New Methods for Measuring Atlanto-Axial Vertical Subluxation in Rheumatoid Arthritis by MR Imaging

Sung Ju Kim, Tadashi Ishibashi, Haruo Saito, Shin Maruoka, Shuichi Higano, Akihiro Sato, Shoki Takahashi, Shogo Yamada, Hikaru Hama, Kaneki Koyama, Toshio Mitomo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We proposed two new methods of measuring atlanto-axial vertical dislocation in rheumatoid arthritis by MR imaging. One is the distance from the subdental synchondrosis of the axis to the diameter of the ring of the atlas. The other is the distance from the midpoint of the anteroposterior ends of the inferior margin of the axis to the diameter of the ring of the atlas. Values were also determined by the Ranawat method and the Redlund-Johnell method. There was good correlation between values determined by the new methods and those determined by the Ranawat method and Redlund-Johnell method.

Original languageEnglish
Pages (from-to)94-96
Number of pages3
JournalNippon Acta Radiologica
Volume58
Issue number3
Publication statusPublished - 1998

Keywords

  • Atlas and axis
  • Dislocation
  • MR imaging
  • Rheumatoid arthritis

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Oncology

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