作者: GILD 時(shí)間: 2025-3-21 23:41
What have we learned about coronary artery disease from high-frequency epicardial echocardiography?ich appear normal or only minimally diseased by angiograms are often diffusely and severely atherosclerotic. We have also evaluated the shape of atherosclerotic lesions and demonstrated a wide range of lumen shapes (oval, circular, complex) and location within the residual coronary lumen (eccentric 作者: admission 時(shí)間: 2025-3-22 02:00
Clinical percutaneous imaging of coronary anatomy using an over-the-wire ultrasound catheter systemal and coronary vessels without evidence of significant vessel trauma. Subsequently, 20 patients had percutaneous coronary imaging performed during cardiac catheterization. Cardiac motion was rarely a problem and acceptable images were obtained in all but two patients. Areas of calcification, mild s作者: 惰性氣體 時(shí)間: 2025-3-22 05:20
Paul G. Yock,David T. Linker,Neal W. White,Michael H. Rowe,Matthew R. Selmon,Gregory C. Robertson,Tont limiter.Understand the requirements for circuits and how they are put together.Read and differentiate what various parts of the schematics do.Decide what considerations to take when choosing components.Use a978-1-4842-5978-8978-1-4842-5979-5作者: CT-angiography 時(shí)間: 2025-3-22 10:29 作者: BABY 時(shí)間: 2025-3-22 14:20 作者: 標(biāo)準(zhǔn) 時(shí)間: 2025-3-22 18:07
David T. Linker,Paul G. Yock,?ge Gr?nnings?ther,Erling Johansen,Bj?rn A. J. Angelsen作者: 夸張 時(shí)間: 2025-3-22 23:18
J. McB. Hodgson,S. P. Graham,A. D. Savakus,S. G. Dame,D. N. Stephens,P. S. Dhillon,D. Brands,H. Shee作者: remission 時(shí)間: 2025-3-23 04:23
H. ten Hoff,A. Korbijn,Th. H. Smit,J. F. F. Klinkhamer,N. Bom作者: 等級(jí)的上升 時(shí)間: 2025-3-23 06:52
N. Bom,H. ten Hoff,C. T. Lancée,W. J. Gussenhoven,J. G. Bosching need to increase exports. This has accentuated the need for access to a marketing network in foreign markets. Sections 4.1–4.4 therefore discuss the barriers to entry in the R&D process, in the procurement of components, in production, and in marketing. In section 4.5 the shape of the cost curve作者: faction 時(shí)間: 2025-3-23 12:05
J. Roelandt,P. W. Serruysing need to increase exports. This has accentuated the need for access to a marketing network in foreign markets. Sections 4.1–4.4 therefore discuss the barriers to entry in the R&D process, in the procurement of components, in production, and in marketing. In section 4.5 the shape of the cost curve作者: A簡(jiǎn)潔的 時(shí)間: 2025-3-23 15:33 作者: 終止 時(shí)間: 2025-3-23 19:17
W. J. Gussenhoven,C. E. Essed,P. Frietman,F. Mastik,C. Lancée,C. Slager,P. Serruys,P. Gerritsen,H. Pview the basic “patterns” of resistor usage—pull up, pull down, voltage divider, and current limiter.Understand the requirements for circuits and how they are put together.Read and differentiate what various parts of the schematics do.Decide what considerations to take when choosing components.Use a作者: 洞察力 時(shí)間: 2025-3-24 00:28 作者: Coterminous 時(shí)間: 2025-3-24 04:13
R. J. Crowley,P. L. von Behren,L. A. Couvillon Jr.,D. E. Mai,J. E. Abeleous hardware design examples by integrating the topics learned in earlier chapters.? The last chapter extensively reviews the combinational and sequential logic design principles to be able to design the digital part of embedded system hardware.978-3-319-81886-3978-3-319-39439-8作者: Palpable 時(shí)間: 2025-3-24 09:14
H. T. Aretz,M. A. Martinelli,E. G. LeDetous hardware design examples by integrating the topics learned in earlier chapters.? The last chapter extensively reviews the combinational and sequential logic design principles to be able to design the digital part of embedded system hardware.978-3-319-81886-3978-3-319-39439-8作者: 王得到 時(shí)間: 2025-3-24 13:50 作者: 拱墻 時(shí)間: 2025-3-24 18:30
Intraluminal real-time ultrasonic imaging: Clinical perspectives,cular arteries is rarely appreciated. Precordial cross-sectional echocardiography allows the visualization of proximal parts of the coronary arteries but the success rate is low and the image quality insufficient for clinical decision making in coronary artery disease [5].作者: 增強(qiáng) 時(shí)間: 2025-3-24 22:37 作者: ASSET 時(shí)間: 2025-3-24 23:53
Laser ablation and the need for intra-arterial imaging,gn of an ultrasound catheter which combines high-resolution diagnostic imaging with steerability, flexibility and controlled ablation is now the major engineering challenge in interventional cardiology.作者: Genistein 時(shí)間: 2025-3-25 05:28 作者: Carbon-Monoxide 時(shí)間: 2025-3-25 09:04 作者: 骯臟 時(shí)間: 2025-3-25 13:34 作者: 兒童 時(shí)間: 2025-3-25 16:43 作者: 大方一點(diǎn) 時(shí)間: 2025-3-25 23:45 作者: Eosinophils 時(shí)間: 2025-3-26 00:10
Imaging artifacts in mechanically driven ultrasound catheters,ared for rotational speed of 1000 and 3000 revolutions per minute (rpm), and for straight as well as strongly curved catheters. By way of example, the periodic angle error varies from 25 degrees top-top in a straight catheter to 80 degrees top-top when the catheter is curved with R = 20 mm, using a spiral drive-shaft at 1000 rpm.作者: Embolic-Stroke 時(shí)間: 2025-3-26 04:46 作者: Ingratiate 時(shí)間: 2025-3-26 12:30 作者: 引導(dǎo) 時(shí)間: 2025-3-26 15:06
J. Roelandt,P. W. Serruysthat change a change in the height and nature of the barriers to entry. I mentioned above that the scale of output has increased substantially among the leading firms. Combined with the possibility of reaping benefits from economies of scale, price competition has taken on a much more important role作者: Integrate 時(shí)間: 2025-3-26 18:46 作者: fiscal 時(shí)間: 2025-3-26 23:03 作者: angiography 時(shí)間: 2025-3-27 02:05
Paul G. Yock,David T. Linker,Neal W. White,Michael H. Rowe,Matthew R. Selmon,Gregory C. Robertson,ToChallenge yourself with additional practice questions and prJump start your journey with electronics! If you’ve thought about getting into electronics, but don’t know where to start, this book gives you the information you need. Starting with the basics of electricity and circuits, you‘ll be introdu作者: 天氣 時(shí)間: 2025-3-27 08:23 作者: 強(qiáng)壯 時(shí)間: 2025-3-27 10:43
Richard I. Kitney,Lincoln Moura,Keith Straughanormation you need. Starting with the basics of electricity and circuits, you‘ll be introduced to digital electronics and microcontrollers, capacitors and inductors, and amplification circuits – all while gaining the basic tools and information you need to start working with low-power electronics..El作者: Cubicle 時(shí)間: 2025-3-27 14:50 作者: 預(yù)感 時(shí)間: 2025-3-27 21:25
H. T. Aretz,M. A. Martinelli,E. G. LeDetfundamentals of signal integrity, diode and bipolar transistThis book provides semester-length coverage of electronics for embedded systems, covering most common analog and digital circuit-related issues encountered while designing embedded system hardware.? It is written for students and young prof作者: ULCER 時(shí)間: 2025-3-27 23:39
Early and recent intraluminal ultrasound devices,ns of catheter tip or gastroscopic tube tip mounted transducers have been described. This chapter surveys these methods, subdividing them into a) measurements; b) Doppler and c) imaging. The survey ranges from early work of Cieszynski on the feasibility of echocardiography to more recent intra-arter作者: 可用 時(shí)間: 2025-3-28 04:51
Intraluminal real-time ultrasonic imaging: Clinical perspectives,ronary vascular disease. The method, however, underestimates the extent and severity of arterial atherosclerotic disease and the large intra- and interobserver variability limits the quantitative assessment of therapeutic interventions [1, 2]. Noninvasive ultrasound imaging provides cross-sectional 作者: BAIT 時(shí)間: 2025-3-28 08:19
Ultrasound imaging and atherogenesis,signs and symptoms have developed the lesion usually is in an advanced stage. Second, the detection of early atherosclerotic lesions creates the problem of distinguishing between almost natural, age-related intimal changes and intimal thickening as a precursor lesion of atherosclerosis. The hallmark作者: ablate 時(shí)間: 2025-3-28 12:07
Intravascular echographic assessment of vessel wall characteristics: a correlation with histology,r surgeons, radiologists and cardiologists. This report demonstrates in vitro results obtained with a high frequency imaging catheter (40 MHz) in 70 human specimens including arteries with and without atherosclerosis, veins, coronary artery bypass grafts and vascular prosthetic material. Correlation作者: candle 時(shí)間: 2025-3-28 18:25 作者: rheumatology 時(shí)間: 2025-3-28 20:17 作者: extemporaneous 時(shí)間: 2025-3-28 22:56 作者: Gourmet 時(shí)間: 2025-3-29 06:43
Intraluminal ultrasound guidance of transverse laser coronary atherectomy, requirements for these systems are proposed, and compared to the design features of a laser atherectomy system currently under development by Intra-Sonix. This system uses high resolution ultrasound for real-time guidance and control and is potentially capable of characterizing lesions and imaging 作者: syncope 時(shí)間: 2025-3-29 08:08
Review of intracoronary Doppler catheters, Validation studies in the laboratory and in animals have shown that these catheters can accurately measure velocity from a small sample volume beside or ahead of the catheter tip. The Doppler transducers have been miniaturized enough (< 1 mm dia) to be mounted on subselective coronary catheters or 作者: cortex 時(shí)間: 2025-3-29 14:08 作者: exceed 時(shí)間: 2025-3-29 15:58
Analysis of backscattered ultrasound from normal and diseased arterial wall,cic ultrasound. The short distance from transducer to tissue, fluid path, high frequencies, and special characteristics of the tissues of interest all contribute to making practical tissue characterization by measurement of the backscattered signal more probable in intra-arterial imaging. The proper作者: 比賽用背帶 時(shí)間: 2025-3-29 20:29
Clinical percutaneous imaging of coronary anatomy using an over-the-wire ultrasound catheter systemign and incorporates a phased array transducer at its tip. There are no moving parts. A 360° image is produced perpendicular to the catheter axis using a 20 MHz center frequency. A dedicated minicomputer is used for initial image processing, as well as enhancement and analysis. Initial studies using作者: 使害羞 時(shí)間: 2025-3-30 02:08
Imaging artifacts in mechanically driven ultrasound catheters,ia this shaft to the rotating echo tip element. In practice, the tip does not identically ‘follow’ the rotation of the motor due to low torsional rigidity of the shaft, which creates artifacts in the displayed cross-sectional image. In order to visualize curved arteries such as the coronary arteries作者: 作嘔 時(shí)間: 2025-3-30 06:28
Design characteristics for intravascular ultrasonic catheters,ions are developed for calculating the forces affecting catheter passage in a blood vessel. These equations are applied to the problem of Judkins (transfemoral) coronary artery catheterization, using previously described anatomical information and catheter moduli values. The introduction force is ca作者: Spirometry 時(shí)間: 2025-3-30 09:59
Clinical applications of intravascular ultrasound imaging in atherectomy,This paper discusses the potential application of intravascular ultrasound imaging in the context of catheter-based atherectomy. The advantages and limitations of ultrasound in this application are discussed, and representative cases are presented.作者: 職業(yè) 時(shí)間: 2025-3-30 13:03 作者: 編輯才信任 時(shí)間: 2025-3-30 19:07
978-94-010-6943-4Kluwer Academic Publishers 1989作者: cortisol 時(shí)間: 2025-3-31 00:20 作者: Bravado 時(shí)間: 2025-3-31 03:52
https://doi.org/10.1007/978-94-009-1007-2ultrasound; Ultrasonography作者: epidermis 時(shí)間: 2025-3-31 08:01
