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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Near-field thermoacoustic tomography of small animals.
Phys. Med. Biol. 56, 3433-3444 (2011)
Near-field radiofrequency thermoacoustic (NRT) tomography is a new imaging method that was developed to mitigate limitations of conventional thermoacoustic imaging approaches, related to hard compromises between signal strength and spatial resolution. By utilizing ultrahigh-energy electromagnetic impulses at ∼20 ns duration along with improved energy absorption coupling in the near-field, this method can deliver high-resolution images without compromising signal to noise ratio. NRT is a promising modality, offering cost-effectiveness and ease of implementation and it can be conveniently scaled to image small animals and humans. However, several of the performance metrics of the method are not yet documented. In this paper, we characterize the expected imaging performance via numerical simulations based on a finite-integration time-domain (FITD) technique and experiments using tissue mimicking phantoms and different biological samples. Furthermore, we show for the first time whole-body tomographic imaging results from mice, revealing clear anatomical details along with highly dissipative inclusions introduced for control. The best spatial resolution achieved for those experiments was 150 µm.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Biological tissues; Frequency-range; In-vivo; Aborption; MHZ; CT
ISSN (print) / ISBN
0031-9155
e-ISSN
1361-6560
Zeitschrift
Physics in Medicine and Biology
Quellenangaben
Band: 56,
Heft: 11,
Seiten: 3433-3444
Verlag
Institute of Physics Publishing (IOP)
Verlagsort
Bristol
Begutachtungsstatus
Peer reviewed