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Visual-spatial ability and interpretation of three-dimensional information in radiographs
Umeå University, Faculty of Medicine, Odontology.
Umeå University, Faculty of Social Sciences, Department of Psychology.
Umeå University, Faculty of Medicine, Odontology, Oral and Maxillofacial Radiology. Oral diagnostisk radiologi.
2007 (English)In: Dento-Maxillo-Facial Radiology, ISSN 0250-832X, Vol. 36, 86-91 p.Article in journal (Refereed) Published
Abstract [en]

Objectives: To investigate whether skill in the interpretation of three-dimensional (3D) information in radiographs utilizing the parallax phenomenon is associated with visual-spatial ability and whether development of this skill is related to visual-spatial ability.

Methods: Eighty-six individuals with a median age of 25 years participated in the study. It was organized into three parts: (1) assessment before training, (2) training in object depth localization utilizing parallax and (3) assessment after training. Before training, visual-spatial ability was assessed with a mental rotation test, MRT-A; skill in interpreting 3D information was assessed with two specifically designed proficiency tests: a radiography test, which assessed the ability to interpret 3D information in radiographs utilizing motion parallax and a principle test which assessed understanding of the principles of motion parallax. After training, skill in interpreting 3D information was reassessed. Improvement was defined as the difference between test scores after training and before training. Multiple linear regression was used to analyse the effect of student and training characteristics on proficiency test results and improvement.

Results: Radiography test results after training and improvement of radiography test results were significantly associated with MRT-A scores (P<0.001 and P=0.020, respectively). Principle test results were high before training and did not improve after training. The test results were associated with MRT-A both before (P=0.009) and after training (P=0.003).

Conclusions: Understanding of the parallax phenomenon is associated with visual-spatial ability. Development of the skill to interpret 3D information in radiographs utilizing parallax is facilitated for individuals with high visual-spatial ability.

Place, publisher, year, edition, pages
2007. Vol. 36, 86-91 p.
Keyword [en]
space perception; radiography; regression analysis
National Category
Dentistry
Identifiers
URN: urn:nbn:se:umu:diva-17876DOI: doi:10.1259/dmfr/56593635PubMedID: 17403885OAI: oai:DiVA.org:umu-17876DiVA: diva2:157549
Available from: 2008-01-23 Created: 2008-01-23Bibliographically approved
In thesis
1. Simulation supported training in oral radiology: methods and impact on interpretative skill
Open this publication in new window or tab >>Simulation supported training in oral radiology: methods and impact on interpretative skill
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Simulation is an important tool when training is hazardous, time consuming, or expensive. Simulation can also be used to enhance reality by adding features normally not available in the real world. The aim with this work has been to develop and evaluate methods that could improve learning in oral radiology utilising a radiation-free simulator environment.

Virtual reality software for radiographic examinations was developed. The virtual environment consisted of a model of a patient, an x-ray machine, and a film. Simulated radiographic images of the patient model could be rendered as perspective projections based on the relative position between the individual models. The software was incorporated in an oral radiology simulator with a training program for interpretation of spatial relations in radiographs. Projection geometry was validated by comparing length dimensions in simulated radiographs with the corresponding theoretically calculated distances. The results showed that projection error in the simulated images never exceeded 0.5 mm.

Dental students participated in studies on skill in interpreting spatial information in radiographs utilising parallax. Conventional and simulator based training methods were used. Training lasted for 90 minutes. Skill in interpreting spatial information was assessed with a proficiency test before training, immediately after training, and eight months after training. Visual-spatial ability was assessed with mental rotations test, version A (MRT-A). Regression analysis revealed a significant (P<0.01) association between visual-spatial ability and proficiency test results after training. At simulator training, proficiency test results immediately after training were significantly higher than before training (P<0.01). Among students with low MTR-A scores, improvement after simulator training was higher than after conventional training. Eight months after simulator training proficiency test results were lower than immediately after training. The test results were, however, still higher than before training.

In conclusion, the simulation software produces simulated radiographs of high geometric accuracy. Acquisition of skill to interpret spatial relations in radiographs is facilitated for individuals with high visual-spatial ability. Simulator training improves acquisition of interpretative skill and is especially beneficial for individuals with low visual-spatial ability. The results indicate that radiology simulation can be an effective training method.

Place, publisher, year, edition, pages
Umeå: Odontologi, 2007. 52 p.
Series
Umeå University odontological dissertations, ISSN 0345-7532 ; 99
Keyword
Virtual reality, simulation, simulator, radiology, radiography, learning, skill acquisition, visual-spatial ability, parallax
National Category
Radiology, Nuclear Medicine and Medical Imaging
Research subject
Odontology
Identifiers
urn:nbn:se:umu:diva-1118 (URN)978-91-7264-293-5 (ISBN)
Public defence
2007-05-25, Sal B, 1D, Tandläkarhögskolan, 9 tr, Umeå, 09:00 (English)
Opponent
Supervisors
Available from: 2007-05-08 Created: 2007-05-08 Last updated: 2009-06-15Bibliographically approved

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Nilsson, ToreHedman, LeifAhlqvist, Jan

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