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Related Concept Videos

Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

Endoscopic Procedures I: Esophagogastroduodenoscopy

An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
During an EGD, the endoscope can be used to:
Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers, unexplained...
Endoscopic Procedures V: ERCP01:26

Endoscopic Procedures V: ERCP

Endoscopic Retrograde Cholangiopancreatography (ERCP) is a diagnostic procedure that combines endoscopy and fluoroscopy to diagnose and treat conditions related to the bile ducts, pancreatic ducts, and gallbladder. This procedure is beneficial for identifying and addressing blockages, gallstones, strictures, and tumors within the biliary or pancreatic systems. ERCP is both diagnostic and therapeutic, offering the ability to visualize and treat identified problems in one session.
Patient...
Urologic Endoscopic Procedure: Cystoscopic Examination01:28

Urologic Endoscopic Procedure: Cystoscopic Examination

Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

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Related Experiment Video

Updated: Jun 20, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
07:44

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction

Published on: March 25, 2022

Human endoscopic ultrasonography

E P Dimagno, P T Regan, J E Clain

    Gastroenterology
    |October 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an ultrasonic endoscope for high-resolution imaging of abdominal organs and gastrointestinal mucosa. The safe, novel endoscopic ultrasound technique improves diagnostic capabilities for various gastrointestinal and pancreatic diseases.

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    Area of Science:

    • Gastroenterology and Medical Imaging

    Background:

    • Conventional transcutaneous ultrasound is limited by poor resolution and inability to penetrate deep abdominal organs.
    • High-frequency ultrasound probes (>5 MHz) offer better resolution but lack sufficient penetration for adult intra-abdominal imaging via surface application.

    Purpose of the Study:

    • To evaluate the safety and efficacy of a novel ultrasonic endoscope for high-resolution, real-time imaging of intra-abdominal organs and gastrointestinal mucosa.
    • To assess the diagnostic potential of endoscopic ultrasound in differentiating gastrointestinal mucosal diseases from extraluminal organ pathologies.

    Main Methods:

    • An ultrasonic endoscope with a 10-MHz, 64-element linear array was integrated into a rigid endoscopic tip (35 mm long, 13 mm wide).
    • Real-time ultrasound imaging with sub-millimeter resolution was performed.
    • Thirty-two studies were conducted on 15 healthy subjects and 12 patients with conditions including pancreatic cancer, chronic pancreatitis, gastric ulcer, and pancreatic abscess.

    Main Results:

    • The ultrasonic endoscope procedure was demonstrated to be safe.
    • High-resolution, real-time ultrasound visualization of the heart, aorta, spleen, pancreas, liver, gallbladder, kidneys, and gastrointestinal mucosa was achieved.
    • The technique successfully detected moderate pancreatic tumors and hepatic metastases smaller than 1 cm in diameter.

    Conclusions:

    • Endoscopic ultrasound offers a safe and effective method for high-resolution imaging of intra-abdominal organs and gastrointestinal mucosa.
    • This integrated diagnostic approach allows for simultaneous visualization of mucosal and extraluminal structures, facilitating rapid differentiation of diseases.
    • The ultrasonic endoscope shows significant promise for improving the diagnosis of gastrointestinal and pancreatic conditions.