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Endoscopic ultrasound : ウィキペディア英語版
Endoscopic ultrasound

Endoscopic ultrasound (EUS) or echo-endoscopy is a medical procedure in which endoscopy (insertion of a probe into a hollow organ) is combined with ultrasound to obtain images of the internal organs in the chest , abdomen and colon. It can be used to visualize the walls of these organs, or to look at adjacent structures. Combined with Doppler imaging, nearby blood vessels can also be evaluated.
Endoscopic ultrasonography is most commonly used in the upper digestive tract and in the respiratory system. The procedure is performed by gastroenterologists or pulmonologists who have had extensive training. For the patient, the procedure feels almost identical to the endoscopic procedure without the ultrasound part, unless ultrasound-guided biopsy of deeper structures is performed.
==Digestive tract==
CLASSIFICATION OF ULTRASONIC ENDOSCOPES
1-Dedicated ultrasonic endoscopes --mini ultrasonic probe permanently attached to the tip of the endoscope allows detailed examination of superficial and deep layers of digestive tract
2-trans endoscopic miniature ultrasonic probes--probe is 2 mm in diameter,can be inserted through the biopsy channel of endoscope.Used for endosonography of billiary and pancreatic ducts.Its frequency ranges from 12 to 30 MHz
3-Color Doppler ultrasonic endoscopes--capability of visualizing blood vessels of intestine,
4-Puncture intended ultrasonic endoscopes--for doing FNA
5-3-D ENDOSCOPIC DOPPLER ULTRASOUND-Further improve resolution and diagnostic accuracy by 3-D imaging

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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