{"product_id":"correction-of-transmission-contamination-in-spect-imaging-von-subhash-chand-kheruka","title":"Correction of transmission contamination in SPECT imaging","description":"\u003cp\u003eThe transmission and emission data are acquired  simultaneously with 153Gd and 67Ga respectively.  The  distribution of scatter and spill over in  transmission window were estimated. The scatter  function, spillover and scatter fractions were  estimated at different depth in different media and  the relationship was established. The corrected  transmission projections were reconstructed and the  corrected attenuation map was scaled to take into  account the difference in photon energies of the  two  radionuclides. Combined emission images of a thorax  phantom and human volunteer were reconstructed  using  the OSEM algorithm. It was found that the bi- exponential scatter function is independent of  material and depth of source. The scatter fraction  and spillover both depend on the thickness and  density of attenuating material. Corrected  transmission data using an iterative process  improved the contrast and quantitative accuracy. We  could conclude that transmission based correction  method can be applied to improve the attenuation  map used in attenuation correction of SPECT images.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783844397130\"\u003e\u003ch3\u003eSimultaneous emission and transmission tomography with 67Ga\/153Gd\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783844397130","offer_id":39471375974493,"sku":"9783844397130","price":68.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/ef39f6df-d2ac-4253-a569-86428fefe048.jpg?v=1757828141","url":"https:\/\/shop.autorenwelt.de\/products\/correction-of-transmission-contamination-in-spect-imaging-von-subhash-chand-kheruka","provider":"Autorenwelt Shop","version":"1.0","type":"link"}