Zobrazeno 1 - 10
of 11
pro vyhledávání: '"D R, Gilland"'
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 41(4)
The goal of this research was to develop and evaluate a practical transmission scanning system for attenuation correction on a 2-head gamma camera coincidence scanner.The transmission system operates in singles mode and uses point sources of 137Cs th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::6deb9cc33a0a289b2cbfa9735874fb57
https://pubmed.ncbi.nlm.nih.gov/10768571
https://pubmed.ncbi.nlm.nih.gov/10768571
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 39(6)
Our objective was to build and test a new system for transmission CT (TCT) imaging on a three-headed SPECT camera. The TCT images are intended for use in nonuniform attenuation correction of cardiac SPECT data.The system consists of a transmission li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::96fdb25b8871f627204b74467e83d3dd
https://pubmed.ncbi.nlm.nih.gov/9627354
https://pubmed.ncbi.nlm.nih.gov/9627354
Quantitative imaging of iodine-131 distributions in brain tumors with pinhole SPECT: a phantom study
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 39(5)
A method of quantitatively imaging 131I distributions in brain tumors from intratumoral administration of activity was developed and investigated using pinhole SPECT of brain tumor phantoms.Pinhole SPECT sensitivity and resolution were characterized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::69b633ba6858a8a6c8b781741d80013c
https://pubmed.ncbi.nlm.nih.gov/9591589
https://pubmed.ncbi.nlm.nih.gov/9591589
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 39(2)
The purpose of this study was to evaluate the effects of patient motion on nonuniform attenuation correction of cardiac SPECT when the transmission and emission scans were performed sequentially. By using a sequential protocol rather than doing the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::afaa2a7f0c3f9acc0e464cab9c43e7bf
https://pubmed.ncbi.nlm.nih.gov/9476952
https://pubmed.ncbi.nlm.nih.gov/9476952
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 36(2)
This study evaluates the quantitative accuracy of SPECT for in vivo distributions of 99mTc radiopharmaceuticals using fanbeam (FB) and parallel-beam (PB) collimators and compares uniform and nonuniform attenuation correction methods in terms of quant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::3ef5013867af5fbb98ce2e5e03a38c34
https://pubmed.ncbi.nlm.nih.gov/7830132
https://pubmed.ncbi.nlm.nih.gov/7830132
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 35(10)
The goals of this study were to investigate the effect of septal penetration on 123I SPECT activity quantitation using low-energy, high-resolution collimators, and to evaluate a semi-automatic method for measuring volume and activity of 123I distribu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::54a39a4d8e548b1788150162aa679f9f
https://pubmed.ncbi.nlm.nih.gov/7931675
https://pubmed.ncbi.nlm.nih.gov/7931675
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 34(9)
We describe a technique using a line source and a rotatable air-copper-lead assembly to acquire gamma transmission computed tomographic (TCT) data for determining attenuation maps to compensate SPECT emission scans. The technique minimizes problems a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::090d470d575a887e8610ffbd61af8f8c
https://pubmed.ncbi.nlm.nih.gov/8355079
https://pubmed.ncbi.nlm.nih.gov/8355079
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 33(3)
A ROC study was performed in order to evaluate whether the maximum likelihood expectation maximization (ML-EM) reconstruction algorithm improves diagnostic performance compared to the conventional filtered backprojection method in SPECT. Several impl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c7f2578d26bcd446e51e149fb5d864d1
https://pubmed.ncbi.nlm.nih.gov/1740719
https://pubmed.ncbi.nlm.nih.gov/1740719
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 32(3)
Many clinical and research studies in nuclear medicine require quantitation of iodine-123 (123I) distribution for the determination of kinetics or localization. The objective of this study was to implement several reconstruction methods designed for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::88ab5adcb4677f4654a22bb75b331544
https://pubmed.ncbi.nlm.nih.gov/2005465
https://pubmed.ncbi.nlm.nih.gov/2005465
Publikováno v:
Journal of nuclear medicine : official publication, Society of Nuclear Medicine. 29(5)
An observer study was performed in order to evaluate several filters used in SPECT imaging. The filters were applied to the simulated projection data of a uniform activity density cylinder which contained a cold, spherical lesion, 2 cm in diameter. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::da91a2cf080edaa094fe2366be020bbd
https://pubmed.ncbi.nlm.nih.gov/3259624
https://pubmed.ncbi.nlm.nih.gov/3259624