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KMID : 0384620060170030173
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Korean Journal of Medical Physics
2006 Volume.17 No. 3 p.173 ~ p.178
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Effective Dose Evaluation using Clinical PET/CT Acquisition Protocols
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Nam So-Ra
Son Hye-Hyung
Lee Sang-Hun
Lee Chang-Re
Jo Hyu-Min
Kim Hee-Joung
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Abstract
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The purpose of this study was to evaluate the radiation dose for clinical PET/CT protocols in clinical environments using Alderson phantom and TLDs. Radiation doses were evaluated for both Philips GEMINI 16 slice PET/CT system and GE DSTe 16 slice PET/CT system. Specific organ doses with transmission scan, high quality CT scan and topogram in philips GEMINI PET/CT system were measured. Specific organ doses with CT scan for attenuation map, CT scan for diagnosis and topogram in GE DSTe PET/CT system were also measured. The organs were selected based on ICRP60 recommendation. The TLDs used for measurements were selected for within an accuracy of and calibrated in 10 MV X-ray radiation field. The effective doses for transmission scan, high qualify scan, and topogram in Philips GEMINI PET/CT system were respectively. The effective doses for CT scan to make attenuation map, CT scan to diagnose and topogram in GE DSTe PET/CT system were respectively. We evaluated the total effective dose by adding effective dose for PET Image. The total PET/CT doses for Philips GEMINI PET/CT (Topogram+ transmission scan+PET, Topogram+high qualify CT+PET) and GE DSTe PET/CT (Topogram +CT for attenuation map+ PET, Topogram+diagnostic CT+ PET) are respectively. Further study may be needed to be peformed to find optimal PET/CT acquisition protocols for reducing the patient exposure with good image qualify.
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KEYWORD
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Whole body PET/CT, TLD, Radiation effective dose dosimetry
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