Nonlinear partial volume artifact correction in helical CT

1999 ◽  
Vol 46 (3) ◽  
pp. 743-747 ◽  
Author(s):  
J. Hsieh
Keyword(s):  
Helical Ct ◽  
Artifact Correction ◽  
Partial Volume

1716: Pharmaco-Angio-CT is Superior to 4 Phase Helical CT in the Detection of Recurrent Metastatic Renal Cell Carcinoma

2006 ◽  
Vol 175 (4S) ◽  
pp. 551-552
Author(s):  
Erich K. Lang ◽  
Richard J. Macchia ◽  
Raju Thomas ◽  
Ronald Davis ◽  
Douglas Slakey ◽  
...  
Keyword(s):  
Renal Cell Carcinoma ◽  
Cell Carcinoma ◽  
Metastatic Renal Cell Carcinoma ◽  
Renal Cell ◽  
Helical Ct ◽  
Angio Ct

910: Evaluation of Pelvic Floor Reconstructive Surgery Using Tridimentional Helical CT

2006 ◽  
Vol 175 (4S) ◽  
pp. 294-295
Author(s):  
Paulo Palma ◽  
Cassio L. Riccetto ◽  
Miriam Dambros ◽  
Rogerio Fraga ◽  
Ricardo Maia ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
Reconstructive Surgery ◽  
Helical Ct

Quantitative accuracy of serotonergic neurotrans-mission imaging with high-resolution 123I SPECT

2004 ◽  
Vol 43 (06) ◽  
pp. 185-189 ◽  
Author(s):  
J. T. Kuikka
Keyword(s):  
High Resolution ◽  
Scatter Correction ◽  
Region Of Interest ◽  
Binding Potential ◽  
Partial Volume ◽  
Therapeutic Drugs ◽  
Quantitative Accuracy ◽  
Critical Error ◽  
Statistical Noise

Summary Aim: Serotonin transporter (SERT) imaging can be used to study the role of regional abnormalities of neurotransmitter release in various mental disorders and to study the mechanism of action of therapeutic drugs or drugs’ abuse. We examine the quantitative accuracy and reproducibility that can be achieved with high-resolution SPECT of serotonergic neurotransmission. Method: Binding potential (BP) of 123I labeled tracer specific for midbrain SERT was assessed in 20 healthy persons. The effects of scatter, attenuation, partial volume, mis-registration and statistical noise were estimated using phantom and human studies. Results: Without any correction, BP was underestimated by 73%. The partial volume error was the major component in this underestimation whereas the most critical error for the reproducibility was misplacement of region of interest (ROI). Conclusion: The proper ROI registration, the use of the multiple head gamma camera with transmission based scatter correction introduce more relevant results. However, due to the small dimensions of the midbrain SERT structures and poor spatial resolution of SPECT, the improvement without the partial volume correction is not great enough to restore the estimate of BP to that of the true one.

Focal Nodular Hyperplasia of the Liver: Triphasic Helical CT Findings

2003 ◽  
Vol 49 (3) ◽  
pp. 181
Author(s):  
Jin Wook Lee ◽  
Won Jae Lee ◽  
Jae Min Cho ◽  
Min Hee Lee ◽  
Hyo K Lim ◽  
...  
Keyword(s):  
Focal Nodular Hyperplasia ◽  
Helical Ct ◽  
Ct Findings ◽  
Nodular Hyperplasia
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