Vascular imaging device

A method of operating a vascular imaging device, the device comprising:

• a casing, comprising a first casing portion and a second casing portion, wherein:
• the first casing portion and the second casing portion together define a gap therebetween for receiving an auricle of a subject, and wherein the second casing portion narrows in the direction of the gap;
• and
• the first casing portion is slidably movable relative to the second casing portion between an unclamped position, in which the first casing portion is moved away from the second casing portion, and a clamped position, in which the first casing portion is moved towards the second casing portion;
• a biasing member arranged to bias the first casing portion into the clamped position;
• and
• a rod that extends between the first casing portion and the second casing portion, wherein the rod is slidably mounted to the first casing portion and/or the second casing portion, so to slidably move the first casing portion relative to the second casing portion;
• a light source, mounted on the casing;
• and
• an image sensor, mounted on the casing;
• wherein the light source is arranged to transmit light to illuminate an auricle placed within the gap and the image sensor is arranged to detect light transmitted by the light source and to output image data representative of the light received at the image sensor;
• the method comprising:
• positioning an auricle of a subject within the gap;
• receiving, at the image sensor, light transmitted from the light source through, or reflected from, the auricle;
• generating, from image data provided by the image sensor, an image of blood vessels within the auricle.