ANSI N42.27:1999 pdf download. Determination Of Uniformity Of Solid Gamma-Emitting Flood Sources.
Abstract: Minimum informational requirements for a Test and Measurement Report for flood sources used with scintillation cameras are provided. It is not intended to specify the means by which such information is obtained although it does place requirements and limitations on the methodology. In addition, it is not intended to cover the use of the source in the determination of the operating characteristics or correction factors for a scintillation camera.
Keywords: flood source, nuclear medicine, quality control, scintillation camera, sealed source, Test and Measurement Report, unit cell, useful region.
Nuclear mcdicinc practitioners use solid, uniformly radioactive sources that are several millimeters thick with areas up to 0.25 m2 (called flood” sources) to characterize and correct the extrinsic flood field uniformity of scintillation cameras for purposes of both quality assurance and on-line operational corrections. These radioactive sources are intended to produce a uniform radiation field across the camera’s usable held of view. Methods to evaluate camera uniformity are described in NEMA NU l_l994.I
A broad range of fl(x sources is available in many sizes and configurations from a number of manufacturers. Such diversity suggests the need for a uniform means of reporting calibration data and a common understanding of the parameters reported. This information can permit intercomparison of sources and give practitioners a means to determine whether a particular source is appropriate for a given II%k.
1.1 Scope
The scope of this standard is limited to commercially-produced, solid radIoactive flood sources intended to aid in the dctenuination of the system field uniformity of scintillation cameras used in nuclear medicine.
This standard is intended to provide a set of minimum informational requirements for a Test and Measurement Report for flood sources used with scintillation cameras. It is not intended to specify the means by which such information is obtained, although it does place requirements and limita(ions on the methodology. In addition, it is not intended to cover the use of the source in the determination of the operating characteristics or correction factors for a scintillation camera.
1.2 Special word usage
The words shall or must indicate a procedure that is necessary to meet the requirements of this standard. The words should or may indicate an advisory recommendation that is to be applied when practicable.