LEADER 03203nam 2200421 450 001 9910571741003321 005 20230516232953.0 035 $a(CKB)5860000000047161 035 $a(NjHacI)995860000000047161 035 $a(EXLCZ)995860000000047161 100 $a20230516d2013 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aDevelopment of novel ultrasound techniques for imaging and elastography $efrom simulation to real-time implementation /$fAlessandro Ramalli 210 1$aFirenze, Italy :$cFirenze University Press,$d[2013] 210 4$dİ2013 215 $a1 online resource (119 pages) $cillustrations 225 1 $aPremio Tesi di dottorato 311 $a88-927-3469-5 320 $aIncludes bibliographical references. 327 $aIntroduction -- Contributions -- 1. Ultrasound Basics -- 1.1. Ultrasound propagation -- 1.2. Transducers and probes -- 1.3. Echo-signal elaboration -- 1.4. Open issues in ultrasound investigation -- 2. ULA-OP -- 2.1. Introduction -- 2.2. System description -- 2.3. Examples of non-standard application -- 2.4. High Frame Rate Imaging -- 2.5. Expansion capabilities and future work -- 3. Novel Ultrasound Simulation Methods -- 3.1. Field simulation in homogeneous linear media: Simag -- 3.2. Field simulation in nonlinear media: GASM -- 4. A Novel Ultrasound Experimental Method: Frequency Domain Elastography -- 4.1. Introduction -- 4.2. Methods -- 4.3. Computational cost analysis and reduction -- 4.4. Computer-guided compression experiments -- 4.5. Freehand compression experiments -- 4.6. Real-time implementation -- 4.7. Discussion and conclusion -- 5. Novel Ultrasound Experimental Methods: Work in Progress -- 5.1. 2D HFR color vector Doppler -- 5.2. Adaptive beamforming through layered structures -- 5.3. Pulse compression -- 6. Conclusion -- Bibliography. 330 $aUltrasound techniques offer many advantages, in terms of ease of realization and patients' safety. The availability of suitable hardware and software tools is condicio sine qua non for new methods testing. This PhD project addresses medical ultrasound signal processing and seeks to achieve two scientific goals: the first is to contribute to the development of an ultrasound research platform, while the second is introducing and validating, through this platform, non-standard methods. During the thesis, the capabilities of the system were improved by creating advanced software tools, such as acoustic field simulators, and by developing echo-signals elaboration programs. In particular, a novel technique for quasi-static elastography was developed, in-vitro tested and implemented in real-time. 410 0$aPremio Tesi di dottorato. 606 $aUltrasonic imaging 606 $aElastography 615 0$aUltrasonic imaging. 615 0$aElastography. 676 $a616.07543 700 $aRamalli$b Alessandro$f1983-$01357355 801 0$bNjHacI 801 1$bNjHacl 906 $aBOOK 912 $a9910571741003321 996 $aDevelopment of novel ultrasound techniques for imaging and elastography$93363196 997 $aUNINA