Smooth dot density spatial distortion correction in photon imagi

Details Smooth dot density spatial distortion correction in photon imagi Smooth dot density spatial distortion correction in photon imagi

1986-04-08

1989-02-28

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

36441324, G01T 120, G06F 1542

Patent

active

048088269

ABSTRACT:
In scintillation cameras, spatial or linearity correction is accomplished utilizing a weighted average of correction vectors in the region of the apparent location of scintillation events. Such vectors are developed in a calibration step using a pinhole or slot apertured mask. On the fly, vectors beyond those next adjacent the apparent location are used for correction, which are constrained to exhibit continuity in both the functional value, and at a minimum the first derivative, but which may include continuity in higher order derivatives also. One such correction function, which insures continuity in both the functional value and its first derivative, is called a Hermite interpolation function.

REFERENCES:
patent: 4212061 (1980-07-01), Kroll et al.
patent: 4611283 (1986-09-01), Lumelsky et al.
patent: 4686634 (1987-08-01), Schrieber

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