METHODS: Nineteen female ASD patients(mean age 60 ...AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity(ASD) with magnetic resonance imaging(MRI) and 3D reconstructions.METHODS: Nineteen female ASD patients(mean age 60 ± 13) were included prospectively and consecutively and had T1-weighted Turbo Spin Echo sequence MRIs with Dixon method from the proximal tibia up to T12 vertebra. The Dixon method permitted to evaluate the proportion of fat inside each muscle(fat-water ratio). In order to investigate the accuracy of the Dixon method for estimating fat vs water, the same MRI acquisition was performed on phantoms of four vials composed of different proportion of fat vs water. With Muscl'X software, 3D reconstructions of 17 muscles or group of muscles were obtained identifying the muscle's contour on a limited number of axial images [Deformation of parametric specific objects(DPSO) Method]. Musclar volume(Vmuscle), infiltrated fat volume(Vfat) and percentage of fat infiltration [Pfat, calculated as follow: Pfat = 100 ×(Vfat/Vmuscle)] were characterized by extensor or flexor function respectively for the spine, hip and knee and theirs relationship with demographic data were investigated. RESULTS: Phantom acquisition demonstrated a non linear relation between Dixon fat-water ratio and the real fat-water ratio. In order to correct the Dixon fatwater ratio, the non linear relation was approximated with a polynomial function of degree three using the phantom acquisition. On average, Pfat was 13.3% ± 5.3%. Muscles from the spinal extensor group had a Pfat significantly greater than the other muscles groups, and the largest variability(Pfat = 31.9% ± 13.8%, P < 0.001). Muscles from the hip extensor group ranked 2nd in terms of Pfat(14% ± 8%), and were significantly greater than those of the knee extensor(P = 0.030). Muscles from the knee extensor group demonstrated the least Pfat(12% ± 8%). They were also the only group with a significant correlation between Vmuscle and Pfat(r =-0.741, P < 0.001), however this correlation 展开更多
文摘Background:Autologous fat grafting has gained popularity in breast augmentation.Various methods can be used to estimate the volume retention rate.This systematic review aimed to establish whether the type of method used for measuring breast volume is a factor that influences the reported volume retention rate.Methods:Studies were identified using the electronic databases PubMed,Embase,Cochrane Central Register of Controlled Trials,and Web of Science from inception of the database up to February 2019.Articles describing autologous fat grafting for breast augmentation were selected based on pre-determined inclusion and exclusion criteria.The characteristics of the included studies were summarized,and the reported volume retention rate from the studies was compared.A quality assessment of all included articles was performed using the methodological index for non-randomized studies criteria.Results:A total of 618 articles were identified,of which 12 studies,with a total of 1337 cases,were eligible.The retention rate of injected adipose tissue varied when the method of fat grafting and volume analysis used were both the same,as well as when the method of fat grafting was the same but the method of volumetric evaluation used was different.Conclusions:Currently,the tools available for estimating the volume retention rate come with limitations.In order to objectively evaluate the percentage of graft retention,a standard protocol that applies to the different methods should be established in the future.
文摘AIM:To evaluate the value of parameters on CT scan in predicting dysthyroid optic neuropathy(DON)and to provide guidance for early diagnosis of DON accordingly.METHODS:A total of 67 eyes of 35 patients with thyroid-associated ophthalmopathy(TAO)were included in this study.Patients were divided into 2 groups(DON group and non-DON group).Parameters were measured on high resolution CT,including muscle index(MI),superior ophthalmic vein(SOV)dilatation,extraocular muscle volume/orbit volume(MV/OV),and intracranial fat prolapsed,and be compared between these 2 groups.The relation between those parameters and visual function[visual acuity(VA)and visual field defect(VF defect)]were also evaluated.RESULTS:MI and MV/OV were significantly higher in DON group(P=0.00035 and P=0.00026).No significant difference was detected regarding intracranial fat prolapse existence and SOV dilatation(P=0.37 and P=0.15).MV/OV was found to have significant negative correlation with both VF defect(R=-0.332,P=0.0273)and VA(R=-0.635,P=0.00)while MI was found to have negative linear correlation with VA only(R=-0.456,P=0.00017).The area under receiver operating characteristic curves was 0.82 for MV/OV and 0.75 for MI.The best performance in detecting DON was achieved when MV/OV is set at 0.20 with 72%sensitivity and 87%specificity and MI is set at 0.52 with 64%sensitivity and 80%specificity.CONCLUSION:MI and MV/OV are predictive parameters for DON.Together with clinical manifestations,MV/OV≥0.2 can be used as a good indicator for DON in TAO patients.
基金Supported by International Spine Study Group and ParisTech BiomecAM chair program on subject-specific musculoskeletal modeling,with the support of Proteor,Covea,Société Général,ParisTech and Yves Cotrel Foundation
文摘AIM: To investigate fat infiltration and volume of spino-pelvic muscles in adults spinal deformity(ASD) with magnetic resonance imaging(MRI) and 3D reconstructions.METHODS: Nineteen female ASD patients(mean age 60 ± 13) were included prospectively and consecutively and had T1-weighted Turbo Spin Echo sequence MRIs with Dixon method from the proximal tibia up to T12 vertebra. The Dixon method permitted to evaluate the proportion of fat inside each muscle(fat-water ratio). In order to investigate the accuracy of the Dixon method for estimating fat vs water, the same MRI acquisition was performed on phantoms of four vials composed of different proportion of fat vs water. With Muscl'X software, 3D reconstructions of 17 muscles or group of muscles were obtained identifying the muscle's contour on a limited number of axial images [Deformation of parametric specific objects(DPSO) Method]. Musclar volume(Vmuscle), infiltrated fat volume(Vfat) and percentage of fat infiltration [Pfat, calculated as follow: Pfat = 100 ×(Vfat/Vmuscle)] were characterized by extensor or flexor function respectively for the spine, hip and knee and theirs relationship with demographic data were investigated. RESULTS: Phantom acquisition demonstrated a non linear relation between Dixon fat-water ratio and the real fat-water ratio. In order to correct the Dixon fatwater ratio, the non linear relation was approximated with a polynomial function of degree three using the phantom acquisition. On average, Pfat was 13.3% ± 5.3%. Muscles from the spinal extensor group had a Pfat significantly greater than the other muscles groups, and the largest variability(Pfat = 31.9% ± 13.8%, P < 0.001). Muscles from the hip extensor group ranked 2nd in terms of Pfat(14% ± 8%), and were significantly greater than those of the knee extensor(P = 0.030). Muscles from the knee extensor group demonstrated the least Pfat(12% ± 8%). They were also the only group with a significant correlation between Vmuscle and Pfat(r =-0.741, P < 0.001), however this correlation
