書誌事項
- タイトル別名
-
- A New Method of Measuring Temporal Resolution for Computed Tomography
- CT ニ オケル ジカン ブンカイノウ ノ アタラシイ ソクテイホウ
この論文をさがす
説明
In this study, we proposed a new method of measuring temporal resolution using an impulse signal in the time domain in computed tomography (CT). We employed a metal ball with a diameter of 11 mm as the source of the impulse signal, which was shot to a slice plane at a very fast speed during scanning, along the perpendicular direction to the plane. A 4-slice multi detector-row CT (MDCT) system was employed to evaluate the new method, and images for region of interest (ROI) measurement were reconstructed with a z-increment corresponding to a very short time (≤ 0.03 sec). Temporal sensitivity profiles (TSPs) for various helical beam-pitches were obtained by plotting averaged CT values within the ROIs against the temporal axis. The accuracy of the method was examined by comparing the measured TSPs with theoretical TSPs corresponding to respective helical beam-pitches. As a result, the theoretical TSPs and measured TSPs demonstrated high coincidence in all beam-pitches. Since the TSPs indicated the profiles with sharp shapes faithful to the theoretical TSPs, it was proved that the new method had sufficient inherent temporal resolution. It was indicated that the new method we proposed would be an effective method for evaluating temporal resolution in CT.
収録刊行物
-
- 日本放射線技術学会雑誌
-
日本放射線技術学会雑誌 64 (9), 1172-1176, 2008
公益社団法人 日本放射線技術学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282681339054976
-
- NII論文ID
- 110007068972
-
- NII書誌ID
- AN00197784
-
- ISSN
- 18814883
- 03694305
-
- NDL書誌ID
- 9661504
-
- PubMed
- 18840955
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDLサーチ
- Crossref
- CiNii Articles
- OpenAIRE
-
- 抄録ライセンスフラグ
- 使用不可
