Reliability and Normal Values of Various Computed Tomography Methods for Quantifying Distal Radioulnar Joint Translation

Mm Jong Park; Jong Pil Kim
January 2008
Journal of Bone & Joint Surgery, American Volume;Jan2008, Vol. 90-A Issue 1, p145
Academic Journal
Background: Several techniques have been proposed to measure translation of the distal radioulnar joint on computed tomography scans, but the criteria for diagnosing abnormal subluxation have not been standardized. The aims of this study were to evaluate the reliability of the current methods and to derive normal population values with these methods. Methods: Computed tomography scans of forty-five asymptomatic wrists were performed with the hand in supination, neutral, and pronation. Four methods for diagnosing subluxation of the distal radioulnar joint were used: the radioulnar line method; the epicenter method; the radioulnar ratio method; and the subluxation ratio method, which is a modification of the radioulnar line method that involves use of a line perpendicular to the sigmoid notch. Three observers measured all of the scans independently and repeated the measurements three months later to determine the interobserver and intraobserver reliability. All of the measurements for each subject were averaged, and the average was considered to be the normal value for that subject. Results: Interobserver reliability was best (substantial to almost perfect) with use of the subluxation ratio method. The intraclass correlation coefficients showed substantial to almost perfect reliability of the radioulnar line method, substantial reliability of the radioulnar ratio method, and moderate to substantial reliability of the epicenter method. The intraobserver reliability of all methods was almost perfect. The radioulnar line and subluxation ratio methods always showed the ulnar head to be located outside of the dorsal line in pronation and outside of the volar line in supination. The normal epicenter values indicated that the center of rotation of the distal radioulnar joint fell in the middle half of the sigmoid notch in all positions. The normal ranges derived with the radioulnar ratio method demonstrated larger variation than originally reported. Conclusions: This study suggests that the subluxation ratio method is the most useful technique for measuring translation of the distal radioulnar joint as a result of its reliability and simplicity. Substantial variations in normal values derived with the current methods should be considered in a computed tomography evaluation of the distal radioulnar joint in symptomatic patients.


Related Articles

  • Automated Multidetector Row CT Dataset Segmentation with an Interactive Watershed Transform (IWT) Algorithm: Part 1. Understanding the IWT Technique. Heath, David; Hahn, Horst; Johnson, Pamela; Fishman, Elliot // Journal of Digital Imaging;Dec2008, Vol. 21 Issue 4, p408 

    Segmentation of volumetric computed tomography (CT) datasets facilitates evaluation of 3D CT angiography renderings, particularly with maximum intensity projection displays. This manuscript describes a novel automated bone editing program that uses an interactive watershed transform (IWT)...

  • Cardiac computed tomographic angiography: evaluation of non-cardiac structures. Wann, Samuel; Rao, Peter; Des Prez, Roger // Journal of Nuclear Cardiology;Jan2009, Vol. 16 Issue 1, p139 

    Cardiac computed tomography is a promising new technology for non-invasive evaluation of the coronary arteries. As CT is inherently a high resolution volumetric imaging modality, data from structures other than the heart can be accessed in studies performed primarily for cardiac indications....

  • MRI a Better Tool For Bionic Ears.  // Nutrition Health Review: The Consumer's Medical Journal;2005, Issue 93, p18 

    The article reports that magnetic resonance imaging (MRI) may be a better diagnostic tool for evaluating cochlear ear implants than the more commonly used high-resolution computed tomography (CT), according to a study at the University of Texas. Peter Roland, professor and chairman of...

  • Primary Leiomyoma of the pleura.  // World Journal of Surgical Oncology;2011, Vol. 9 Issue 1, p76 

    The article presents a cast study of a 45 years old man with right chest pain. It states that computed tomography (CT) revealed a mass located in the right anterior chest wall. It mentions that the patient underwent a right posterolateral thoracotomy and tumor was resected with surrounding...

  • computed tomography. Peters, Michael // BMA A-Z Family Medical Encyclopedia;2004, p189 

    An encyclopedia entry for "computed tomography" is presented. It is another medical term for CT scanning.

  • High-Resolution Computed Tomography with 16-Row MDCT: A Comparison Regarding Visibility and Motion Artifacts of Dose-Modulated Thin Slices and “Step and Shoot” Images. Vikgren, J.; Johnsson, Å. A.; Flinck, A.; Kheddache, S.; Milde, H.; Båth, M. // Acta Radiologica;Sep2008, Vol. 49 Issue 7, p755 

    Background: Dose modulation can be used to reduce the radiation dose in computed tomography (CT) examinations while still obtaining the necessary diagnostic image quality. Multidetector-row computed tomography (MDCT) provides the possibility of simultaneous reconstruction of thin and thick...

  • CT: Supermodality. Diiulio, Renee // Medical Imaging;Jan2008, Vol. 23 Issue 1, p18 

    The article offers information on multislice computer tomography (CT). The applications of CT have expanded and the modality today is in various states of adoption for a wide spectrum of procedures. Some of the advantages of CT are faster exam times, a noninvasive nature, and clear images that...

  • Standardized volumetric 3D-analysis of SPECT/CT imaging in orthopaedics: overcoming the limitations of qualitative 2D analysis.  // BMC Medical Imaging;2012, Vol. 12 Issue 1, p5 

    The article offers information on a method proposed by the authors to normalize single photon emission computerized tomography (SPECT)/computerized tomography (CT) data, which enables standardized three-dimensional (3D) volumetric quantitative measurements among orthopaedics. The method is based...

  • Imaging assessment of renal masses. Spendiff, R.; Rockall, A. // Imaging (09656812);2008, Vol. 20 Issue 3, p205 

    Contrast-enhanced computed tomography (CT) techniques are the foundations of renal mass evaluation. The main roles of the radiologist are to differentiate, where possible, between malignant and benign masses, to define the location and extent of spread of the lesion and to monitor and assess...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics