Medical object for arrangement in an object under examination and system for sensing a medical object

A system for sensing a medical object, the system comprising:

• the medical object for arrangement in an object under examination, the medical object comprising:
• an optical fiber configured to contact at least one light source optically;
• multiple photoacoustic absorbers that are arranged in sections along a direction of longitudinal extension of the optical fiber, along a periphery of the optical fiber, or along the direction of longitudinal extension of the optical fiber and along the periphery of the optical fiber, wherein the optical fiber comprises a sheathing, a portion of the sheathing being arranged between adjacent photoacoustic absorbers of the multiple photoacoustic absorbers, wherein the multiple photoacoustic absorbers are configured to be arranged at least in part in the object under examination, wherein the optical fiber is configured to conduct an excitation light emitted by the at least one light source to the multiple photoacoustic absorbers, and wherein the multiple photoacoustic absorbers are configured to be excited by the excitation light for photoacoustic emission of ultrasound;
• a processing unit;
• the at least one light source;
• and
• an ultrasound unit,
• wherein the at least one light source is configured to emit the excitation light,
• wherein the excitation light is configured to excite the multiple photoacoustic absorbers for the photoacoustic emission of the ultrasound,
• wherein the ultrasound unit is configured to be arranged extracorporeally on a surface of the object under examination,
• wherein the ultrasound unit is configured for detection of the ultrasound,
• wherein the processing unit is configured to determine a spatial progression of the medical object using the detected ultrasound,
• wherein in an operating state of the system:
• the optical fiber optically contacts the at least one light source;
• the multiple photoacoustic absorbers are arranged at least in part in the object under examination;
• and
• the ultrasound unit is arranged extracorporeally on the surface of the object under examination.