Diagnostic agreement between 3.0-T MRI sequences of nerve root and surgery in patients with cervical radiculopathy

Objective: We aimed to investigate the feasibility of multi-acquisition with variable resonance image combination slab selectivity inversion recovery (MAVRIC SL IR) sequence on 3.0 T MRI in patients with anterior cervical discectomy and fusion (ACDF) surgery compared to bandwidth-optimized short tau inversion recovery (STIR) sequence. Methods: Paired sagittal MR images of MAVRIC SL IR and bandwidth-optimized STIR sequences were acquired and analyzed for 21 patients after ACDF surgery with PEEK cage-plate construct. Quantitative comparisons were made on the metal artifact areas of paired mid-sagittal images. In qualitative analysis, the consistency of fat suppression and visibility of anatomic structures (bone-metal interface, surrounding soft tissues, and spinal cord) were independently assessed, based on a five-point scale by two musculoskeletal radiologists, who were blind to the images and patient details. Results: The application of the MAVRIC SL IR sequence resulted in a significant reduction of 48% in the mean area of metal artifacts (t =-7.141, P < 0.001). Based on the comments received from both the reviewers, MAVRIC SL IR sequence showed greater visibility of the bone-metal interface (P < 0.001), considerable visibility of the surrounding soft tissues (P > 0.05) but worse visibility obtained of the spinal cord (P < 0.001), including the consistency of fat suppression (P < 0.001) relative to the bandwidth-optimized STIR sequence. Conclusion: With significantly reduced metal artifacts, the MAVRIC SL IR sequence can be implemented in patients undergoing ACDF surgery with PEEK cage-plate construct for 3.0 T MRI, despite the poor visibility of the spinal cord.

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3.0 T MRI Diagnostic Features: Comparison with Lower Magnetic Fields

High Field Brain MRI ◽

10.1007/3-540-31776-7_3 ◽

2006 ◽

pp. 10-20 ◽

Cited By ~ 2

Author(s):

T. Scarabino ◽

G. M. Giannatempo ◽

T. Popolizio ◽

A. Simeone ◽

A. Maggialetti ◽

...

Keyword(s):

Magnetic Fields ◽

Diagnostic Features ◽

3.0 T ◽

3.0 T Mri

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Evaluation of endometrial thickness in postmenopausal women by using 3.0-T MRI

South African Journal of Radiology ◽

10.4102/sajr.v18i1.603 ◽

2014 ◽

Vol 18 (1) ◽

Cited By ~ 1

Author(s):

Junko Nakamura ◽

Takeharu Yoshikawa ◽

Eriko Maeda ◽

Hiroyuki Akai ◽

Hiroshi Ohtsu ◽

...

Keyword(s):

Postmenopausal Women ◽

Medical Records ◽

Endometrial Thickness ◽

Mr Images ◽

Endometrial Thickening ◽

3.0 T ◽

The Mean ◽

Magnetic Resonance Imaging Mri ◽

3.0 T Mri

Background: The accepted threshold for normal endometrial thickness is 5 mm; lesions with endometrial thickness < 5 mm are considered benign, whilst those > 5 mm areconsidered malignant. However, endometrium ≥ 5 mm on transvaginal ultrasonography inpostmenopausal woman is considered as asymptomatic endometrial thickening. However, recent studies suggest that asymptomatic endometrial thickness of even 8 mm – 11 mm in postmenopausal women may be normal.Objectives: The present study investigated the normal endometrial thickness range in 297 asymptomatic postmenopausal women using 3.0-T magnetic resonance imaging (MRI) T2-weighted sagittal images measured retrospectively by a single radiologist.Method: The data were classified according to patient age and postmenopausal duration, and the medical records and follow-up MR images were reviewed to assess the clinical outcome.Results: The mean endometrial thickness was 2.4 ± 0.1 mm (range: 0.1–11.6). The endometriumin 21 of 297 subjects was ≥ 5 mm thick. Follow-up MR images were obtained in 17 of these 21 women, and their endometrial thickness was found to have decreased in all of them. To date,none of the subjects has been diagnosed with endometrial cancer.Conclusion: Although 5 mm is considered the conservative threshold of normal endometrial thickness on MRI of postmenopausal women, this figure should not, to avoid excessive false-positive diagnoses, be assumed as an indication of malignancy.

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