Upon completion the technologist should be able to list the types of acquisition modes for nuclear medicine studies choose the best acquisition mode for any. 22 3 11 this is the first article in a four part series on computers in nuclear medicine. J nucl med techno 1994.
Computers nuclear medicine studies digital images. The quality of spect images are degraded by several factors such as noise because of the limited number of counts attenuation or scatter of photons. Single photon emission computed tomography spect imaging is widely implemented in nuclear medicine as its clinical role in the diagnosis and management of several diseases is many times very helpful e g myocardium perfusion imaging.
The data analyzed by using matlab program to enhance the contrast within the soft tissues the gray levels in both enhanced and unenhanced images and noise variance. Nuclear medicine images such as grey color and to evaluate the usage of new nonlinear approach for contrast enhancement of soft tissues in nuclear medicine images. Although these filters have been available for many years they have not been routinely used to improve image quality and allow.
Early attempts were to reduce the noise and improve resolution by the use of deconvolution filters such as the metz or weiner filters. Image restoration in nuclear medicine has been of interest for many years. The detector and the recorder systems together determine the two aspects of noise magnitude and texture metz 1969 1970 metz and beck 1974 but each operates on the noise in a different manner.
Develop a formal and quantitative description of the recorded image noise in nuclear medicine. 8 in summary the sni is based on frequency based two dimensional 2d noise power spectrum nps. The sni was developed in a previous project for quantifying nuclear medicine flood field uniformity images with regard to the presence of nonuniformities detailed in an earlier publication.
We developed a noise reduction approach that estimates signal and noise levels in each of several. Common methods of reducing random noise in nuclear medicine use lowpass filtering which has the disadvantage that it affects high frequency components of the image. Kuni cc hasegawa bh hendee wr.
Noise reduction in nuclear medicine images.
Noise in nuclear medicine images. Technical factors include the properties of the equipment used acquisition protocol image processing image noise spatial resolution and scattered radiation. To ensure the best possible use of available resources various technical factors involved in a nuclear medicine investigation should be optimized for every type of examination. Three such characteristics that are used for nuclear medicine image quality are 1 spatial resolution detail or sharpness 2 contrast difference in image density or intensity between areas of the imaged object containing different concentrations of radioactivity and 3 noise statistical noise caused by random fluctuations in. Image quality in nuclear medicine spatial resolution contrast and noise evaluation of detection and observer performance quality assurance of imaging instrume slideshare uses cookies to improve functionality and performance and to provide you with relevant advertising.
Image quality in nuclear medicine spatial resolution contrast and noise evaluation of detection and observer performance quality assurance of imaging instrume slideshare uses cookies to improve functionality and performance and to provide you with relevant advertising. Three such characteristics that are used for nuclear medicine image quality are 1 spatial resolution detail or sharpness 2 contrast difference in image density or intensity between areas of the imaged object containing different concentrations of radioactivity and 3 noise statistical noise caused by random fluctuations in. To ensure the best possible use of available resources various technical factors involved in a nuclear medicine investigation should be optimized for every type of examination.
Technical factors include the properties of the equipment used acquisition protocol image processing image noise spatial resolution and scattered radiation.
