Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging
In high frequency ultrasound imaging (HFUI), the quality of focusing is deeply related to the length of the depth of field (DOF). In this paper, a phase-inversion technique implemented by a dual-element transducer is proposed to enlarge the DOF. The performance of the proposed method was numerically...
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/14/8/14278 |
| _version_ | 1811185067934875648 |
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| author | Jong Seob Jeong |
| author_facet | Jong Seob Jeong |
| author_sort | Jong Seob Jeong |
| collection | DOAJ |
| description | In high frequency ultrasound imaging (HFUI), the quality of focusing is deeply related to the length of the depth of field (DOF). In this paper, a phase-inversion technique implemented by a dual-element transducer is proposed to enlarge the DOF. The performance of the proposed method was numerically demonstrated by using the ultrasound simulation program called Field-II. A simulated dual-element transducer was composed of a disc- and an annular-type elements, and its aperture was concavely shaped to have a confocal point at 6 mm. The area of each element was identical in order to provide same intensity at the focal point. The outer diameters of the inner and the outer elements were 2.1 mm and 3 mm, respectively. The center frequency of each element was 40 MHz and the f-number (focal depth/aperture size) was two. When two input signals with 0° and 180° phases were applied to inner and outer elements simultaneously, a multi-focal zone was generated in the axial direction. The total −6 dB DOF, i.e., sum of two −6 dB DOFs in the near and far field lobes, was 40% longer than that of the conventional single element transducer. The signal to noise ratio (SNR) was increased by about two times, especially in the far field. The point and cyst phantom simulation were conducted and their results were identical to that of the beam pattern simulation. Thus, the proposed scheme may be a potential method to improve the DOF and SNR in HFUI. |
| first_indexed | 2024-04-11T13:23:06Z |
| format | Article |
| id | doaj.art-06056e49858447fcb910f9faf7714975 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:23:06Z |
| publishDate | 2014-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-06056e49858447fcb910f9faf77149752022-12-22T04:22:08ZengMDPI AGSensors1424-82202014-08-01148142781428810.3390/s140814278s140814278Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound ImagingJong Seob Jeong0Department of Medical Biotechnology, Dongguk University, Seoul 100-715, KoreaIn high frequency ultrasound imaging (HFUI), the quality of focusing is deeply related to the length of the depth of field (DOF). In this paper, a phase-inversion technique implemented by a dual-element transducer is proposed to enlarge the DOF. The performance of the proposed method was numerically demonstrated by using the ultrasound simulation program called Field-II. A simulated dual-element transducer was composed of a disc- and an annular-type elements, and its aperture was concavely shaped to have a confocal point at 6 mm. The area of each element was identical in order to provide same intensity at the focal point. The outer diameters of the inner and the outer elements were 2.1 mm and 3 mm, respectively. The center frequency of each element was 40 MHz and the f-number (focal depth/aperture size) was two. When two input signals with 0° and 180° phases were applied to inner and outer elements simultaneously, a multi-focal zone was generated in the axial direction. The total −6 dB DOF, i.e., sum of two −6 dB DOFs in the near and far field lobes, was 40% longer than that of the conventional single element transducer. The signal to noise ratio (SNR) was increased by about two times, especially in the far field. The point and cyst phantom simulation were conducted and their results were identical to that of the beam pattern simulation. Thus, the proposed scheme may be a potential method to improve the DOF and SNR in HFUI.http://www.mdpi.com/1424-8220/14/8/14278high frequency ultrasound imagingdepth of fieldsignal-to-noise ratiodual-element transducerphase-inversionmulti-focal zone |
| spellingShingle | Jong Seob Jeong Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging Sensors high frequency ultrasound imaging depth of field signal-to-noise ratio dual-element transducer phase-inversion multi-focal zone |
| title | Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging |
| title_full | Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging |
| title_fullStr | Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging |
| title_full_unstemmed | Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging |
| title_short | Dual-Element Transducer with Phase-Inversion for Wide Depth of Field in High-Frequency Ultrasound Imaging |
| title_sort | dual element transducer with phase inversion for wide depth of field in high frequency ultrasound imaging |
| topic | high frequency ultrasound imaging depth of field signal-to-noise ratio dual-element transducer phase-inversion multi-focal zone |
| url | http://www.mdpi.com/1424-8220/14/8/14278 |
| work_keys_str_mv | AT jongseobjeong dualelementtransducerwithphaseinversionforwidedepthoffieldinhighfrequencyultrasoundimaging |