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ファイル | 記述 | サイズ | フォーマット | |
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j.jmr.2010.11.017.pdf | 188.37 kB | Adobe PDF | 見る/開く |
タイトル: | Noise reduction by dynamic signal preemphasis. |
著者: | Takeda, Kazuyuki https://orcid.org/0000-0002-6743-0932 (unconfirmed) Takegoshi, K https://orcid.org/0000-0002-4613-2987 (unconfirmed) |
著者名の別形: | 武田, 和行 |
キーワード: | Noise reduction Dynamic range Digitization noise Preemphasis Apodization |
発行日: | Feb-2011 |
出版者: | Elsevier Inc. |
誌名: | Journal of magnetic resonance |
巻: | 208 |
号: | 2 |
開始ページ: | 305 |
終了ページ: | 308 |
抄録: | In this work we propose an approach to reduce the digitization noise for a given dynamic range, i.e., the number of bits, of an analog to digital converter used in an NMR receiver. In this approach, the receiver gain is dynamically increased so that the free induction decay is recorded in such an emphasized way that the decaying signal is digitized using as many number of bits as possible, and at the stage of data processing, the original signal profile is restored by applying the apodization that compensates the effect of the preemphasis. This approach, which we call APodization after Receiver gain InCrement during Ongoing sequence with Time (APRICOT), is performed in a solid-state system containing a pair of (13)C spins, one of which is fully isotopically labeled and the other is naturally abundant. It is demonstrated that the exceedingly smaller peak buried in the digitization noise in the conventional approach can be revealed by employing APRICOT. |
著作権等: | © 2010 Elsevier Inc. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/137555 |
DOI(出版社版): | 10.1016/j.jmr.2010.11.017 |
PubMed ID: | 21177130 |
出現コレクション: | 学術雑誌掲載論文等 |
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