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Endoluminal US: experiments with nonvascular uses in animals.
B B Goldberg1, J B Liu, D A Merton
1Department of Radiology, Jefferson Medical College, Thomas Jefferson University Hospital, Philadelphia, PA 19107.
Radiology
|April 1, 1990
Summary
Miniature ultrasound transducers in catheters can image nonvascular lumens like the urinary tract and reproductive organs. This technology shows promise for intraluminal analysis in human medical applications.
Area of Science:
- Medical Imaging
- Gastroenterology
- Urology
Background:
- Miniature ultrasound transducers are typically used for intravascular plaque evaluation.
- Nonvascular lumens present imaging challenges due to their unique anatomical structures.
Purpose of the Study:
- To evaluate the feasibility of using catheter-based miniature ultrasound (US) transducers for imaging various nonvascular lumens.
- To assess the accuracy of US imaging in determining wall thickness and echotexture of these lumens.
Main Methods:
- In vivo and in vitro animal experiments were conducted.
- Catheter-based miniature US transducers were employed to image the urethra, urinary bladder, ureter, renal pelvis, bile ducts, small bowel, fallopian tubes, and uterus.
- US images were correlated with actual anatomic specimens and confirmed with direct visualization and radiographic localization.
Main Results:
- High correlation was observed between US images and anatomic specimens.
- Structures outside the lumen were accurately identified.
- Artificially inserted renal pelvis stones and a fallopian tube polyp were clearly visualized.
Conclusions:
- Catheter-based miniature ultrasound transducers show potential for intraluminal analysis in nonvascular applications.
- This technology may offer a novel approach for diagnosing conditions within various internal lumens.