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논문 기본정보
Pin-photodiode array for the measurement of fan-beam energy and air kerma distributions of X-ray CT scanners
논문 개요
| 기관명 | NDSL |
|---|---|
| 저널명 | Physica medica : European journal of medical physics |
| ISSN | 1120-1797,1724-191x |
| ISBN |
논문저자 및 소속기관 정보
| 저자(한글) | Haba, T.,Koyama, S.,Aoyama, T.,Kinomura, Y.,Ida, Y.,Kobayashi, M.,Kameyama, H.,Tsutsumi, Y. |
|---|---|
| 저자(영문) | |
| 소속기관 | |
| 소속기관(영문) | |
| 출판인 | |
| 간행물 번호 | |
| 발행연도 | 2016-01-01 |
| 초록 | Purpose: Patient dose estimation in X-ray computed tomography (CT) is generally performed by Monte Carlo simulation of photon interactions within anthropomorphic or cylindrical phantoms. An accurate Monte Carlo simulation requires an understanding of the effects of the bow-tie filter equipped in a CT scanner, i.e. the change of X-ray energy and air kerma along the fan-beam arc of the CT scanner. To measure the effective energy and air kerma distributions, we devised a pin-photodiode array utilizing eight channels of X-ray sensors arranged at regular intervals along the fan-beam arc of the CT scanner. Methods: Each X-ray sensor consisted of two plate type of pin silicon photodiodes in tandem - front and rear photodiodes - and of a lead collimator, which only allowed X-rays to impinge vertically to the silicon surface of the photodiodes. The effective energy of the X-rays was calculated from the ratio of the output voltages of the photodiodes and the dose was calculated from the output voltage of the front photodiode using the energy and dose calibration curves respectively. Results: The pin-photodiode array allowed the calculation of X-ray effective energies and relative doses, at eight points simultaneously along the fan-beam arc of a CT scanner during a single rotation of the scanner. Conclusions: The fan-beam energy and air kerma distributions of CT scanners can be effectively measured using this pin-photodiode array. |
| 원문URL | http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=03553784&target=NART&cn=NART76039500 |
| 첨부파일 |
추가정보
| 과학기술표준분류 | |
|---|---|
| ICT 기술분류 | |
| DDC 분류 | |
| 주제어 (키워드) | X-ray CT,Fan-beam energy,Pin-photodiode X-ray sensor |