صفحة 3 من 4

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الاثنين فبراير 25, 2019 6:59 pm
بواسطة دكتور كمال سيد
Basic principles of ultrasound


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Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الاثنين فبراير 25, 2019 7:00 pm
بواسطة دكتور كمال سيد
How Ultrasound Imaging Works

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 5:30 pm
بواسطة دكتور كمال سيد
شرح الموجات فوق الصوتية باللغة العربية ULTRASOUND A-Z

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 5:32 pm
بواسطة دكتور كمال سيد
الموجات الصوتيه و أهميتها فى الكشف على أى مريض

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 5:34 pm
بواسطة دكتور كمال سيد
Ultrasound of the Liver 1 in Arabic

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 5:36 pm
بواسطة دكتور كمال سيد
Ultrasound of the Liver 2 in Arabic

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 6:03 pm
بواسطة دكتور كمال سيد
Ultrasound of the Liver 3 in Arabic

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 6:04 pm
بواسطة دكتور كمال سيد
Ultrasound of the Liver 4 in Arabic

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 9:31 pm
بواسطة دكتور كمال سيد
-What is sonography?

Ultrasonography, commonly called sonography, is a diagnostic medical procedure that uses high frequency sound waves (ultrasound) to produce dynamic visual images of organs, tissues, or blood flow inside the body. This type of procedure is often referred to as a sonogram or ultrasound scan.

Sonography can be used to examine many parts of the body, such as the abdomen, breasts, female reproductive system, prostate, heart, and blood vessels. Sonography is increasingly being used in the detection and treatment of heart disease, heart attack, and vascular disease that can lead to stroke.
It is also used to guide fine needle, tissue biopsy to assist in taking a sample of cells from an organ for lab testing (for example, a test for cancer in breast tissue). Unlike X-rays, sonography is a radiation-free imaging modality.
The non-physician professionals who perform these procedures are known as sonographers and vascular technologists (who are sonographers specializing in imaging and tests of blood vessels).

There are several areas of specialization in the field of sonography.
These specialty areas are:
Abdomen - evaluation of all the soft tissues, blood vessels and organs of the abdominal cavities (for example, liver, spleen, urinary
(tract, pancreas
Breast - frequently used to evaluate breast abnormalities that are found with screening or diagnostic mammography
Obstetrics/Gynecology - evaluation of the female reproductive system

Echocardiography - evaluation of the anatomy and hemodynamics (blood flow) of the heart, its valves and related blood vessels
Vascular Technology - evaluation and analysis of the hemodynamics (blood flow) of peripheral and abdominal blood vessels

Neurosonology - evaluation of the brain and spinal cord
Ophthalmology - evaluation of the eye, including orbital structures and muscles

What does a diagnostic medical sonographer do?

A diagnostic medical sonographer is a highly-skilled professional who uses specialized equipment to create images of structures inside the human body that are used by physicians to make a medical diagnosis.

The process involves placing a small device called a transducer against the patient's skin near the body area to be imaged.
The transducer works like a loudspeaker and microphone because it can transmit sound and receive sound.
The transducer sends a stream of high frequency sound waves into the body that bounce off the structures inside.
The transducer detects sound waves as they bounce off the internal structures.
Different structures in the body reflect these sound waves differently.
These sounds are analyzed by a computer to make an image of the structure(s) on a television screen or that can be recorded on videotape.
Sonographers have extensive, direct patient contact that may include performing some invasive procedures.
They must be able to interact compassionately and effectively with people who range from healthy to critically ill.



How does Ultrasound work?

(mechanism of image production)

Ultrasound imaging uses sound waves that pass through the body and produce echoes which can identify distance, size and shape of organs inside the body.


A special hand held transducer or probe, with the addition of gel is passed over the body targeting and imaging certain organs to produce diagnostic images. The transducer does this by emitting sound and detecting returning echoes from the body part being studied.

The echoes are analyzed by a computer housed within the ultrasound machine and then transformed into moving pictures of the organ or tissues being examined.

Ultrasound waves can pass easily through fluids and soft tissues making the procedure especially useful for examining a foetus in amniotic fluid or fluid filled structures such as gallbladders and urinary bladders or vessels of the circulatory system. It is the first line of imaging for solid organs such as the liver and kidneys. Bone and air can limit or obstruct the view but even so ultrasound has been used to image most areas of the body.


How Ultrasound Imaging Works


Lecture 2: Basic Physical Principals of Ultrasound


Lecture 1: A Brief History of Ultrasound

Re: اساسيات الموجات فوق الصوتية

مشاركةمرسل: الثلاثاء إبريل 23, 2019 9:35 pm
بواسطة دكتور كمال سيد
Lecture 6a: Real Time


Lecture 6b: Gray Scale


Lecture 7: How to Approach a Diagnosis?