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Algorithm to Simulate Increased Noise in Computed Radiography

B. Juste, J. I. Villaescusa, R. Tortosa, G. Verdú

Nuclear Technology / Volume 168 / Number 1 / October 2009 / Pages 249-252

Radiography / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radioisotopes /

This paper validates a technique to add statistical noise to a computed radiography (CR) image in order to simulate accurately how the same image would appear if taken at a reduced tube current. To that end, a noise addition simulation software has been developed in order to create lower-dose pediatric CR selecting the desired lower X-ray tube current.

The effect of different tube current settings (in milliampereseconds) on image quality has been evaluated using the CDMAM 3.4 phantom, and the obtained results show good agreement between the simulated and real images in terms of noise measurement. The new CR images allow medical researchers to study how lower dose affects the patient diagnosis without taking new images.

The developed algorithm will be used in future medical research on determining the minimum tube currents necessary for adequate diagnoses.

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