Method and device to determine the value of an x-ray tube voltage

US8687763B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ute Feuerlein · Erlangen, DE
• Sebastian Gehrsitz · Himmelstadt, DE
• Christiane Koch · Eggolsheim, DE
• Rainer Raupach · Heroldsbach, DE

Key dates

• Filing date: Nov 10, 2011
• Grant date: Apr 1, 2014
• Expiry date: Sep 17, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/481
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The value of a tube voltage of an x-ray tube, used to acquire x-ray projections of a patient in order to generate at least one image in each phase of a multiphase examination, is determined from a contrast-to-noise ratio that establishes the desired image quality of the image in each phase, and the tube current for each tube voltage for each phase is determined given a constantly maintained contrast-to-noise ratio for different tube voltages. For each phase, a value for the dose of x-ray radiation is defined for each different tube voltage and the associated determined tube current. From among the different tube voltages, a tube voltage is set that causes the total dose of x-ray radiation applied to the patient to be as low as possible for all phases of the examination.