Risonanza magnetica dell'anca protesizzata dolorosa: Riconoscimento e caratterizzazione delle raccolte fluide periprotesiche e valutazione della riproducibilità interosservatore

Translated title of the contribution: Magnetic resonance imaging of painful total hip replacement: Detection and characterisation of periprosthetic fluid collection and interobserver reproducibility

A. Aliprandi, L. M. Sconfienza, F. Randelli, M. Bandirali, G. Di Leo, F. Sardanelli

Research output: Contribution to journalArticle

Abstract

Purpose: The purpose of our study was to demonstrate the diagnostic value of magnetic resonance imaging (MRI) when measuring and characterising periprosthetic fluid collections in patients with painful hip prosthesis and to provide an estimation of interobserver reproducibility. Materials and methods: Nineteen patients (mean age 59±13 years) with painful total hip replacement and clinical suspicion of infection underwent MRI. Images were reviewed blindly by two musculoskeletal radiologists with different levels of experience who evaluated the presence/absence of soft tissue oedema or fluid collection (when present, three-plane maximal diameters were measured; involvement of skin/subcutaneous/deep tissues or prosthesis were estimated; fluid was classified as serous/purulent/haematic according to signal behaviour). Interobserver agreement was calculated (Cohen's ). Results: A total of 26 MRI studies were carried out (three patients underwent two and two patients underwent three MRI examinations). Both readers detected soft tissue oedema (13/26, 50%) or fluid collection (21/26, 81%) and characterised the fluid as serous (9/21, 43%), purulent (8/21, 38%) or haematic (4/21, 19%). The collection involved skin/subcutaneous tissues (16/21, 76%), deep soft tissues (19/21, 91%) or the implant (12/21, 57%). For all evaluations, interobserver agreement was complete (=1). No significant differences were found between the measurements of the collections (p>0.258). Conclusions: MRI is highly reproducible in detection, localisation, quantification, and characterisation of fluid collections when the presence of implant infection is clinically suspected.

Original languageItalian
Pages (from-to)85-95
Number of pages11
JournalRadiologia Medica
Volume117
Issue number1
DOIs
Publication statusPublished - Feb 2012

Fingerprint

Hip Replacement Arthroplasties
Magnetic Resonance Imaging
Subcutaneous Tissue
Edema
Hip Prosthesis
Skin
Infection
Prostheses and Implants

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Medicine(all)

Cite this

@article{19686b3570904bf6a0ad803a02b6805c,
title = "Risonanza magnetica dell'anca protesizzata dolorosa: Riconoscimento e caratterizzazione delle raccolte fluide periprotesiche e valutazione della riproducibilit{\`a} interosservatore",
abstract = "Purpose: The purpose of our study was to demonstrate the diagnostic value of magnetic resonance imaging (MRI) when measuring and characterising periprosthetic fluid collections in patients with painful hip prosthesis and to provide an estimation of interobserver reproducibility. Materials and methods: Nineteen patients (mean age 59±13 years) with painful total hip replacement and clinical suspicion of infection underwent MRI. Images were reviewed blindly by two musculoskeletal radiologists with different levels of experience who evaluated the presence/absence of soft tissue oedema or fluid collection (when present, three-plane maximal diameters were measured; involvement of skin/subcutaneous/deep tissues or prosthesis were estimated; fluid was classified as serous/purulent/haematic according to signal behaviour). Interobserver agreement was calculated (Cohen's ). Results: A total of 26 MRI studies were carried out (three patients underwent two and two patients underwent three MRI examinations). Both readers detected soft tissue oedema (13/26, 50{\%}) or fluid collection (21/26, 81{\%}) and characterised the fluid as serous (9/21, 43{\%}), purulent (8/21, 38{\%}) or haematic (4/21, 19{\%}). The collection involved skin/subcutaneous tissues (16/21, 76{\%}), deep soft tissues (19/21, 91{\%}) or the implant (12/21, 57{\%}). For all evaluations, interobserver agreement was complete (=1). No significant differences were found between the measurements of the collections (p>0.258). Conclusions: MRI is highly reproducible in detection, localisation, quantification, and characterisation of fluid collections when the presence of implant infection is clinically suspected.",
keywords = "Fluid collection, Infection, Interobserver reproducibility, Magnetic resonance imaging, Total hip arthroplasty",
author = "A. Aliprandi and Sconfienza, {L. M.} and F. Randelli and M. Bandirali and {Di Leo}, G. and F. Sardanelli",
year = "2012",
month = "2",
doi = "10.1007/s11547-011-0706-5",
language = "Italian",
volume = "117",
pages = "85--95",
journal = "Radiologia Medica",
issn = "0033-8362",
publisher = "Springer-Verlag Italia s.r.l.",
number = "1",

}

TY - JOUR

T1 - Risonanza magnetica dell'anca protesizzata dolorosa

T2 - Riconoscimento e caratterizzazione delle raccolte fluide periprotesiche e valutazione della riproducibilità interosservatore

AU - Aliprandi, A.

AU - Sconfienza, L. M.

AU - Randelli, F.

AU - Bandirali, M.

AU - Di Leo, G.

AU - Sardanelli, F.

PY - 2012/2

Y1 - 2012/2

N2 - Purpose: The purpose of our study was to demonstrate the diagnostic value of magnetic resonance imaging (MRI) when measuring and characterising periprosthetic fluid collections in patients with painful hip prosthesis and to provide an estimation of interobserver reproducibility. Materials and methods: Nineteen patients (mean age 59±13 years) with painful total hip replacement and clinical suspicion of infection underwent MRI. Images were reviewed blindly by two musculoskeletal radiologists with different levels of experience who evaluated the presence/absence of soft tissue oedema or fluid collection (when present, three-plane maximal diameters were measured; involvement of skin/subcutaneous/deep tissues or prosthesis were estimated; fluid was classified as serous/purulent/haematic according to signal behaviour). Interobserver agreement was calculated (Cohen's ). Results: A total of 26 MRI studies were carried out (three patients underwent two and two patients underwent three MRI examinations). Both readers detected soft tissue oedema (13/26, 50%) or fluid collection (21/26, 81%) and characterised the fluid as serous (9/21, 43%), purulent (8/21, 38%) or haematic (4/21, 19%). The collection involved skin/subcutaneous tissues (16/21, 76%), deep soft tissues (19/21, 91%) or the implant (12/21, 57%). For all evaluations, interobserver agreement was complete (=1). No significant differences were found between the measurements of the collections (p>0.258). Conclusions: MRI is highly reproducible in detection, localisation, quantification, and characterisation of fluid collections when the presence of implant infection is clinically suspected.

AB - Purpose: The purpose of our study was to demonstrate the diagnostic value of magnetic resonance imaging (MRI) when measuring and characterising periprosthetic fluid collections in patients with painful hip prosthesis and to provide an estimation of interobserver reproducibility. Materials and methods: Nineteen patients (mean age 59±13 years) with painful total hip replacement and clinical suspicion of infection underwent MRI. Images were reviewed blindly by two musculoskeletal radiologists with different levels of experience who evaluated the presence/absence of soft tissue oedema or fluid collection (when present, three-plane maximal diameters were measured; involvement of skin/subcutaneous/deep tissues or prosthesis were estimated; fluid was classified as serous/purulent/haematic according to signal behaviour). Interobserver agreement was calculated (Cohen's ). Results: A total of 26 MRI studies were carried out (three patients underwent two and two patients underwent three MRI examinations). Both readers detected soft tissue oedema (13/26, 50%) or fluid collection (21/26, 81%) and characterised the fluid as serous (9/21, 43%), purulent (8/21, 38%) or haematic (4/21, 19%). The collection involved skin/subcutaneous tissues (16/21, 76%), deep soft tissues (19/21, 91%) or the implant (12/21, 57%). For all evaluations, interobserver agreement was complete (=1). No significant differences were found between the measurements of the collections (p>0.258). Conclusions: MRI is highly reproducible in detection, localisation, quantification, and characterisation of fluid collections when the presence of implant infection is clinically suspected.

KW - Fluid collection

KW - Infection

KW - Interobserver reproducibility

KW - Magnetic resonance imaging

KW - Total hip arthroplasty

UR - http://www.scopus.com/inward/record.url?scp=84857659138&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84857659138&partnerID=8YFLogxK

U2 - 10.1007/s11547-011-0706-5

DO - 10.1007/s11547-011-0706-5

M3 - Articolo

C2 - 21744254

AN - SCOPUS:84857659138

VL - 117

SP - 85

EP - 95

JO - Radiologia Medica

JF - Radiologia Medica

SN - 0033-8362

IS - 1

ER -