Asian Spine Journal

Lee: Response to: “T1 Slope in the Cervical Spine Magnetic Resonance Imaging: A Novel Concept”

Letter to the Editor

Online first: February 07, 2018

DOI: https://doi.org/10.4184/asj.2018.12.1.194

Response to: “T1 Slope in the Cervical Spine Magnetic Resonance Imaging: A Novel Concept”

Department of Orthopaedic Surgery, Gwangmyeong Sungae Hospital, Gwangmyeong, Korea.

Corresponding author: Seung-Hwan Lee. Department of Orthopaedic Surgery, Gwangmyeong Sungae Hospital, 36 Digital-ro, Gwangmyeong, 14241 Korea. TEL: +82-2-2680-7699, FAX: +82-2-2680-7755, java5885@gmail.com

Received January 05, 2018

Korean Society of Spine Surgery

(open-access, http://creativecommons.org/licenses/by-nc/4.0/):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Comment:

1. T1 slope was measured as the angle between a horizon tal line and superior endplate of T1 in standing lateral radiograph of cervical spine[1].

2. Cervical lordosis was measured between lower end plate of C2 and inferior end plate of C7 in the same standing lateral radiograph[2].

3. Cervical intervertebral disc degeneration was measured in T2-weighted sagittal images based on the magnetic resonance imaging-based grading system.

4. T1 slope could not be measured in MRI because the subject was in lying position.

5. In our study, patients with low T1 slope(≤25°) in standing lateral radiograph had higher grade of degeneration in cervical MRI than patients with high T1 slope(>25) in C5–6 and C6–7 intervertebral discs[3].

Notes

Notes: Conflict of Interest: No potential conflict of interest relevant to this article was reported.

REFERENCES

REFERENCES: 1. Knott PT, Mardjetko SM, Techy F. The use of the T1 sagittal angle in predicting overall sagittal balance of the spine. Spine J 2010;10:994–998. PMID: 20970739.
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2. Miyazaki M, Hong SW, Yoon SH, et al. Reliability of a magnetic resonance imaging-based grading system for cervical intervertebral disc degeneration. J Spinal Disord Tech 2008;21:288–292. PMID: 18525490.
[Article] [PubMed]

3. Yang BS, Lee SK, Song KS, et al. The Use of T1 Sagittal Angle in Predicting Cervical Disc Degeneration. Asian Spine J 2015;9:757–761. PMID: 26435795.
[Article] [PubMed] [PMC]