Devices, systems, and methods for controlling field of view in imaging systems

摘要

Devices, systems, and methods for controlling the field of view in imaging systems are provided. For example, in one embodiment an imaging system includes a flexible elongate member sized and shaped for use within an internal structure of a patient, an imaging transducer positioned within the distal portion of the flexible elongate member, an imaging marker positioned to be detectable within a field of view of the imaging transducer, and a controller in communication with the flexible elongate member and configured to adjust a control signal of the flexible elongate member based on the detection of the imaging marker in data received from the flexible elongate member in order to achieve a desired field of view for the imaging transducer.

主权项

1. An imaging device, comprising:
a flexible elongate member having a proximal portion and a distal portion, the flexible elongate member sized and shaped for use within an internal structure of a patient; an imaging transducer positioned within the distal portion of the flexible elongate member, the imaging transducer movable along a motion profile; and a housing disposed at the distal portion of the flexible elongate member, the housing comprising a first side including an integrally formed marker within a field of view of the imaging transducer at a predetermined position along the motion profile and an opposite second side that does not include a component within the field of view of the imaging transducer along the motion profile, wherein the integrally formed marker is positioned adjacent to the imaging transducer such that the marker is identifiable in image data obtained by the imaging transducer when the imaging transducer reaches the predetermined position along the motion profile; wherein the marker includes an inner surface for reflecting energy emitted from the imaging transducer; wherein a cross-section of the inner surface is curved at a proximal portion and linear at a distal portion; and wherein the inner surface of the marker is located at a shallow depth of focus of the imaging transducer that is outside a target depth of focus of the imaging transducer that contains the internal structure of the patient.