초음파 모드의 종류

문서 내 토픽

1. Amplitude mode(A-mode)

에코의 강도를 진폭의 파형 높이로 표시하는 방법으로, 반사파 강도를 진폭으로 나타냅니다. 다른 모드와 병행하여 진단의 정확성을 높이기 위해 사용되며, 펄스파를 이용합니다. 현재는 잘 사용되지 않습니다.
2. Motion mode(M-mode)

움직이는 반사체를 시간적 변화로 표시하는 방법으로, 반사파 강도를 운동파형으로 나타냅니다. 펄스파를 이용하며, 주로 심장의 운동을 영상화하는 데 사용됩니다.
3. Brightness mode(B-mode)

반사파의 강도를 휘도의 형태로 기록하여 초음파의 단면상으로 나타내는 방법입니다. 반사파의 강도를 농도의 점으로 기록하며, 펄스파를 이용합니다. 복부, 갑상선 등에 사용됩니다.
4. Color Doppler image method(CDI)

2차원 단면 내 혈류의 방향과 속도의 크기를 색의 종류, 밝기, 색조의 차이로 나타내는 방법입니다. B-mode의 초음파 회색도 단층상에 혈류 정보를 추가하여 색으로 표시합니다. 미세한 혈관과 혈류 검출이 어려운 단점이 있습니다.
5. Doppler mode(D-mode)

도플러 효과를 이용하여 혈류의 속도 및 방향을 측정할 수 있는 검사 방법입니다. 펄스파나 연속파를 이용하며, 펄스파는 심장 내의 일정 부위와 대혈관에서 혈류의 양상을 도플러음으로 표현하고, 연속파는 빠른 속도의 혈류를 진단하는 데 사용됩니다.

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1. Amplitude mode(A-mode)

Amplitude mode (A-mode) is a basic ultrasound imaging technique that displays the amplitude of the reflected ultrasound waves as a function of time. This mode is primarily used for measuring the depth and location of structures within the body. A-mode is particularly useful for visualizing the boundaries between different tissues, such as the skin, fat, muscle, and bone. It provides a one-dimensional representation of the internal structures, allowing for accurate measurements of the distance between specific points. A-mode is often used in ophthalmology to measure the axial length of the eye, which is crucial for intraocular lens calculations in cataract surgery. Additionally, A-mode can be employed in the assessment of the thickness of the cornea and the depth of the anterior chamber. While A-mode is a relatively simple and straightforward imaging technique, it lacks the detailed spatial information provided by other ultrasound modes, such as B-mode and Doppler imaging. However, its simplicity and ability to provide precise measurements make it a valuable tool in various medical applications, particularly in situations where a focused, targeted evaluation is required.
2. Motion mode(M-mode)

Motion mode (M-mode) is an ultrasound imaging technique that displays the motion of structures within the body over time. In M-mode, the ultrasound beam is directed at a specific location, and the reflected signals are displayed as a function of time on a graph. This allows for the visualization of the movement and dynamics of structures, such as the heart, blood vessels, and other organs. M-mode is particularly useful for evaluating the function and structure of the heart, as it can provide detailed information about the movement of the heart walls, valves, and blood flow. It is commonly used to measure the size and contractility of the heart chambers, as well as to detect abnormalities in the timing and coordination of the heart's movements. M-mode can also be used to assess the motion of other structures, such as the diaphragm and the carotid artery, providing valuable information for the diagnosis and monitoring of various medical conditions. While M-mode offers a more limited spatial representation compared to B-mode imaging, its ability to capture the dynamic behavior of structures over time makes it a valuable tool in various clinical settings, particularly in cardiology and vascular imaging.
3. Brightness mode(B-mode)

Brightness mode (B-mode) is the most commonly used ultrasound imaging technique, providing a two-dimensional, real-time visualization of the internal structures of the body. In B-mode, the amplitude of the reflected ultrasound waves is represented by the brightness of the pixels on the display, creating a detailed image of the anatomy. This mode allows for the visualization of a wide range of tissues, including organs, muscles, blood vessels, and other structures. B-mode imaging is particularly useful for evaluating the size, shape, and location of various organs, as well as for detecting abnormalities such as tumors, cysts, and other pathologies. It is widely used in a variety of medical specialties, including obstetrics, abdominal imaging, musculoskeletal imaging, and vascular imaging. The high-resolution and real-time nature of B-mode ultrasound make it a valuable diagnostic tool, allowing for the rapid assessment of the internal structures and the detection of changes over time. Additionally, B-mode imaging can be combined with other ultrasound techniques, such as Doppler imaging, to provide even more comprehensive information about the structure and function of the body's systems.
4. Color Doppler image method(CDI)

Color Doppler image (CDI) is an advanced ultrasound imaging technique that uses the Doppler effect to visualize and quantify the movement of blood and other fluids within the body. In CDI, the ultrasound system detects the shift in frequency of the reflected ultrasound waves caused by the movement of the target, and this information is used to create a color-coded image that represents the direction and velocity of the flow. The resulting image displays the blood flow in different colors, typically with red and blue representing flow towards and away from the transducer, respectively, and the intensity of the color indicating the velocity of the flow. CDI is particularly useful for evaluating the function and patency of blood vessels, as well as for detecting and monitoring various vascular disorders, such as stenosis, thrombosis, and arteriovenous malformations. It is also used in the assessment of cardiac function, including the evaluation of valvular function and the detection of abnormal blood flow patterns. The ability of CDI to provide real-time, non-invasive visualization of blood flow makes it a valuable diagnostic tool in a wide range of medical specialties, including cardiology, vascular surgery, and radiology.
5. Doppler mode(D-mode)

Doppler mode (D-mode) is an ultrasound imaging technique that uses the Doppler effect to measure the velocity and direction of moving structures, such as blood flow or tissue motion. In D-mode, the ultrasound system transmits a continuous wave of sound and measures the shift in frequency of the reflected waves, which is proportional to the velocity of the target. This information is then used to generate a graphical representation of the flow or motion, known as a Doppler waveform. D-mode is particularly useful for evaluating the function of the cardiovascular system, as it can provide detailed information about the direction and velocity of blood flow in the heart and blood vessels. It is commonly used to assess the patency and function of valves, detect stenosis or blockages, and evaluate the hemodynamics of various vascular disorders. D-mode can also be used to assess the motion of other structures, such as the diaphragm or the carotid artery, providing valuable information for the diagnosis and monitoring of various medical conditions. The ability of D-mode to quantify the velocity and direction of movement makes it a valuable tool in a wide range of clinical applications, from cardiology and vascular surgery to musculoskeletal and neurological imaging.

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