Baharudin, Muhammad Firdaus
(2015)
Comparison of CT number between conventional CT and ImaSim software.
Project Report.
Pusat Pengajian Sains Kesihatan, Universiti Sains Malaysia.
(Submitted)
Abstract
This study determines the suitability of ImaSim CT simulation software, as CT Image generation
and analysis. CT images of various tissues are obtained by using conventional CT and the CT
simulation software. The value of CT number of various tissues which represents the tissue's
density is compared between conventional CT method and ImaSim software. To obtain the CT
image conventionally, CIRS 062 Electron Density CT Phantom was used and 5 plug phantoms
were used which are air, lung exhale, adipose, water and dense bone (1000 mglcc HA). The same
types of tissues were used to simulate in the CT simulation software ImaSim and all the CT
numbers were recorded. Both conventional and simulation method uses fixed tube current-time
product at 260 mAs at three different energy which are 80 kVp, 120 kVp and 140 kVp. The
value of CT number obtained for conventional CT and ImaSim software is in the acceptable
range of CT numbers of each specific tissues. The chi-square calculated gives low value for air,
fat and water which is less than 2.98. Chi-square value for lung and bone gives high value which
is up to 200. Therefore the accuracy of CT number obtained from ImaSim software specifically
for lung and bone is questionable as the value is deviated from the standard value and the CT
number obtained conventionally.
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