Quality Evaluation of Temporomandibular Joint Images from 3 High-resolution Dynamic Sequences.
10.3881/j.issn.1000-503X.15078
- Author:
Ping GAO
1
;
Chuan JIN
1
;
Lei WAGN
1
;
Tao WU
2
;
Juan LI
1
;
Xin GAO
1
;
Yu CHEN
1
;
Qi WANG
3
;
Yu-Hong WANG
1
;
Hua-Dan XUE
1
;
Zheng-Yu JIN
1
Author Information
1. Department of Radiology,PUMC Hospital,CAMS and PUMC,Beijing 100032,China.
2. GE Healthcare MR Clinical Marketing,Beijing 100176,China.
3. Department of Stomatology,PUMC Hospital,CAMS and PUMC,Beijing 100032,China.
- Publication Type:Journal Article
- Keywords:
articular disc;
articular disc movement;
mandibular condyle;
signal intensity;
signal-to-noise ratio;
temporomandibular joint
- MeSH:
Humans;
Temporomandibular Joint/diagnostic imaging*;
Motion;
Plastic Surgery Procedures
- From:
Acta Academiae Medicinae Sinicae
2023;45(1):50-56
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the image quality of three high-resolution dynamic MRI methods for evaluating the motion of temporomandibular joint disc and condyle. Methods Twenty-five patients with suspected temporomandibular joint disorders were examined by single-shot fast spin-echo (SSFSE),fast imaging employing steady-state acquisition (FIESTA),and spoiled gradient echo (SPGR) on the oblique sagittal position.Two radiologists performed subjective and objective evaluation on the images with double-blind method.The subjective evaluation included the signal intensity of mandibular condyle,articular disc,soft tissue around articular disc,and lateral pterygoid muscle,the contrast between articular disc and condyle,the contrast between articular disc and surrounding soft tissue,condylar motion,and disc movement.The objective evaluation indexes included image signal intensity,signal-to-noise ratio (SNR),and contrast-to-noise ratio (CNR).The subjective and objective indexes of the image quality were compared between the three sequences. Results The SSFSE sequence had lower signal intensity of articular disc and higher signal intensity of condyle and surrounding soft tissue than FIESTA and SPGR sequences (all P<0.001).The SPGR sequence showed higher signal intensity of lateral pterygoid muscle than the SSFSE and FIESTA sequences (P=0.017,P<0.001).Among the three sequences,SSFSE sequence showed the clearest articular disc structure (χ2=41.952,P<0.001),the strongest contrast between articular disc and condyle (χ2=35.379,P<0.001),the strongest contrast between articular disc and surrounding soft tissue (χ2=27.324,P<0.001),and the clearest movement of articular disc (χ2=44.655,P<0.001).SSFSE and FIESTA sequences showed higher proportion of disc displacement and reduction than SPGR sequence (all P<0.001).The CNR (χ2=21.400,P<0.001),SNR (χ2=34.880,P<0.001),and condyle signal intensity (F=337.151,P<0.001) demonstrated differences among SSFSE,FIESTA,and SPGR sequences.The CNR of SSFSE sequence was higher than that of FIESTA sequence (P<0.001),while it had no significant difference between SSFSE and SPGR sequences (P=0.472).In addition,the SSFSE sequence had higher SNR and signal intensity than FIESTA and SPGR sequences (all P<0.001). Conclusion The best image quality can be observed from SSFSE sequence where both the structure and movement of temporomandibular joint are well displayed.Therefore,SSFSE is preferred for the examination of temporomandibular joint movement.
