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Improvement of the cine‐CT based 4D‐CT imaging
Author(s) -
Pan Tinsu,
Sun Xiaojun,
Luo Dershan
Publication year - 2007
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2794225
Subject(s) - maximum intensity projection , feature (linguistics) , nuclear medicine , projection (relational algebra) , multislice , medical imaging , computer science , medicine , artificial intelligence , computer vision , radiology , angiography , algorithm , philosophy , linguistics
An improved 4D‐CT utility has been developed on the GE LightSpeed multislice CT (MSCT) and Discovery PET/CT scanners, which have the cine CT scan capability. Two new features have been added in this 4D‐CT over the commercial Advantage 4D‐CT from GE. One feature was a new tool for disabling parts of the respiratory signal with irregular respiration and improving the accuracy of phase determination for the respiratory signal from the Varian real‐time positioning and monitoring (RPM) system before sorting of the cine CT images into the 4D‐CT images. The second feature was to allow generation of the maximum‐intensity‐projection (MIP), average (AVG) and minimum‐intensity‐projection (mip) CT images from the cine CT images without a respiratory signal. The implementation enables the assessment of tumor motion in treatment planning with the MIP, AVG, and mip CT images on the GE MSCT and PET/CT scanners without the RPM and the Advantage 4D‐CT with a GE Advantage windows workstation. Several clinical examples are included to illustrate this new application.