Method to calibrate a light unit, storage medium, aperture plate and medical imaging apparatus

US10973604B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Ferdinand Distler · Erlangen, DE
• Matthias BAER-BECK · Spardorf, DE
• Jochen Ostermaier · Erlangen, DE
• Volker That · Forchheim, DE
• Frauke Eenboom · Erlangen, DE
• Kay Uwe Seemann · Erlangen, DE

Key dates

• Filing date: Jul 22, 2020
• Grant date: Apr 13, 2021
• Expiry date: Jul 22, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B21/2033
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method is used to calibrate a light unit, including at least one light source, the light unit being part of a medical imaging apparatus. In an embodiment, the method includes positioning a calibration phantom at a calibration position, in particular a first calibration position; arranging the light source so that its beam illuminates the photodetector at least partially; starting or continuing the recording of light intensities using the photodetector; modulating the signal of the light source at least once; rotating the light beam around a given rotation axis while recording the rotational position; synchronizing the time values of the rotational position of the light beam and the acquired signal intensities using the modulation of the light signal; and mapping the rotational position, in particular the rotation angle, of the light beam to a spatial position using the light intensities recorded by the photodetector.