Final published version
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Searching in axial and 3D CT visualisations
AU - Phillips, Peter
AU - Manning, David
AU - Crawford, Trevor
AU - Burling, David
AU - Tam, Chi Leung
AU - Taylor, Alasdair
PY - 2008/6/18
Y1 - 2008/6/18
N2 - Traditional diagnostic modalities have been, for the most part, static two-dimensional images displayed on film or computer screen. More recent diagnostic modalities are solely computer-based and consist of large data-sets of multiple images. Image perception and visual search using these new modalities are complicated by the need to interact with the computer in order to navigate through the data. This paper reports the late-breaking results from two small studies into visual search within two types of CT Colonography (CTC) visualisations. The twelve novice observers in the study were taking part in a week-long course in CTC and were tested at the beginning and end of the course. A number of expert observers were also recorded. The two visualisations used in the study were 2D axial view and 3D colon fly-through. In both cases, searching was performed by inspecting the colon wall, but by two distinct mechanisms. The first study recorded observer eye-gaze and image navigation in a CTC axial view. The search strategy was to follow the lumen of the colon and detect abnormalities in the colon wall. The observer used the physical computer interface to navigate through the set of axial images to perform this task. The 3D fly-through study recorded observer eye-gaze whilst watching a recording of a computed flight through the colon lumen. Unlike the axial view there was no computer control, so inspection of the colon surface was dictated by the speed of flight through the colon.
AB - Traditional diagnostic modalities have been, for the most part, static two-dimensional images displayed on film or computer screen. More recent diagnostic modalities are solely computer-based and consist of large data-sets of multiple images. Image perception and visual search using these new modalities are complicated by the need to interact with the computer in order to navigate through the data. This paper reports the late-breaking results from two small studies into visual search within two types of CT Colonography (CTC) visualisations. The twelve novice observers in the study were taking part in a week-long course in CTC and were tested at the beginning and end of the course. A number of expert observers were also recorded. The two visualisations used in the study were 2D axial view and 3D colon fly-through. In both cases, searching was performed by inspecting the colon wall, but by two distinct mechanisms. The first study recorded observer eye-gaze and image navigation in a CTC axial view. The search strategy was to follow the lumen of the colon and detect abnormalities in the colon wall. The observer used the physical computer interface to navigate through the set of axial images to perform this task. The 3D fly-through study recorded observer eye-gaze whilst watching a recording of a computed flight through the colon lumen. Unlike the axial view there was no computer control, so inspection of the colon surface was dictated by the speed of flight through the colon.
KW - Eye tracking
KW - Human computer interaction
KW - Virtual colonoscopy
KW - Visual search
U2 - 10.1117/12.790424
DO - 10.1117/12.790424
M3 - Conference contribution/Paper
AN - SCOPUS:44949149260
SN - 9780819471017
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Medical Imaging 2008 - Image Perception, Observer Performance, and Technology Assessment
T2 - Medical Imaging 2008 - Image Perception, Observer Performance, and Technology Assessment
Y2 - 20 February 2008 through 21 February 2008
ER -