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PATIENT EXPOSURE OPTIMISATION THROUGH TASK-BASED ASSESSMENT OF A NEW MODEL-BASED ITERATIVE RECONSTRUCTION TECHNIQUE
논문 개요
| 기관명 | NDSL |
|---|---|
| 저널명 | Radiation protection dosimetry |
| ISSN | 0144-8420, |
| ISBN |
논문저자 및 소속기관 정보
| 저자(한글) | Ott, Julien G.,Ba, Alexandre,Racine, Damien,Ryckx, Nick,Bochud, Francois O.,Alkadhi, Hatem,Verdun, Francis R. |
|---|---|
| 저자(영문) | |
| 소속기관 | |
| 소속기관(영문) | |
| 출판인 | |
| 간행물 번호 | |
| 발행연도 | 2016-01-01 |
| 초록 | The goal of the present work was to report and investigate the performances of a new iterative reconstruction algorithm, using a model observer. For that, a dedicated low-contrast phantom containing different targets was scanned at four volume computed tomography dose index (CTDI vol ) levels on a Siemens SOMATOM Force computed tomography (CT). The acquired images were reconstructed using the ADMIRE algorithm and were then assessed by three human observers who performed alternative forced choice experiments. Next, a channelised hotelling observer model was applied on the same set of images. The comparison between the two was performed using the percentage correct as a figure of merit. The results indicated a strong agreement between human and model observer as well as an improvement in the low-contrast detection when switching from an ADMIRE strength of 1 #x2013;3. Good results were also observed even in situations where the target was hard to detect, suggesting that patient dose could be further reduced and optimised. |
| 원문URL | http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=03553784&target=NART&cn=NART75736780 |
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