Method of selecting a preferred difference image
Patent 4335427 Issued on June 15, 1982. Estimated Expiration Date: 
April 21, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 21, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3283071 3894181 Differential X-ray method and apparatus Real-time digital X-ray subtraction imaging Real-time digital X-ray time interval difference imaging Tomographic imaging system Patent #: 4212062 InventorsAssigneeApplicationNo. 06/142188 filed on 04/21/1980US Classes:600/407, Detecting nuclear, electromagnetic, or ultrasonic radiation378/98.12, With image subtraction or addition382/130Producing difference image (e.g., angiography)ExaminersPrimary: Krass, Errol A.Attorney, Agent or FirmInternational ClassesG06T 5/50 (20060101)H04N 5/32 (20060101) AbstractIn a radiographic digital subtraction system utilizing a contrast agent for enhancing a difficult-to-image anatomic region of interest, a method of selecting a superior difference image. The difference image selected represents the differential between a pair of digitized radiographic images selected from a series of such images acquired before and after the contrast appears in the region of interest during a dynamic imaging study.Other References
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