Evaluation of varian ix clinical linear accelerator performance based on daily quality assurance using quickcheck phantom
This study aims to evaluate the performance consistency of the Varian iX Clinical Linear Accelerator (LINAC) by analysing radiation output parameters using the PTW QUICKCHECK Phantom during daily quality assurance (QA) procedures at Hospital Pakar Universiti Sains Malaysia (HPUSM). The parameters...
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| Main Author: | |
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| Format: | Monograph |
| Language: | en |
| Published: |
Universiti Sains Malaysia
2025
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| Subjects: | |
| Online Access: | http://eprints.usm.my/63044/1/NURUL%20AFIQAH%20YUSNIMAN-E.pdf http://eprints.usm.my/63044/ |
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| Summary: | This study aims to evaluate the performance consistency of the Varian iX Clinical Linear
Accelerator (LINAC) by analysing radiation output parameters using the PTW
QUICKCHECK Phantom during daily quality assurance (QA) procedures at Hospital
Pakar Universiti Sains Malaysia (HPUSM). The parameters measured include central axis
dose (CAX), beam flatness, symmetry in the gantry-target (GT) and left-right (LR)
directions, and beam quality factor (BQF) for photon (6 MV) and electron beams (6, 9,
12, and 15 MeV). Data were collected over a three-month period from January to March
2025. All measurements were taken using a 10 × 10 cm² field size with 100 MU delivered
at a dose rate of 300 MU/min. Repeated measurements were conducted in cases of reading
errors, and any invalid data were excluded from the analysis. The results showed that all
radiation output parameters remained within the tolerance limits recommended by AAPM
TG-142 (±3%), indicating excellent output stability and machine performance. This
confirms the suitability of the QUICKCHECK device as a reliable and efficient tool for
routine daily QA in radiotherapy settings. |
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