Radiological diagnostics system employing a contrast agent

• US 5,301,672 A
• Filed: 11/16/1992
• Issued: 04/12/1994
• Est. Priority Date: 12/09/1991
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Kalender, Willi
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US07/977,053
• Time in Patent Office: 512 Days
• Field of Search: 128/654, 128/653.1, 128/653.4, 128/632, 128/633, 128/665, 128/687, 378/51, 378/62, 378/64, 378/97, 378/99, 250/336.1
• US Class Current: 600/428
• CPC Class Codes: A61B 6/481 involving the use of contrast agents
• CPC Class Codes: A61B 6/504 for diagnosis of blood vessels, e.g. by angiography

Abstract

In a diagnostics system wherein a radiological image is generated of a patient who has been injected with a contrast agent, the arrival of the contrast agent bolus at the imaging site is identified either directly by detecting the contrast agent, or indirectly by detecting a dye injected with the contrast agent, so that a synchronization of the imaging exposures with the arrival of the contrast agent can be assured. If a dye is used, the dye can be an optically detectable dye which is injected via the contrast agent syringe in addition to the contrast agent. A densitometer identifies the arrival of the contrast agent or of the dye at a predetermined location of the patient, and controls triggering of the exposures.

Claims

1. A diagnostics system comprising:

means for generating a radiological image of a patient;

means for introducing a contrast agent and a contrast agent indicator into said patient;

means for identifying the in vivo concentration of said contrast agent in said patient at a predetermined location in the body of said patient by monitoring the presence of at least one of said contrast agent or said contrast agent indicator at said location, and for generating an electrical signal corresponding to said concentration; and

means for triggering generation of said radiological image when said signal reaches a predetermined level.

2. A diagnostics system as claimed in claim 1 wherein said means for introducing a contrast agent and a contrast agent indicator is a syringe system.

3. A diagnostics system as claimed in claim 1 wherein said contrast agent indicator is an optically detectable dye, and wherein said means for identifying the in vivo concentration of said contrast agent is a means for optically monitoring the presence of said optically detectable dye at said location on the body of said patient.