Back to results
US 2017/0360398 A1Published application
Non-uniform rotational distortion detection catheter system
AssigneeCanon U.S.A., Inc.
InventorsMark Alan Hamm, Bin Wu, Albert Dunfee, Badr Elmaanaoui
Life of this patent
Estimating the term…
Abstract
Exemplary probes including longitudinal marker elements arranged parallel to the probe axis are provided for reducing or eliminating non-uniform rotational distortions (NURD) in imaging systems. Additional ring marker elements may also be provided to reduce or eliminate non-uniform linear distortion (NULD). These probes, as well as systems and methods of use provide for images having better image quality and reduced NURD.
Claims20
A probe comprising:
- a rotatable imaging core comprising an imaging component and having a rotational axis;
- a cylindrical tube surrounding the imaging core, having the same rotational axis and having a proximal end, a distal end, and a lumen extending therebetween, the distal end of the cylindrical tube comprising:
- an imaging window, and
- a plurality of longitudinal marker elements integral with or attached to the imaging window and arranged parallel to the rotational axis,
- wherein the plurality of marker elements do not substantially interfere with imaging detector performance.
2 more elements
An imaging catheter system comprising:
- a rotatable imaging core comprising an imaging component and having a rotational axis;
- a cylindrical tube surrounding the imaging core, having the same rotational axis and having a proximal end, a distal end, and a lumen extending therebetween, the distal end of the cylindrical tube comprising:
- an imaging window, and
- a plurality of longitudinal marker elements integral with or attached to the imaging window and arranged parallel to the rotational axis,
- a patient interface unit connected to the proximal end of the cylindrical tube,
- at least one detector, and
- an imaging console connected to the patient interface unit.
- wherein the plurality of marker elements do not substantially interfere with imaging detector performance.
5 more elements
A method of monitoring non-uniform rotational distortion (NURD) comprising:
- (a) rotating the imaging core of probe, where the probe comprises:
- the rotatable imaging core comprising an imaging component and having a rotational axis;
- a cylindrical tube surrounding the imaging core, having the same rotational axis and having a proximal end, a distal end, and a lumen extending therebetween, the distal end of the cylindrical tube comprising:
- an imaging window, and
- a plurality of longitudinal marker elements integral with or attached to the imaging window and arranged parallel to the rotational axis,
- (b) obtaining a raw image,
- (c) determining at least one of the apparent angular position of at least two of the plurality of longitudinal marker elements or the timing between signals from at least two of the plurality of longitudinal marker elements, and
- (d) computing the difference between the relative angular position and a theoretical angular position based on average rotational speed for the longitudinal marker elements.
5 more elements
Dependencies are inferred from the claim text.