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检索条件"主题词=2-D array"
40 条 记 录,以下是31-40 订阅
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dual-layer transducer array for 3-d imaging
Dual-layer transducer array for 3-d imaging
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IEEE Ultrasonics Symposium
作者: Jeong, Jong Seob Seo, Chi Hyung Yen, Jesse T. Univ So Calif Dept Biomed Engn Los Angeles CA 90089 USA
The difficulty in fabricating and connecting large numbers of 2-d array elements has limited the development of 2-d transducer array with more than 5000 elements. In this paper, we propose a dual-layer transducer arra... 详细信息
来源: 评论
Small-pitch flip-chip-bonded VCSEL arrays enabling transmitter redundancy and monitoring in, 2-d 10-Gbit/s space-parallel fiber transmission
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IEEE JOURNAL OF SELECTEd TOPICS IN QUANTUM ELECTRONICS 2007年 第5期13卷 1279-1289页
作者: Roscher, Hendrik Rinaldi, Fernando Michalzik, Rainer Univ Ulm Inst Optoelect D-89069 Ulm Germany
We demonstrate novel pixel architectures in 2-d vertical-cavity surface-emitting laser (VCSEL) arrays offering additional functionality without sacrificing efficient fabrication, compactness, and low module cost. Very... 详细信息
来源: 评论
Improved spatial resolution in a three-dimensional acoustic medical imaging system based on a hybrid method using a synthetic aperture technique
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JAPANESE JOURNAL OF APPLIEd PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 2007年 第7B期46卷 4827-4833页
作者: Taki, Hirofumi Sato, Toru Kyoto Univ Grad Sch Informat Kyoto 6068501 Japan
For an acoustic real-time three-dimensional (3-d) imaging system with high spatial resolution, we propose a system based on a hybrid method using a synthetic aperture technique. We can change the transmit point in thi... 详细信息
来源: 评论
Real-time transrectal 3-d ultrasound using synthetic aperture
Real-time transrectal 3-D ultrasound using synthetic apertur...
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Medical Imaging 2006 Conference
作者: Yen, Jesse T. Seo, Chi Hyung daher, Nadim M. Univ Southern Calif Dept Biomed Engn Los Angeles CA 90089 USA
In previous work, we investigated 3-d synthetic aperture imaging with 2-d array designs for real-time rectilinear volumetric imaging of targets near the transducer such as the breast and carotid artery. Here we presen... 详细信息
来源: 评论
Real-time 3d transesophageal echocardiography
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ULTRASONIC IMAGING 2004年 第4期26卷 217-232页
作者: Pua, EC Idriss, SF Wolf, Pd Smith, SW Duke Univ Dept Biomed Engn Durham NC 27708 USA Duke Univ Med Ctr Dept Pediat Durham NC 27708 USA
Transesophageal echocardiography (TEE) is an essential diagnostic tool in patients with poor transthoracic echocardiographic windows or when detailed imaging of structures distant from the chest wall is necessary. A r... 详细信息
来源: 评论
dual lumen transducer probes for real-time 3-d interventional cardiac ultrasound
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ULTRASOUNd IN MEdICINE ANd BIOLOGY 2003年 第9期29卷 1297-1304页
作者: Lee, W Idriss, SF Wolf, Pd Smith, SW Duke Univ Dept Biomed Engn Durham NC 27708 USA Duke Univ Med Ctr Dept Pediat Durham NC 27710 USA
We have developed dual lumen probes incorporating a forward-viewing matrix array transducer with an integrated working lumen for delivery of tools in real-time 3-d (RT3-d) interventional echocardiography. The probes a... 详细信息
来源: 评论
Real-time cylindrical curvilinear 3-d ultrasound imaging
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ULTRASONIC IMAGING 2003年 第3期25卷 137-150页
作者: Pua, EC Yen, JT Smith, SW Duke Univ Dept Biomed Engn Durham NC 27705 USA
In patients who are obese or exhibit signs of pulmonary disease, standard transthoracic scanning may yield poor quality cardiac images. For these conditions, two-dimensional transesophageal echocardiography (TEE) is e... 详细信息
来源: 评论
Real-time rectilinear volumetric imaging using a periodic array
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ULTRASOUNd IN MEdICINE ANd BIOLOGY 2002年 第7期28卷 923-931页
作者: Yen, JT Smith, SW Duke Univ Dept Biomed Engn Durham NC 27708 USA
Current real-time phased array volumetric scanners use a 2-d array to scan a pyramidal volume comprised of many sector scans stacked in the elevation direction. This scan format is primarily useful for cardiac imaging... 详细信息
来源: 评论
Improved signal-to-noise ratio in hybrid 2-d arrays: Experimental confirmation
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ULTRASONIC IMAGING 1997年 第2期19卷 93-111页
作者: Emery, Cd Smith, SW DUKE UNIV DEPT RADIOLDURHAMNC 27708
2-d array transducers have shown significant promise for medical ultrasound over conventional linear arrays, at the cost of increasing the number of channels, difficulty of fabrication and array element impedance. The... 详细信息
来源: 评论
Calculation of ultrasonic transducer signal-to-noise ratios using the KLM model
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IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS ANd FREQUENCY CONTROL 1997年 第5期44卷 1018-1026页
作者: Oakley, CG Tetrad Corporation Englewood CO USA
This paper describes a method for adding thermal and amplifier noise to a KLM model for a transducer element. The model is used to compare the magnitudes of various noise sources in a 5 MHz array element typical of th... 详细信息
来源: 评论