Evaluation of scanner parameters on ebt 2 And ebt 3 film analysis
This study investigates the effects of scanner parameters properties to EBT 2 and EBT 3 films analysis irriadiation with photon and electron beam energy. The scanner parameters evaluated are interpretation (no invert, invert 8-bit scan, invert 16-bit scan), colour to grayscale transformation (Gafc...
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| Main Author: | |
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2016
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| Subjects: | |
| Online Access: | http://eprints.usm.my/61377/1/SITI%20NUR%20AMIRAH%20BINTI%20AZHAN%20-%20e.pdf http://eprints.usm.my/61377/ |
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| Summary: | This study investigates the effects of scanner parameters properties to EBT 2 and
EBT 3 films analysis irriadiation with photon and electron beam energy. The scanner
parameters evaluated are interpretation (no invert, invert 8-bit scan, invert 16-bit scan), colour to grayscale transformation (Gafchromic optimised and user-defined
transformation), flattening correction (no filter and median filter), film type (positive
and colour negative film), image type (bit colour and grayscale), and resolution (72 dpi,
300 dpi, 600 dpi). The EBT 2 and EBT 3 films were initially irradiated with photon and
electron beams of different energies (6 MV, 10 MV, 6 MeV and 9 MeV) using Siemens
Primus Linear Accelerator. After irriadiation, the films were then scanned using Epson
Expression 10000 XL flatbed using different scanning parameters. As a result, the
scanner flattening correction did not have any effects the optical density (OD) reading
of EBT 2 and EBT 3 films. However, the interpretation section of scanner parameter did
changes if invert 16-bit scan was used compared to similar reading obtained if invert 8- bit scan and standard parameter (no invert) were used. The OD of film type is significantly different than the standard parameter and the image type also affect the OD
value. The different parameter of resolution flatbed scanner gives almost consistent OD
value but changes to the higher resolution will increase the OD value. In conclusion, the
scanning parameters have significant effects on the films OD analysis and hence affect
the dose measured. |
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