Optimized aperture selection imaging computed tomography system and method

A method of operating imaging computed tomography using at least one radiation source and at least one detector to generate an image of an object, the method comprising:

• defining desired image characteristics to provide at least one of:
• desired image quality in at least one region of interest;
• and at least one desired distribution of image quality;
• performing calculations to determine a pattern of fluence to be applied by the at least one radiation source to generate the desired image characteristics;
• and
• modulating the at least one radiation source to generate the pattern of fluence,
• wherein the desired image characteristics comprise desired spatial uniformity of noise, and
• wherein the desired spatial uniformity of noise is defined by considering at least one attribute of a two-dimensional or a three-dimensional noise power spectrum.

A method of operating imaging computed tomography using at least one radiation source and at least one detector to generate an image of an object, the method comprising:

• defining desired image characteristics to provide at least one of:
• desired image quality in at least one region of interest;
• and at least one desired distribution of image quality;
• performing calculations to determine a pattern of fluence to be applied by the at least one radiation source to generate the desired image characteristics;
• and
• modulating the at least one radiation source to generate the pattern of fluence,
• wherein the step of performing calculations comprises at least one of:
• optimizing energy fluence to enhance contrast;
• and optimizing photon fluence to reduce scatter.