3-T MRI in Patients Received Anterior Cervical Discectomy and Fusion Surgery with MAVRIC SL IR Sequence: A Feasibility Study

2021 ◽  
Vol 24 ◽  
Author(s):  
Renjie Yang ◽  
Changsheng Liu ◽  
Liang Li ◽  
Liang Chen ◽  
Weiyin Vivian Liu ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Soft Tissues ◽  
Fat Suppression ◽  
Anterior Cervical Discectomy ◽  
Peek Cage ◽  
Metal Interface ◽  
Metal Artifacts ◽  
Stir Sequence ◽  
3.0 T ◽  
3.0 T Mri

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.

Normal development of the fetal spinal canal and spinal cord at T12 on 3.0-T MRI

2018 ◽  
Vol 60 (5) ◽  
pp. 623-627
Author(s):  
Mingming Miao ◽  
Xiangtao Lin ◽  
Zhonghe Zhang ◽  
Hui Zhao
Keyword(s):  
Spinal Cord ◽  
Regression Analysis ◽  
Linear Regression ◽  
Gestational Age ◽  
Spinal Canal ◽  
Linear Regression Analysis ◽  
Sectional Area ◽  
Cross Sectional ◽  
3.0 T ◽  
3.0 T Mri

Background The studies that described the dimensions of the normal fetal thoracic spinal canal and spinal cord on magnetic resonance imaging (MRI) are scarce. Purpose To determine the normal appearance of the fetal spinal canal and spinal cord at T12 across different gestational ages using 3.0-T MRI. Material and Methods The spines of 43 normal human fetuses, aged 15–40 weeks, were scanned by 3.0-T MRI. All specimens were scanned using a GE 3.0-T MRI scanner. Imaging of the T12 vertebrae was performed in the coronal, sagittal, and axial planes. The anterior-posterior (AP) diameter, width, and cross-sectional area of the spinal canal and spinal cord at T12 were measured. The influence of gestational age on these parameters was investigated with a scatter plot and linear regression analysis using Pearson correlation coefficient. Results The normal morphology of the fetal vertebra at T12 can be clearly showed by MRI; the spinal canal appeared circular, while the spinal cord was ellipsoid. Linear regression analysis showed a significant positive correlation between the AP diameter, width, and cross-sectional area of the spinal canal at T12 and gestational age. Conclusion Postmortem MRI is a reliable method for understanding the growth dynamics of the spinal canal and spinal cord at T12. Findings from this study would benefit the prenatal diagnosis of congenital malformations by MRI.

The 1000Plus study protocol – a prospective observational study on the mismatch concept in a 3.0 T MRI

2009 ◽  
Vol 36 (S 02) ◽  
Author(s):  
B Hotter ◽  
S Pittl ◽  
M Ebinger ◽  
G Oepen ◽  
K Jegzentis ◽  
...  
Keyword(s):  
Observational Study ◽  
Study Protocol ◽  
Prospective Observational Study ◽  
3.0 T ◽  
3.0 T Mri

Endoscopic Endonasal Pituitary Adenoma Resection with Intraoperative 3.0 T MRI Scanning

Skull Base ◽  
2009 ◽  
Vol 19 (01) ◽  
Author(s):  
David Netuka ◽  
Vaclav Masopust ◽  
Tomas Belsan ◽  
Vladimir Beneš
Keyword(s):  
Pituitary Adenoma ◽  
Endoscopic Endonasal ◽  
3.0 T ◽  
3.0 T Mri

Anterior Cervical Discectomy With Fusion and Plating for Correction of Degenerative Cervical Kyphosis: 2-Dimensional Operative Video

2020 ◽  
Author(s):  
Jeremy M V Guinn ◽  
Brenton Pennicooke ◽  
Joshua Rivera ◽  
Praveen V Mummaneni ◽  
Dean Chou
Keyword(s):  
Spinal Cord ◽  
Informed Consent ◽  
Bone Density ◽  
Surgical Intervention ◽  
Anterior Cervical Discectomy ◽  
Cervical Kyphosis ◽  
Nerve Roots ◽  
Cervical Discectomy ◽  
Cervical Plate ◽  
Sequential Induction

Abstract This surgical video demonstrates the technique for correcting degenerative cervical kyphosis using an anterior cervical discectomy and fusion (ACDF). Degenerative cervical kyphosis can cause radiculopathy, myelopathy, and difficulty holding up one's head. The goal of surgical intervention is to alleviate pain, improve the ability for upright gaze, and decompress the spinal cord or nerve roots. Posterior-only approaches and anterior corpectomies are alternative treatments to address cervical kyphosis. However, an ACDF allows for sequential induction of lordosis via distraction over multiple segments and for further lordosis induction by sequential screw tightening, pulling the spine towards a lordotic cervical plate.1 This video shows 2 cases demonstrating a technique of correcting severe cervical degenerative kyphosis. The video illustrates our initial kyphotic Caspar pin placement coupled with sequential anterior distraction to correct kyphosis. The technique is most useful in patients who have good bone density, nonankylosed facets, and degenerative cervical kyphosis. We have received informed consent of this patient to submit this video.

scholarly journals Radiofrequency heating of metallic dental devices during 3.0 T MRI

2013 ◽  
Vol 42 (5) ◽  
pp. 20120234 ◽  
Author(s):  
M Hasegawa ◽  
K Miyata ◽  
Y Abe ◽  
T Ishigami
Keyword(s):  
Radiofrequency Heating ◽  
3.0 T ◽  
3.0 T Mri

scholarly journals Effect of orthodontic brackets and different wires on radiofrequency heating and magnetic field interactions during 3.0-T MRI: Author response

2016 ◽  
Vol 45 (1) ◽  
pp. 20150314
Author(s):  
Serkan Görgülü ◽  
Simel Ayyıldız ◽  
Kıvanç Kamburoğlu ◽  
Sıla Gökçe ◽  
Tuncer Ozen
Keyword(s):  
Magnetic Field ◽  
Orthodontic Brackets ◽  
Author Response ◽  
Radiofrequency Heating ◽  
3.0 T ◽  
3.0 T Mri

Part II: Spinal-cord neoplasms—primary tumours of the bony spine and adjacent soft tissues

2007 ◽  
Vol 8 (2) ◽  
pp. 137-147 ◽  
Author(s):  
Charles A Sansur ◽  
Nader Pouratian ◽  
Aaron S Dumont ◽  
David Schiff ◽  
Christopher I Shaffrey ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Soft Tissues ◽  
Spinal Cord Neoplasms

3.0 T MRI Diagnostic Features: Comparison with Lower Magnetic Fields

2006 ◽  
pp. 10-20 ◽  
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

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

2014 ◽  
Vol 18 (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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