Determining angular orientation for imaging
The present disclosure provides an OCT imaging system having a variety of advantages. In particular, the OCT system of the present disclosure may provide a more intuitive interface, more efficient usage of controls, and a greater ability to view OCT imaging data.
1. A rotary imaging system for imaging a sample, the system comprising:
a rotary junction that during operation generates a plurality of image frames of the sample and angular rotational position signals, wherein each angular rotational position signal corresponds to an image frame within a plurality of the image frames and each rotational position signal is generated based on a known position of the rotary junction such that acquisition of each image frame is synchronized to the corresponding known position of the rotary junction;
an optical engine coupled to the rotary junction to receive the image frames acquired using the rotary junction of the rotary imaging system;
a data acquisition system coupled to the rotary junction to receive the rotational position signals and align an orientation of the image frames based on the angular rotational position signals, wherein synchronizing acquisition comprises synchronizing acquisition of a first one of the plurality of image frames with a first one of the rotational position signals and synchronizing acquisition of a second one of the plurality of image frames with a second one of the rotational position signals.
2. The rotary imaging system of claim 1 , wherein (i) the rotary junction is a fiber optic rotating junction (FORJ) and (ii) the image is adquired using the FORJ, and (iii) the data acquisition system is capable of determining a measure of angular rotation corresponding to the image from an indication of a rotation speed of the FORJ.
3. The rotary imaging system of claim 1 , wherein (i) the rotary junction is a fiber optic rotating junction (FORJ) and (ii) the image is adquired using the FORJ, and the set of determining a measure of the angular rotation corresponding to the image comprises receiving an indication of a position of the FORJ.
4. The rotary imaging system claim 1 , wherein the image is adquired using a fiber optic rotating junction (FORJ), and (iii) the data acquisition system is capable of determining a measure of the angular rotation corresponding to the image from an indication of a rotational speed and a position of the FORJ.
5. The rotary imaging system of claim 4 , wherein the data acquisition system is capable of determining an indication of the rotation speed and the position of the FORJ from a signal from one or more sensors operably coupled to the FORJ, the signal corresponding to a fixed point of the rotation of the FORJ.
6. The rotary imaging system of claim 1 , further comprising initiating acquisition of the image, wherein to align orientation of the image comprises to synchronize initiating acquisition of each of the images based on respective determined measures of angular rotation.
7. The rotary imaging system of claim 1 , wherein the signal is an optical signal and the rotary imaging system is an optical coherence tomography (OCT) system.
8. The rotary imaging system of claim 7 , wherein the OCT system is a frequency-domain OCT system.