Magnetic resonance imaging of the posterior cruciate ligament in flexion.
Knee
; 25(3): 507-512, 2018 Jun.
Article
em En
| MEDLINE
| ID: mdl-29548815
ABSTRACT
BACKGROUND:
Posterior cruciate ligament (PCL) injuries of the knee are common and sometimes difficult to diagnose. Magnetic resonance imaging (MRI), performed using standard orthogonal plane views, is the investigation of choice. It can be particularly difficult to differentiate acute partial and complete tears and identify elongation of chronic healed tears. The aim of the paper is to describe a new method of positioning the patient with the knee flexed at 90°, allowing the PCL to be visualised in a position of greatest length and tension which may assist in differentiating and identifying these injuries.METHODS:
Four symptomatic patients with suspected PCL injuries, two acute and two chronic, were MRI scanned using a routine protocol with the knee in extension before performing oblique sagittal fast spin-echo (FSE) proton-density (PD) sequences with the knee positioned in 90° of flexion. The appearance of the PCLs were then qualitatively assessed.RESULTS:
MRI scanning with the knee in flexion identified more extensive PCL injury than standard imaging. In the two patients with acute injuries, partial tears on the standard orthogonal plane views were found to be complete ruptures. In the two patients with chronic injuries, elongation of the PCL not identifiable on the standard orthogonal plane views was apparent.CONCLUSION:
MRI scanning of the PCL with the knee flexed at 90° may help in differentiating partial and complete ruptures of the PCL and identifying elongation of the PCL in chronic injuries.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Imageamento por Ressonância Magnética
/
Ligamento Cruzado Posterior
/
Traumatismos do Joelho
/
Articulação do Joelho
Tipo de estudo:
Guideline
/
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Knee
Ano de publicação:
2018
Tipo de documento:
Article