Diffusion-weighted magnetic resonance imaging is useful for assessing inflammatory myopathies.
Muscle Nerve
; 59(5): 555-560, 2019 05.
Article
in En
| MEDLINE
| ID: mdl-30697788
ABSTRACT
INTRODUCTION:
Short tau inversion recovery (STIR) sequences in whole-body MRI are usually used for detecting muscle edema (ME) in inflammatory myopathies. We evaluated b-value 800 diffusion-weighted imaging (b800 DWI).METHODS:
Two radiologists independently and a consensus reader retrospectively reexamined 60 patients with inflammatory myopathies and 15 controls. For each participant, 78 muscles were analyzed with 3 sets of imaging acquisitions T1-weighted (T1) turbo spin echo and STIR; T1 and DWI; and T1, STIR and DWI. Mean edema per patient was compared between sequences. Agreement was evaluated.RESULTS:
Diffusion-weighted imaging detected more ME compared with STIR (P < 0.001). Agreement between readers was better with both sequences (k = 0.94) than with b800 DWI (k = 0.89) or STIR (k = 0.84) alone.DISCUSSION:
Diffusion-weighted imaging is a valuable add-on for the study of inflammatory myopathies. Muscle Nerve 59555-555, 2019.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Muscle, Skeletal
/
Edema
/
Myositis
Type of study:
Observational_studies
Limits:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Muscle Nerve
Year:
2019
Document type:
Article