UW Radiological Sciences Training Program
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1.Adaptation of Dictionary Learning for Electrode Displacement Elastography
- 关键词:
- PERCUTANEOUS MICROWAVE ABLATION; RADIOFREQUENCY ABLATION; STRAIN ESTIMATION; EFFICACY; SAFETY; TUMORS
- Pohlman, Robert M.;Varghese, Tomy
- 《42ND ANNUAL INTERNATIONAL CONFERENCES OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY: ENABLING INNOVATIVE TECHNOLOGIES FOR GLOBAL HEALTHCARE EMBC'20》
- 2020年
- 会议
Microwave ablation has become a common treatment method for liver cancers. Unfortunately, microwave ablation success is correlated with clinician's ability for proper electrode placement and assess ablative margins, requiring accurate imaging of liver tumors and ablated zones. Conventionally, ultrasound and computed tomography are utilized for this purpose, yet both have their respective drawbacks. As an alternate approach, electrode displacement elastography offers promise but is still plagued by decorrelation artifacts reducing lesion depiction and visualization. A recent filtering method, namely dictionary representation, has improved contrast-to-noise ratios without reducing delineation contrast. As a supplement to this recent work, this paper evaluates adaptations on this initial dictionary-learning algorithm and applies them to an EDE phantom and 15 in-vivo patient datasets. Two new adaptations of dictionary representations were evaluated, namely a combined dictionary and magnitude-based dictionary representation. When comparing numerical results, the combined dictionary representation algorithm outperforms the previous developed dictionary representation in signal-to- noise (1.54 dB) and contrast-to-noise (0.67 dB) ratios, while a magnitude dictionary representation produces higher noise levels, but improves visualized strain tensor resolution.
...2.Temporal Correlations between Cervical Smooth Muscle Force Generation and Acoustic Backscatter Coefficient Parameters
- 关键词:
- Backscattering;Electrostatic devices;Correlation methods;Backscatter coefficients;Pearson correlation coefficients;Quantitative ultrasounds;Scatterer size;Smooth muscle functions;Smooth muscles;Temporal correlations;Uterine cervix
- Santoso, Andrew;Vink, Joy;Gallos, George;Feltovich, Helen;Hall, Timothy
- 《2018 IEEE International Ultrasonics Symposium, IUS 2018》
- 2018年
- October 22, 2018 - October 25, 2018
- Kobe, Japan
- 会议
In this work, we extend our novel understanding of smooth muscle in the uterine cervix by assessing if Quantitative Ultrasound (QUS)backscatter parameters correlate with muscle force generation using Pearson correlation coefficients r. Specific parameters investigated were the effective scatterer diameter (ESD)and average backscatter coefficient (ABSC), which quantify the frequency dependence and magnitude of backscatter, respectively. It was determined that correlations between force and ESD were substantial (median r=0.88)in time windows shortly after (5 minutes)administration of a contractile agent. This work provides evidence that QUS backscatter parameters may serve as a non-invasive biomarker of the cervical smooth muscle function. © 2018 IEEE.
...3.A Geometric Model Based On Acoustic Backscatter Coefficients to Assess Anisotropic Scattering in Phantoms and Skeletal Muscle
- Santoso, A.;Guerrero, Q.;Rosado-Mendez, I.;Hall, T.
- 《60th Annual Meeting of theAmerican-Association-of-Physicists-in-Medicine》
- 2018年
- JUL 29-AUG 02, 2018
- Nashville, TN
- 会议
4.Antibody and Fragment-Based PET Imaging of CTLA-4+T-Cells in Humanized Mouse Models
- Ehlerding, E.;Lee, H.;Jiang, D.;Ferreira, C.;Engle, J.;Cai, W.
- 《60th Annual Meeting of theAmerican-Association-of-Physicists-in-Medicine》
- 2018年
- JUL 29-AUG 02, 2018
- Nashville, TN
- 会议
5.Theranostics of Murine Breast Cancer with a 86/90Y-Labeled Antibody
- Ehlerding, E.;Ferreira, C.;Aluicio-Sarduy, E.;Jiang, D.;Engle, J.;Cai, W.
- 《60th Annual Meeting of theAmerican-Association-of-Physicists-in-Medicine》
- 2018年
- JUL 29-AUG 02, 2018
- Nashville, TN
- 会议
6.The Dosimetric Effect of Motion Management System Latency On Radiotherapy Treatments
- Shepard, A.;Matrosic, C.;Radtke, J.;Culberson, W.;Bednarz, B.
- 《60th Annual Meeting of theAmerican-Association-of-Physicists-in-Medicine》
- 2018年
- JUL 29-AUG 02, 2018
- Nashville, TN
- 会议
7.Linac Triggering Latency Quantification for Consideration in Intra-Fraction Motion Management Systems
- Shepard, A.;Matrosic, C.;Jupitz, S.;Radtke, J.;Culberson, W.;Bednarz, B.
- 《60th Annual Meeting of theAmerican-Association-of-Physicists-in-Medicine》
- 2018年
- JUL 29-AUG 02, 2018
- Nashville, TN
- 会议
