戏法
发表于 2025-3-26 23:13:53
978-1-4612-6297-8Springer-Verlag New York Inc. 1978
HILAR
发表于 2025-3-27 04:55:41
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fledged
发表于 2025-3-27 06:12:33
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传授知识
发表于 2025-3-27 10:10:40
Principles of ultrasonography,o propagate. The highest frequency audible to the human ear is 20,000 cycles per second or 20 kilohertz (KHz). Sound waves above this frequency are described as ultrasound. Unlike electromagnetic waves, sound cannot travel across a vacuum.
Lipoma
发表于 2025-3-27 17:11:03
Ophthalmic anatomy,ease states. Certain structures must be considered in great depth as they are significant in the comprehension of the sonographic anatomy and sonopathology. This chapter will fully outline the anatomic structures and relationships basic to ophthalmological disorders and emphasize areas that are of key importance to the sonographer and eye surgeon.
intercede
发表于 2025-3-27 20:02:37
Ultrasonic patient history,of information, such as previous surgery, can cause tbe sonographer endless frustration with the confusing scan picture. Symptoms referring to the anterior chamber of the eye will modify the scan with the addition of either a water bath system or a gel stand-off set up to produce better imaging of the anterior structures.
CLEFT
发表于 2025-3-28 00:53:22
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勤劳
发表于 2025-3-28 05:18:56
Artifacts,nographer or lead to serious misinterpretation of the study. Artifacts must be recognized, their source or sources identified and properly corrected in order to avoid gross errors in the scan interpretation. In this section, we shall only consider the artifacts pertinent to realtime contact B-scanning of the eye which will be discussed below.
quiet-sleep
发表于 2025-3-28 08:54:47
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sacrum
发表于 2025-3-28 11:25:39
Sonography of the lens, may be answered after careful ultrasonography of the vitreoretinal structures. Indeed, a dislocated lens may be discovered floating in the vitreous and cataractous changes in the normally situated lens may be studied.