| 摘要 |
<p>An endoscopic apparatus provides for simultaneous visual and ultrasonic imaging of internal body parts through the use of a probe (10) insertable into a body cavity. The probe (10) includes a rectilinear ultrasonic transducer array (70) acoustically coupled to the body through a cylindrical focusing lens (82) having an outer face which conforms to the probe contour. The transducer array (70) is included in a pulsed ultrasonic imaging system of the B-scan type. A tube (14) connects the probe to a control housing (12). The pulsed ultrasonic imaging system includes pulse generator and pulse receiver means connected to individual elements of the transducer array (70) by coaxial cables extending through the tube (14). Electronic beam focusing and scanning means for rectilinear B-scan operation are provided for imaging of objects at close distances adjacent the probe (10). Visual display means (124) is provided for display of the ultrasonic image from the B-scan receiver. An optical illuminating and viewing system is provided for optically viewing internal body parts through the probe (10), which system includes an objective lens (28) and illuminating means adjacent the distal ends of the probe (10) and transducer array (70). A removable eyepiece at the housing (12) is used for direct viewing by the operator while guiding the probe (10) into a desired position in the body cavity. The optical image can also be viewed by a video camera having an output connected to a monitor (40) adjacent the ultrasonic image display means (124). Consequently, both the optical and ultrasonic images are simultaneously displayable and viewable by the operator. <IMAGE></p> |
