Usefulness of Proton Density and T2-Weighted vs. T1-Weighted MRI in Diagnoses of TMJ Disk Status

Sano, Tsukasa; Widmalm, Sven‐Erik; Yamamoto, Mika; Sakuma, Katsuya; Araki, Kento; Matsuda, Yukiko; Okano, Toshio

doi:10.1080/08869634.2003.11746259

Cited by 22 publications

(19 citation statements)

References 18 publications

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“…The slice thickness in each sliced image was 3 mm with additionally 20% gap. Proton density weighted images (PDWI) and T2-weighted images (T2WI) were simultaneously taken by the doubleecho sequence [9]. The settings of TR/TE were 3,300 /14 ms (PDWI) and 3,300/85 ms (T2WI).…”

Section: Mr-image Acquisitionmentioning

confidence: 99%

“…Due to the frequent occurrence of TMJ disorders and for the sake of patients' convenience, fast examination time and cost-efficiency of the radiological data acquisition are highly favored. Detailed research has been carried out concerning the choice of MRI protocols where T1-, T2-, or proton density (PD) weighted MR images were discussed in the literature [9][10][11]. As regards MR image positioning, the acquisition of parasagittal images oriented according to the individual angle of the mandibular condyle [12] or parasagittal images supplemented with coronal images has proven as good clinical standard usually provided with 3 mm slice thickness.…”

Section: Introductionmentioning

confidence: 99%

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3D-visualization of the temporomandibular joint with focus on the articular disc based on clinical T1-, T2-, and proton density weighted MR images

Kober¹,

Yuki

Kinzinger

et al. 2007

Int J CARS

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Objective An approach of 3D-visualization of the temporomandibular joint (TMJ) with special focus on the articular disc based on magnetic resonance imaging (MRI) was developed for the purpose of diagnosis support. Materials and methods Mandibular condyle and fossa were reconstructed as 3D-surfaces. Articular disc, retrocondylar tissue, and the lateral pterygoid muscle were visualized by means of direct volume rendering. By simultaneous visualization of both, the bony surfaces and the soft tissue, anterior disc displacement could be recognized in 3D-context. Additional superposition of the 3D-visualization with the original 2D-MRI slices allowed for a combination with conventional diagnostics. The method was tested for clinical T1-, T2-, and This paper has been written on behalf of a publication request following Cars proton density weighted MRI data from four independent medical institutions. Results For all cases, the skeletal anatomy could be reproduced. Applied validation approaches showed good results. Anterior disc displacement could be clearly depicted as well as the incidence of reduction of the disc. By several experienced observers, the approach was rated as significant. Conclusion Although partially non-standard in the clinical routine the new method provided promising results for efficient diagnosis support. Its validity in the medical practice, namely, its impact for dislocation/deformity of the mandibular disc will be further analyzed.

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Section: Mr-image Acquisitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D-visualization of the temporomandibular joint with focus on the articular disc based on clinical T1-, T2-, and proton density weighted MR images

Kober¹,

Yuki

Kinzinger

et al. 2007

Int J CARS

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“…[2][3][4] Another paper reports the 95z accuracy of MR imaging in assessing disk position and form and 93z accuracy in assessing osseous changes. 5 Proton density-weighted images (PDWI) are necessary to detect the position and deformity of the articular disk, [6][7][8] and T 2 -weighted images (T 2 WI) are necessary to detect the level of joint eŠusion, which is associated with pain. 8,9 A dual echo technique is generally used for 2-dimensional (2D)-PDWI and -T 2 WI scans.…”

Section: Introductionmentioning

confidence: 99%

Usefulness of Dual Echo Volumetric Isotropic Turbo Spin Echo Acquisition (VISTA) in MR Imaging of the Temporomandibular Joint

Sugimori¹,

Tanaka²,

Nishimura³

et al. 2013

magn reson med sci

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Purpose: We investigated the ability to detect the articular disk and joint eŠusion of the temporomandibular joint (TMJ) of a method of dual echo volumetric isotropic turbo spin echo acquisition (DE-VISTA) additional fusion images (AFI).Methods: DE-VISTA was performed in the 26 TMJ of 13 volunteers and 26 TMJ of 13 patients. Two-dimensional (2D) dual echo turbo spin echo was performed in the 26 TMJ of 13 volunteers. On a workstation, we added proton density-weighted images (PDWI) and T 2 weighted images (T 2 WI) of the DE-VISTA per voxel to reconstruct DE-VISTA-AFI. Two radiologists reviewed these images visually and quantitatively.Results: Visual evaluation of the articular disk was equivalent between DE-VISTA-AFI and 2D-PDWI. The sliding thin-slab multiplanar reformation (MPR) method of DE-VISTA-AFI could detect all articular disks. The ratio of contrast (CR) of adipose tissue by the articular disk to that of the articular disk itself was signiˆcantly higher in DE-VISTA-AFI than DE-VISTA-PDWI (Pº0.05) in patients and volunteers with closed or open mouth. In volunteers, the CR between adipose tissue and the disk on DE-VISTA-AFI was marginally signiˆcant to that on 2D-PDWI at opened mouth (P＝0.071) and not signiˆcantly diŠerent (P＝0.18) from that at closed mouth. Joint eŠusion could be identiˆed in DE-VISTA-AFI in all 8 joints that had joint eŠusion in DE-VISTA-T 2 WI but in only 3 of those joints in 2D-T 2 WI. The CR of joint eŠusion to adipose tissue on DE-VISTA-AFI did not diŠer signiˆcantly from that on DE-VISTA-PDWI. However, using DE-VISTA-T 2 WI in addition to DE-VISTA-PDWI, we could visually identify joint eŠusion on DE-VISTA-AFI that could not be identiˆed on DE-VISTA-PDWI alone.Conclusion: DE-VISTA-AFI can depict the articular disk and a small amount of joint eŠusion by the required plane of MPR using the sliding thin-slab MPR method.

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“…This fluid is well depicted on T2W images 7,13,18,24,26,28) . Joint fluid accumulations are only observed in symptomatic patients.…”

Section: Discussionmentioning

confidence: 84%

Magnetic Resonance Signal Intensity from Retrodiscal Tissue Related to Joint Effusion Status and Disc Displacement in Elderly Patients with Temporomandibular Joint Disorders

Ohkubo

Sano

Otonari-Yamamoto

et al. 2009

Bull. Tokyo Dent. Coll.

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Magnetic resonance imaging (MRI) on patients with temporomandibular joint disorders (TMD) has revealed that a decrease and/or increase in signal intensity from retrodiscal tissue, joint effusion (the excessive accumulation of joint fluid) and articular disc displacement are related to TMD. However, the effect of aging on these phenomena has yet to be clarified. This study was carried out to explore the relationship between changes in signal intensity from retrodiscal tissue, joint fluid status and pathological disc conditions in elderly patients with TMD. Twenty patients aged over 60 years were examined. They consisted of one man and 19 women, and ranged between 60 and 79 years in age (mean, 66.0 years). The relationships between decreased signal intensity on proton-density-weighted (PDW) images and increased signal intensity on T2-weighted (T2W) MR images from retrodiscal tissue, joint fluid status and state of articular disc were examined. Joint fluid status was classified into 5 levels by extent of high signal areas in upper and lower articular spaces on T2W images. Disc displacement status was evaluated by PDW images. The Wilcoxon test was applied for the statistical analysis. The group showing increased T2W signal intensities from the retrodiscal tissue consisted of 31 out of 40 joints (77.5%). This group showed a significant difference in comparison with the other groups in which no apparent joint fluid was shown (pϽ0.05). There were no statistically significant differences among other categories. The results suggest a negative relationship between joint fluid and increased signal intensity from retrodiscal tissue due to reflection of the inflammatory reaction in TM joints.

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Usefulness of Proton Density and T2-Weighted vs. T1-Weighted MRI in Diagnoses of TMJ Disk Status

Cited by 22 publications

References 18 publications

3D-visualization of the temporomandibular joint with focus on the articular disc based on clinical T1-, T2-, and proton density weighted MR images

3D-visualization of the temporomandibular joint with focus on the articular disc based on clinical T1-, T2-, and proton density weighted MR images

Usefulness of Dual Echo Volumetric Isotropic Turbo Spin Echo Acquisition (VISTA) in MR Imaging of the Temporomandibular Joint

Magnetic Resonance Signal Intensity from Retrodiscal Tissue Related to Joint Effusion Status and Disc Displacement in Elderly Patients with Temporomandibular Joint Disorders

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