title: [Lateral radiography of the knee with single-leg standing].
abstract: The purpose of this investigation was to accomplish reproducible radiography of single-leg standing lateral radiography of the knee by adjusting lateral rotation using a ruler to measure foot position. After preliminary assessment of three-dimensional CT of the knees of normal volunteers, the best adjustment of external rotation was estimated. A ruler was made for use in adjusting the angle of knee rotation by measuring foot rotation. Based on the foot rotation measured by this ruler, the positioning of radiography was adjusted to correct rotation. Rotation was estimated by the distance between the posterior edges of the lateral and medial femoral condyles. Fifteen-degree and 17.5-degree rotations were used for correction. Correction of rotation was 17 degrees on average. This helped not only to correct external rotation in the initial radiography but also to correct rotation for repeat radiography. Our method is quantitative and highly reproducible, and it increases the success rate of lateral knee radiography.
authors.affiliation: Center for Radiological Sciences, Iwate Medical University Hospital, Japan.
authors.forename: Kan
authors.initials: K
authors.lastname: Ohmori
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Sugawara
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Murakami
authors.forename: Mikio
authors.initials: M
authors.lastname: Kirinai
authors.forename: Junichi
authors.initials: J
authors.lastname: Fujiwara
authors.forename: Takumi
authors.initials: T
authors.lastname: Oikawa
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Matsumura
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Sugawara
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005528:Foot / Q000502:physiology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000502:physiology; D007866:Leg / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D016059:Range of Motion, Articular; D015203:Reproducibility of Results; D012399:Rotation; D014057:Tomography, X-Ray Computed / Q000379:methods*