Ultrasound PPT and PDF For Free Download
Ultrasound PPT and PDF For Free Download: Ultrasound is a term that is used to explain the sound of frequencies above 20,000 Hertz (Hz). 20,000 is a range that is beyond the human hearing range. Frequencies which are between 1 – 30 MHz are typical for diagnostic ultrasound. Distinct ranges of frequency are availed for examination of distinct parts of the body and they are mentioned below:
- 3 – 5 MHz for the abdominal areas
- 5 – 10 MHz for small parts and superficial parts
- 10 – 30 MHz for eyes and skin
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Ultrasound PPT and PDF For Free Download
Generation of ultrasound:
Piezoelectric crystals or piezoelectric materials are capable to convert mechanical pressure into an electrical voltage on their surface. When voltage is applied to opposite sides of a piezoelectric crystal then it causes a modification in its thickness. If applied electric voltage is changing, it produces oscillations that are transmitted as ultrasound waves into a medium that is surrounding. So, from this, we can say that piezoelectric crystals play the role of transducers that convert electrical energy into mechanical energy and mechanical energy into electrical energy.
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Now, coming to ultrasound transducers, they are made up of thin discs. These discs are made up of artificial ceramic material like lead zirconate titanate. Usually, they have the thickness of 0.1 – 1mm which determines ultrasound frequency.
Properties of ultrasound:
- Ultrasound propagates as longitudinal waves in fluids and in gas. In this medium, particles vibrate in a to and fro motion in a direction of propagation.
- The velocity of sound depends on the compressibility of medium and density of medium.
- Resolution of images gets affected by wavelength of ultrasound.
- Images of ultrasound have the feature of acoustic shadow.
- A medium has acoustic properties and acoustic impedance is a term in which they are quantified. There will be a tiny difference between acoustic impedance of organs and distinct biological tissues.
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A shape of ultrasound beam: Ultrasound field which is a three-dimensional can be explained as a beam shape from a focused transducer.
Spatial resolution: Spatial resolution is explained as least distance between two objects which are still distinguishable. Lateral resolution and axial resolution have to be differentiated in images of ultrasound.
- Lateral resolution: It depends on diameter of ultrasound beam.
- Axial resolution: It depends on length of pulse and enhances as the length of pulse decreases.
Techniques of ultrasound:
There are various techniques which are used in ultrasound and are mentioned below:
- M-mode or TM-mode
- B-scan, two dimensional
- Three-dimensional and four-dimensional techniques
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Doppler techniques are very important in examining the flow of blood. The Doppler techniques are mentioned below:
- Continuous wave Doppler
- Pulsed wave Doppler
- Spectral Doppler
Applications of ultrasound:
Few applications of ultrasound are mentioned below and it is used for examining the following things:
- Extremities like connective tissues, muscles, joints, and vessels
- Neck: vessels, abscesses, thyroid gland, and lymph nodes
- Chest: heart (echocardiography), wall, pleura, mediastinal tumors, and disorders of lungs which are situated in peripheral area of lungs
- Abdomen, small pelvis, and retroperitoneum: fluid-containing structures, parenchymatous organs, gastrointestinal tract, great vessels, lymph nodes, abnormal fluid collections, and tumors
- Spine in infants
- Hips in infants
- Brain in infants
- Unborn child fetus in pregnant women
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General indications done by these are mentioned below:
- Presence of organs
- Position of organs
- Shape and size of organs
- Diagnosis of tumor
- Differentiation of focal lesions
- Dysfunction, stasis, and concretions of structures and hollow organs
- Inflammatory diseases
- Metabolic diseases which cause macroscopic alterations of organs
- Evaluating transplants
- Abnormal fluid collection in organs of body
- Diagnosis of malformations
- Diagnosis of congenital defects
An ultrasound examination does not need any preparation but for few examinations of abdomen, certain preparations are needed. Those preparations include fasting for certain period as it is useful and required.
Equipment and explanation of Ultrasound Procedure:
- Present ultrasound equipment has all-round scanners and also have two transducers.
- In few ultrasound procedures, a transducer is attached to probe and that probe is inserted into body through natural opening. Such procedures are mentioned below:
- Transesophageal echocardiogram
- Transrectal ultrasound
- Transvaginal ultrasound
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Interpretation of an Ultrasound Image:
Organs, structure within organs, tumors, fluid collections, and vessels are evaluated by B-scan technique in terms of the following:
- Outer border
- Echo pattern
Benefits of Ultrasound:
- Mostly, ultrasound scanning doesn’t need any needles or injections
- These examinations are not painful
- It is affordable and easy to use
- It gives clear images of soft tissues
- It furnishes real-time imaging
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Risks of Ultrasound:
- There are few known harmful effects of ultrasound examination
Content of the Seminar and PDF for Ultrasound
- What is Ultrasound imaging?
- Why Ultrasound?
- Common Uses
- Properties of Ultrasound
- How does the procedure work?
- Benefits and Risks
Here we are giving you Ultrasound Seminar and PPT with PDF. All you need to do is just click on the download link and get it.
It was all about Ultrasound Seminar and PPT with PDF. If you liked it then please share it or if you want to ask anything then please hit the comment button.https://studymafia.org/ultrasound-ppt-and-pdf-for-free-download/UncategorizedUltrasound PPT and PDF For Free Download: Ultrasound is a term that is used to explain the sound of frequencies above 20,000 Hertz (Hz). 20,000 is a range that is beyond the human hearing range. Frequencies which are between 1 – 30 MHz are typical for diagnostic ultrasound. Distinct...Sumit ThakurSumit Thakursumitsssrt@gmail.comAdministratorI am an Indian Blogger. I am passionate about blogging. If you want to ask me anything about blogging then feel free to ask 🙂Study Mafia: Latest Seminars Topics PPT with PDF Report 2021