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Browsing Med - Theses by Subject "Radiation -- Measurement"

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Determination of field output correction factors in elongated small field photon beams

Mananchaya Vimolnoch (Chulalongkorn University, 2021)

IAEA along with AAPM have published a code of practice TRS 483 for small field dosimetry. The field correction output factors of various detectors were introduced to correct detector response changes in relative dosimetry. ...
Dosimetric properties of amorphous silicon electronic portal imaging device for verification of dynamic intensity modulated radiation therapy

Nuttakorn Preedasak (Chulalongkorn University, 2005)

The purpose of this study is to investigate the basic dosimetric characteristics of flat panel amorphous silicon (a-Si) detectors (aS500, Varian medical systems) for the possibility of using a Si portal imager for absolute ...
Organ doses in brain and body multidetector computed tomography examination

Ratirat Puekpuang (Chulalongkorn University, 2010)

Computed tomography (CT) examinations are an essential part of the diagnostic procedures in radiology. Multidetector CT (MDCT) is becoming more and more widespread due to advances in technology. Evaluation of radiation ...
Patient radiation dose and image quality in simple radiographic projections using computed radiography (CR) system : comparison the results between before and after the training

Sunee Lumlertdacha (Chulalongkorn University, 2008)

The purpose of this study is to determine the patient dose in clinical setting from the CR system while maintaining the image quality and the retake rate reduction. The data were collected from patients examined at two ...

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Browsing Med - Theses by Subject "Radiation -- Measurement"

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