TY - JOUR
T1 - The electronic view box
T2 - A software tool for radiation therapy treatment verification
AU - Bosch, Walter R.
AU - Low, Daniel A.
AU - Gerber, Russell L.
AU - Michalski, Jeff M.
AU - Graham, Mary V.
AU - Perez, Carlos A.
AU - Harms, William B.
AU - Purdy, James A.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - Purpose: We have developed a software tool for interactively verifying treatment plan implementation. The Electronic View Box (EVB) too copies the paradigm of current practice but does so electronically. A portal image (online portal image or digitized port film) is displayed side by side with a prescription image (digitized simulator fiml or digitally reconstructed radiograph). The user can measure distances between features in prescription and portal images and "write" on the display, either to approve the image or to indicate required corrective actions. The EVB tool also provides several features not available in conventional verification practice using a light box. Methods and Materials: The EVB tool has been written in ANSI C using the X window system. The tool makes use of the Virtual Machine Platform and Foundation Library specifications of the NCI-sponsored Radiation Therapy Planning Tools Collaborative Working Group for portability into an arbitrary treatment planning system that conforms to these specifications. The present EVB tool is based on an earlier Verification Image Review tool, but with a substantial redesign of the user interface. A graphical user interface prototyping system was used in interatively refining the tool layout to allow rapid modifications of the interface in response to user comments. Results: Features of the EVB tool include 1) heirarchical selection of digital portal images based on physician name, patient name, and field identifier; 2) side-by-side presentation of prescription and portal images at equal magnification and orientation, and with independent grayscale controls; 3) "trace" facility for outlining anatomical structures; 4) "ruler" facility for measuring distances; 5) zoomed display of corresponding regions in both images; 6) image contrast enhancement; and 7) communication of portal image evaluation results (approval, block modification, repeat image acquisition, etc.). Conclusion: The EVB tool facilities the rapid comparison of prescription and portal images and permits electronic communication of corrections in port shape and positioning.
AB - Purpose: We have developed a software tool for interactively verifying treatment plan implementation. The Electronic View Box (EVB) too copies the paradigm of current practice but does so electronically. A portal image (online portal image or digitized port film) is displayed side by side with a prescription image (digitized simulator fiml or digitally reconstructed radiograph). The user can measure distances between features in prescription and portal images and "write" on the display, either to approve the image or to indicate required corrective actions. The EVB tool also provides several features not available in conventional verification practice using a light box. Methods and Materials: The EVB tool has been written in ANSI C using the X window system. The tool makes use of the Virtual Machine Platform and Foundation Library specifications of the NCI-sponsored Radiation Therapy Planning Tools Collaborative Working Group for portability into an arbitrary treatment planning system that conforms to these specifications. The present EVB tool is based on an earlier Verification Image Review tool, but with a substantial redesign of the user interface. A graphical user interface prototyping system was used in interatively refining the tool layout to allow rapid modifications of the interface in response to user comments. Results: Features of the EVB tool include 1) heirarchical selection of digital portal images based on physician name, patient name, and field identifier; 2) side-by-side presentation of prescription and portal images at equal magnification and orientation, and with independent grayscale controls; 3) "trace" facility for outlining anatomical structures; 4) "ruler" facility for measuring distances; 5) zoomed display of corresponding regions in both images; 6) image contrast enhancement; and 7) communication of portal image evaluation results (approval, block modification, repeat image acquisition, etc.). Conclusion: The EVB tool facilities the rapid comparison of prescription and portal images and permits electronic communication of corrections in port shape and positioning.
KW - Electronic portal imaging
KW - Image display
KW - Radiation therapy
KW - Treatment verification
UR - http://www.scopus.com/inward/record.url?scp=0028859799&partnerID=8YFLogxK
U2 - 10.1016/0360-3016(95)92197-8
DO - 10.1016/0360-3016(95)92197-8
M3 - Article
C2 - 7995744
AN - SCOPUS:0028859799
SN - 0360-3016
VL - 31
SP - 135
EP - 142
JO - International journal of radiation oncology, biology, physics
JF - International journal of radiation oncology, biology, physics
IS - 1
ER -