TY - JOUR
T1 - Human-computer interaction in radiotherapy target volume delineation
T2 - A prospective, multi-institutional comparison of user input devices
AU - Rasch, Coen R.N.
AU - Duppen, Joop C.
AU - Steenbakkers, Roel J.
AU - Baseman, Daniel
AU - Eng, Tony Y.
AU - Fuller, Clifton D.
AU - Harris, Anna M.
AU - Jones, William E.
AU - Li, Ying
AU - Maani, Elizabeth
AU - Nguyen, Dominic D.
AU - Swanson, Gregory P.
AU - Bicquart, Celine
AU - Gagnon, Patrick
AU - Holland, John
AU - McDonald, Tasha
AU - Thomas, Charles R.
AU - Wang, Samuel J.
AU - Fuss, Martin
AU - Sharp, Hadley J.
AU - Ludwig, Michelle
AU - Rosenthal, David I.
AU - Diaz, Aidnag Z.
AU - Demandante, Carlo G.N.
AU - Shapiro, Ronald
PY - 2011/10
Y1 - 2011/10
N2 - The purpose of this study was the prospective comparison of objective and subjective effects of target volume region of interest (ROI) delineation using mouse- keyboard and pen-tablet user input devices (UIDs). The study was designed as a prospective test/retest sequence, with Wilcoxon signed rank test for matchedpair comparison. Twenty-one physician-observers contoured target volume ROIs on four standardized cases (representative of brain, prostate, lung, and head and neck malignancies) twice: once using QWERTY keyboard/ scroll-wheel mouse UID and once with pen-tablet UID (DTX2100, Wacom Technology Corporation, Vancouver, WA, USA). Active task time, ROI manipulation task data, and subjective survey data were collected. One hundred twenty-nine target volume ROI sets were collected, with 62 paired pen-tablet/mouse-keyboard sessions. Active contouring time was reduced using the pen-tablet UID, with mean ± SD active contouring time of 26±23 min, compared with 32±25 with the mouse (p=0.01). Subjective estimation of time spent was also reduced from 31±26 with mouse to 27±22 min with the pen (p=0.02). Task analysis showed ROI correction task reduction (p=0.045) and decreased panning and scrolling tasks (p<0.01) with the pen-tablet; drawing, window/ level changes, and zoom commands were unchanged (p= n.s.) Volumetric analysis demonstrated no detectable differences in ROI volume nor intra- or inter-observer volumetric coverage. Fifty-two of 62 (84%) users preferred the tablet for each contouring task; 5 of 62 (8%) denoted no preference, and 5 of 62 (8%) chose the mouse interface. The pen-tablet UID reduced active contouring time and reduced correction of ROIs, without substantially altering ROI volume/coverage.
AB - The purpose of this study was the prospective comparison of objective and subjective effects of target volume region of interest (ROI) delineation using mouse- keyboard and pen-tablet user input devices (UIDs). The study was designed as a prospective test/retest sequence, with Wilcoxon signed rank test for matchedpair comparison. Twenty-one physician-observers contoured target volume ROIs on four standardized cases (representative of brain, prostate, lung, and head and neck malignancies) twice: once using QWERTY keyboard/ scroll-wheel mouse UID and once with pen-tablet UID (DTX2100, Wacom Technology Corporation, Vancouver, WA, USA). Active task time, ROI manipulation task data, and subjective survey data were collected. One hundred twenty-nine target volume ROI sets were collected, with 62 paired pen-tablet/mouse-keyboard sessions. Active contouring time was reduced using the pen-tablet UID, with mean ± SD active contouring time of 26±23 min, compared with 32±25 with the mouse (p=0.01). Subjective estimation of time spent was also reduced from 31±26 with mouse to 27±22 min with the pen (p=0.02). Task analysis showed ROI correction task reduction (p=0.045) and decreased panning and scrolling tasks (p<0.01) with the pen-tablet; drawing, window/ level changes, and zoom commands were unchanged (p= n.s.) Volumetric analysis demonstrated no detectable differences in ROI volume nor intra- or inter-observer volumetric coverage. Fifty-two of 62 (84%) users preferred the tablet for each contouring task; 5 of 62 (8%) denoted no preference, and 5 of 62 (8%) chose the mouse interface. The pen-tablet UID reduced active contouring time and reduced correction of ROIs, without substantially altering ROI volume/coverage.
KW - Human-computer interaction
KW - Imaging informatics
KW - Observer performance
KW - Observer variation
KW - Radiation oncology
KW - Radiotherapy
KW - User interface
KW - User-computer interface
KW - Workflow
KW - Workflow reengineering
UR - http://www.scopus.com/inward/record.url?scp=84855593879&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855593879&partnerID=8YFLogxK
U2 - 10.1007/s10278-010-9341-2
DO - 10.1007/s10278-010-9341-2
M3 - Review article
C2 - 20978922
AN - SCOPUS:84855593879
VL - 24
SP - 794
EP - 803
JO - Journal of Digital Imaging
JF - Journal of Digital Imaging
SN - 0897-1889
IS - 5
ER -