Project Details
Abstract
The purpose of this two-year project is to estimate the image quality and to assess
patient-specific doses and risks for organ-based tube current modulation (OBTCM). The
patient-specific dose and image quality will be assessed according to clinical situations. The
dose reduction methods for routine CT examinations will be implemented in this study.
Conventional tube current modulation (TCM) is only to modulate the tube current
according patient attenuation. However, the dose of radiosensitive organ within scan range
remains not considered. Three methods for organ-based dose reduction methods are
organ-based tube current modulation, in-plane shielding, and copper foil beam filtration.
These three methods could reduce the radiation dose to superficial organs, such as eye lens
and breasts when a patient undergoes a head or chest examination. According the standard
procedure records during three kinds of CT patient examinations, specific patient models for
organ-based tube current modulation, in-plane shielding, and copper foil beam filtration, will
be implemented into Monte Carlo simulation system to calculate the organ doses, effective
dose, and risks. The optimized standard procedure for organ-based dose reduction methods
will be offered to clinic staffs.
The preliminary results of this project were also included in this proposal. We found that
OBTCM could reduce by 22% the dose to the eyes, and the image quality kept almost the
same. In phantoms placed at off-centre positions, OBTCM increased by some 18% the dose
to the eyes and doubled superficial dose to the breast in phantoms shifted downwards. The
results have been published in SCI journals.
Project IDs
Project ID:PC10308-1027
External Project ID:MOST103-2314-B182-009-MY2
External Project ID:MOST103-2314-B182-009-MY2
Status | Finished |
---|---|
Effective start/end date | 01/08/14 → 31/07/15 |
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