Split window scatter correction

A method of scatter correction for use with a gamma camera, the method comprising the steps of:

• detecting gamma radiation;
• determining the energy level of the detected radiation;
• producing a first count value indicative of the gamma radiation falling within a first energy range, the first energy range including a radionuclide photopeak;
• producing only a second count value indicative of the gamma radiation falling within second and third non-contiguous energy ranges;
• estimating, based on the second count value, a scatter count value representative of scattering radiation falling within the first energy range;
• and
• correcting the first count value based on the scatter count value.

A method of scatter correction for use with a gamma camera, the method comprising the steps of:

• detecting gamma radiation falling within a first energy range;
• producing a first count value indicative of the gamma radiation falling within the first energy range;
• detecting gamma radiation falling within a second energy range, the second energy range being determined based on the energy resolution of the gamma camera;
• producing a count indicative of radiation falling within the second energy range;
• estimating, based on the count of radiation falling within the second energy range, a scatter count representative of scattering radiation falling within the first energy range;
• and
• correcting the first count value based on the scatter count value.

A method of scatter correction for use with a gamma camera, the method comprising the steps of:

• detecting gamma radiation falling within a first energy range;
• producing a first count value indicative of the gamma radiation falling within the first energy range;
• detecting gamma radiation falling within a second energy range;
• producing a count indicative of radiation falling within the second energy range, the second energy range being determined such that a predetermined percentage of counts falling within the second energy range is from primary photons from within the first range;
• estimating, based on the count of radiation falling within at least the second energy range, a scatter count representative of scattering radiation falling within the first energy range;
• and
• correcting the first count value based on the scatter count value.

A gamma camera comprising:

• means for detecting gamma radiation falling within a first energy range;
• means for producing a first count value indicative of the gamma radiation falling within the first energy range;
• means for detecting gamma radiation falling within a second energy range, the second energy range being determined based on the energy resolution of the gamma camera and separated in energy from the first energy range;
• means for producing a count indicative of radiation falling within the second energy range;
• means for estimating, based on the count of radiation falling within the second energy range, a scatter count representative of scattering radiation failing within the first energy range;
• and
• means for correcting the first count value based on the scatter count value.

A gamma camera comprising:

• means for detecting gamma radiation;
• means for determining the energy level of the detected radiation;
• producing a first count value indicative of the gamma radiation falling with a first energy range which includes a radionuclide photopeak;
• means for producing only a second count value indicative of the gamma radiation falling within second and third non-contiguous energy ranges being below and above a radionuclide photopeak, respectively;
• means for estimating, based on the second count value, a scatter count value representative of scattering radiation falling within the first energy range;
• and
• means for correcting the first count value based on the scatter count value .