Validation of the Rotation Ratios Method

Foss, O. A.; Klaksvik, J.; Benum, P.; Anda, S.
August 2007
Acta Radiologica;Aug2007, Vol. 48 Issue 6, p658
Academic Journal
Background: The rotation ratios method describes rotations between pairs of sequential pelvic radiographs. The method seems promising but has not been validated. Purpose: To validate the accuracy of the rotation ratios method. Material and Methods: Known pelvic rotations between 165 radiographs obtained from five skeletal pelvises in an experimental material were compared with the corresponding calculated rotations to describe the accuracy of the method. The results from a clinical material of 262 pelvic radiographs from 46 patients defined the ranges of rotational differences compared. Repeated analyses, both on the experimental and the clinical material, were performed using the selected reference points to describe the robustness and the repeatability of the method. Results: The reference points were easy to identify and barely influenced by pelvic rotations. The mean differences between calculated and real pelvic rotations were 0.0° (SD 0.6) for vertical rotations and 0.1° (SD 0.7) for transversal rotations in the experimental material. The intra- and interobserver repeatability of the method was good. Conclusion: The accuracy of the method was reasonably high, and the method may prove to be clinically useful.


Related Articles

  • Pelvic Rotations: A Pelvic Phantom Study. Foss, O. A.; Klaksvik, J.; Benum, P.; Anda, S. // Acta Radiologica;Aug2007, Vol. 48 Issue 6, p650 

    Background: Radiographic measurements made on standard pelvic radiographs are commonly used in studying conditions related to the hip joints. Effects caused by variations in pelvic orientation may be a source of error in comparing measurements between sequential radiographs. Purpose: To define...

  • Comparison of effective doses obtained from dose-area product and air kerma measurements in interventional radiology. Bor D; Sancak T; Olgar T; Elcim Y; Adanali A; Sanlidilek U; Akyar S // British Journal of Radiology;Apr2004, Vol. 77 Issue 916, p315 

    In this study, measurements of dose-area product (DAP) and entrance dose were carried out simultaneously in a sample of 162 adult patients who underwent different interventional examinations. Effective doses for each measurement technique were estimated using the conversion factors that have...

  • URETHROGRAPHY, RETROGRADE. Schnell, Zoanne Burgess; Van Leeuwen, Anne M.; Kranpitz, Todd R. // Davis's Comprehensive Handbook of Laboratory & Diagnostic Tests ;Jan2003, p989 

    Presents a guide to retrograde urethrography. Procedure; Clinical indications; Interfering factors; Nursing implications.

  • What is the recommended approach to asymptomatic patients who develop a reactive PPD? Sharma, Umang; Morris, Carl; Safranek, Sarah; Guthmann, Richard // Journal of Family Practice;Feb2006, Vol. 55 Issue 2, p163 

    The article discusses the approach recommended for patients with no symptoms of illness or disease who develop a reactive purified protein derivative (PPD). For asymptomatic patients with a positive PPD test result, clinical evaluation and chest x-ray are recommended to exclude the slight...

  • Vessel size estimation in peripheral artery interventions: are angiographic measurements reliable? Stenström, Hugo; Knutsson, Anders; Smedby, Örjan; Stenström, Hugo; Smedby, Orjan // Acta Radiologica;Apr2005, Vol. 46 Issue 2, p163 

    Purpose: To describe and evaluate a new technique for angiographic measurement of arterial diameters and to make a comparison with other common techniques. Material and Methods: The Angiometer has a radiopaque metal body with six cylindrical segments of varying...

  • Carotid artery stenosis: reproducibility of automated 3D CT angiography analysis method. Zishu Zhang; Berg, Marja H.; Ikonen, Aki E. J.; Vanninen, Ritva L.; Manninen, Hannu I. // European Radiology;Apr2004, Vol. 14 Issue 4, p665 

    The aim of this study was to assess the reproducibility and anatomical accuracy of automated 3D CT angiography analysis software in the evaluation of carotid artery stenosis with reference to rotational DSA (rDSA). Seventy-two vessels in 36 patients with symptomatic carotid stenosis were...

  • Electromagnetic field-based navigation for percutaneous punctures on C-arm CT: experimental evaluation and clinical application. Meyer, Bernhard C.; Peter, Olaf; Nagel, Markus; Hoheisel, Martin; Frericks, Bernd B.; Wolf, Karl-Jürgen; Wacker, Frank K. // European Radiology;Dec2008, Vol. 18 Issue 12, p2855 

    The aim of this study was to prospectively evaluate the needle visualization and placement error and use of an electromagnetic field-based tracking navigation device for puncture procedures based on C-arm CT (CACT) images. A commercially available navigation device was mounted on an angiographic...

  • Correlation of optical coherence tomography, with or without additional colour fundus photography, with stereo fundus fluorescein angiography in diagnosing choroidal neovascular membrances. Sandhu, S. S.; Talks, S. J. // British Journal of Ophthalmology;Aug2005, Vol. 89 Issue 8, p967 

    Aims: To assess the diagnostic accuracy of optical coherence tomography (OCT), with/without colour fundus photographs, in predicting fundus fluorescein angiography (FFA) findings in patients suspected of havingchoroidal neovascularisation (CNV). Methods: A consecutive series of patients...

  • Early response monitoring to neoadjuvant chemotherapy in osteosarcoma using sequential F-FDG PET/CT and MRI. Byun, Byung; Kong, Chang-Bae; Lim, Ilhan; Kim, Byung; Choi, Chang; Song, Won; Cho, Wan; Jeon, Dae-Geun; Koh, Jae-Soo; Lee, Soo-Yong; Lim, Sang // European Journal of Nuclear Medicine & Molecular Imaging;Aug2014, Vol. 41 Issue 8, p1553 

    Purpose: We evaluated the potential of sequential fluorine-18 fluorodeoxyglucose ( F-FDG) positron emission tomography (PET)/computed tomography (CT) and MRI (PET/MRI) after one cycle of neoadjuvant chemotherapy to predict a poor histologic response in osteosarcoma. Methods: A prospective study...


Read the Article


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

Try another library?
Sign out of this library

Other Topics