Sökning: WFRF:(Nemeth E)
> (2005-2009) >
Model studies on se...
Model studies on segmental movement in lumbar spine using a semi-automated program for volume fusion
-
- Svedmark, Per (författare)
- Karolinska Institute, Department Orthopaed.
-
- Weidenhielm, Lars (författare)
- Karolinska Institutet
-
- Nemeth, Gunnar (författare)
- Karolinska Institute, Department of Molecular Medicine and Surgery
-
visa fler...
-
- Tullberg, Tycho (författare)
- Lowenstromska Sjukhuset, Stockholm Spine Ctr, Upplands Väsby, Sweden
-
- Noz, Marilyn E. (författare)
- New York University, Department of Radiology,Nuclear Medicine
-
- Maguire, Gerald Q. Jr. (författare)
- KTH,Kommunikationssystem, CoS
-
- Zeleznik, Michael P. (författare)
- Saya Systems Inc., Salt Lake City, UT, USA
-
- Olivecrona, Henrik (författare)
- Karolinska Institutet
-
visa färre...
-
Karolinska Institutet Karolinska Institute, Department Orthopaed (creator_code:org_t)
- London, UK : Informa Healthcare, 2008
- 2008
- Engelska.
-
Ingår i: Journal of Computer-Aided Surgery. - London, UK : Informa Healthcare. - 1092-9088 .- 1097-0150. ; 13:1, s. 14-22
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
http://kipublication...
-
visa färre...
Abstract
Ämnesord
Stäng
- Objective: To validate a new non-invasive CT method for measuring segmental translations in lumbar spine in a phantom using plastic vertebrae with tantalum markers and human vertebrae. Material and Methods: One hundred and four CT volumes were acquired of a phantom incorporating three lumbar vertebrae. Lumbar segmental translation was simulated by altering the position of one vertebra in all three cardinal axes between acquisitions. The CT volumes were combined into 64 case pairs, simulating lumbar segmental movement of up to 3 mm between acquisitions. The relative movement between the vertebrae was evaluated visually and numerically using a volume fusion image post-processing tool. Results were correlated to direct measurements of the phantom. Results: On visual inspection, translation of at least 1 mm or more could be safely detected and correlated with separation between the vertebrae in three dimensions. There were no significant differences between plastic and human vertebrae. Numerically, the accuracy limit for all the CT measurements of the 3D segmental translations was 0.56 mm (median: 0.12; range: -0.76 to +0.49 mm). The accuracy for the sagittal axis was 0.45 mm (median: 0.10; range: -0.46 to +0.62 mm); the accuracy for the coronal axis was 0.46 min (median: 0.09; range: -0.66 to +0.69 mm); and the accuracy for the axial axis was 0.45 mm (median: 0.05; range: -0.72 to +0.62 mm). The repeatability, calculated over 10 cases, was 0.35 mm (median: 0.16; range: -0.26 to +0.30 mm). Conclusion: The accuracy of this non-invasive method is better than that of current routine methods for detecting segmental movements. The method allows both visual and numerical evaluation of such movements. Further studies are needed to validate this method in patients.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Ortopedi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Orthopaedics (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Nyckelord
- lumbar spine
- volume fusion
- model study
- segmental movement
- total hip-arthroplasty
- flexion-extension
- motion
- ct
- repeatability
- accuracy
- SRA - ICT
- SRA - Informations- och kommunikationsteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas