Radiation Oncology

R Alfredo Siochi, PhD

Portrait

Clinical Assistant Professor of Radiation Oncology
Clinical Assistant Professor of Electrical and Computer Engineering, Physics and Astronomy

Contact Information

Email: ralfredo-siochi@uiowa.edu

Education

BS, Physics, Ateneo de Mainila University, Quezon City, Philippines
MS, Physics, Virginia Tech, Blacksburg, Virginia
PhD, Physics, Virginia Tech, Blacksburg, Virginia
MS, Medical Physics, University of Cincinnati, Cincinnati, Ohio

Licensure and Certifications

American Board of Radiology in Radiological Physics, American Board of Radiology

Education/Training Program Affiliations

Biosciences Graduate Program

Research Summary

Motion Management in Radiation Therapy and Process Improvement via Information Technology Innovations

All Publications

Siochi R, Swerdloff S.  Connectivity, Chapter 10.  Taylor and Francis.  2013 June. 

Starkschall G, Siochi R.  Informatics in Radiation Oncology.  Taylor and Francis;  2013  June.

Siochi R.  Information Resources in Radiation Oncology, Chapter 11.  Taylor and Francis.  2013 June. 

Chen M, Bai J, Siochi R.  A new method of diaphragm apex motion detection from 2D projection images of mega-voltage cone beam CT.  Physics in Medicine and Biology.  2013 February. 58(3):715-733.
[PubMed]

Chen M, Zheng Y, Cao K, Siochi R.  Motion-Compensated Mega-Voltage Cone Beam CT Using the Deformation Derived Directly From 2D Projection Images.  IEEE Transactions on Medical Imaging;  2012. 

Siochi R.  A Real-time respiratory motion monitoring system using Kinect: proof of concept.  Journal of Medical Physics.  2012 May. 39(5):2682-2685.
[PubMed]

Chen M, Bai J, Zheng Y, Siochi R.  3D lung tumor motion model extraction from 2D projection images of mega-voltage cone beam CT via optimal graph search.  International Conference on Medical Image Computing and Computer Assisted Intervention.  2012. 15(1):239-246.
[PubMed]

Bayouth J, Huang Y, Flynn R, Siochi R.  A Clinical Review of the Dosimetric and Temporal Impact of Unflattened X‐ Ray Beams.  Journal of Medical Physics.  2012. 39:3862.

Xia J, Siochi R.  A Prototype of a Real‐Time Respiratory Motion Monitoring System Using Microsoft Kinect Sensor.  Journal of Medical Physics.  2012. 39(3689).

Huang Y, Siochi R, Bayouth J.  Dosimetric properties of a beam quality-matched 6 MV unflattened photon beam..  Journal of Applied Clinical Medical Physics.  2012. 13(4):3701.
[PubMed]

Siochi R.  PITSTOP: Process Improvement Techniques, Software Tools, and Operating Principles for a Quality Initiative Discovery Framework.  Journal of Medical Physics.  2012. 39:3747.

Siochi R, Balter P, Bloch C, Blodgett K, Curran B, Engelsman M, Feng W, Mechalakos K, Pavord D, Santanam L, Simon T, Sutlief S, Zhu X.  A rapid communication from the American Association of Physicists in Medicine Task Group 201: Recommendations for the QA of External Beam Radiotherapy Data Transfer.  Journal of Applied Clinical Medical Physics.  2011. 12(1):3479.
[PubMed]

Chen M, Siochi R.  Feasibility of Using Respiratory Sorted Mega Voltage Cone Beam Computed Tomography to Measure Tumor Motion.  Journal of Applied Clinical Medical Physics.  2011. 12(2):3473.
[PubMed]

Pimenta-Neves W, Siochi R.  Sistemas de gestão da documentação, registro da informação e segurança, Chapter 7.  Associação Brasileira de Física Médica.  2011. 

Siochi R.  In Regards to Dr. Redmond et al.  International Journal of Radiation Oncology Biology Physics.  2010 August. 77(5):1605.
[PubMed]

Siochi R, Chen M.  Diaphragm Motion Quantification in megavoltage cone-beam CT Projection Images.  Journal of Medical Physics.  2010 May. 37(5):2312-2320.
[PubMed]

Chen M, Siochi R.  A clinical feasibility study on respiratory sorted megavoltage cone beam CT.  The Third International Workshop on Pulmonary Image Analysis; Beijing, China: CreateSpace.  2010. 

Siochi R.  Order Up More Images.  Advance for Imaging and Radiation Oncology.  2010. 20(4):17.

Siochi R, Balter P, Bloch C, Bushe H, Curran B, Feng W, Kagadis G, Kirby T, Mayo C, Stern R.  Information technology resource management in radiation oncology.  Journal of Applied Clinical Medical Physics.  2009 September. 10(4):16-35.

Siochi R, Brack C, Orton C.  Point/Counterpoint: The chief Information Technology officer in a Radiation Oncology department should be a medical physicist.  Journal of Medical Physics.  2009 September. 36(9):3863-3865.
[PubMed]

Siochi R.  Deriving motion from megavoltage localization cone beam computed tomography scans.  Physics in Medicine and Biology.  2009 July. 54(13):4195-4212.
[PubMed]

Flynn R, Hartmann J, Bani-Hashemi A, Nixon E, Siochi R, Pennington E, Bayouth J.  Dosimetric characterization and application of an imaging beam line with a carbon electron target for megavoltage cone beam computed tomography.  2009 June. 36(6):2181-2192.
[PubMed]

Siochi R.  Leakage reduction for the Siemens Moduleaf.  Journal of Applied Clinical Medical Physics.  2009 April. 10(2):2894.
[PubMed]

Siochi R.  Optimized removal of the tongue-and-groove underdose via constrained partial synchronization and variable depth recursion.  Physics in Medicine and Biology.  2009 March. 54(5):1369-1381.
[PubMed]

Siochi R, Pennington E, Waldron T, Bayouth J.  Radiation therapy plan checks in a paperless clinic.  Journal of Applied Clinical Medical Physics.  2009 January. 10(1):2905.
[PubMed]

Bylund K, Bayouth J, Smith M, Siochi R, Buatti J.  Geometric and Dosimetric Impact of Interfraction Prostate Motion Measured with Megavoltage Cone Beam CT.  International Journal Of Radiation Oncology Biology Physics.  2008. 72:S338.

Olson A, Bhatia S, Jacobson G, Modrick J, Kim Y, Siochi R.  High-dose-rate brachytherapy for carcinoma of the uterine cervix: A comparison of fractionation schemes and development of acute toxicity.  Brachytherapy.  2008. 2(7):154-155.

Song Q, Yin Y, Chen M, Kim Y, Bayouth J, Buatti J, Siochi R, Sonka M, Wu X.  Simultaneous Segmentation of Bladder and Prostate using Globally Optimal 3-D Graph Search Method.  International Journal Of Radiation Oncology Biology Physics.  2008. 72:S148.

Siochi R, Kim Y, Bhatia S.  Tumor Control Probability (TCP) Reduction in Phase Gated RT Treatments of Non-Small-Cell Lung Cancer (NSCLC) Tumor with Motion in Excess of Planned Motion.  International Journal Of Radiation Oncology Biology Physics.  2008. 72:S49.

Monroe W, Kim Y, Christensen G, Wu X, Bayouth J, Bhatia S, McGuire S, Siochi R, Waldron T.  Using Small-Deformation Linear-Elastic Registration to Quantifying Ventilation-Competent Lung Imaging from Clinical 4DCT Datasets: Toward Selective Avoidance IMRT for Locally Advanced Non-Small-Cell Lung Cancer.  2008. 

Bayouth J, Bylund K, Siochi R.  Validation of Treatment Planning and Delivery in Conventional Linear Accelerator Without Flattening Filter.  2008. 

Siochi R.  A variable depth recursion algorithm for leaf sequencing.  Journal of Medical Physics.  2007 February. 34(5):664-672.
[PubMed]

Siochi R.  A Projection Point Tracking Method for Gated 4DRT Validation.  2007. 

Nixon E, Shukla H, Siochi R, Bayouth J.  Evaluation of CT Extended Field of View Imaging Impact on Radiation Therapy Treatment Planning.  2007. 

Bayouth J, Shukla H, Pavord D, Nixon E, Siochi R.  Treatment Planning Modeling and Dose Delivery Advantage of Standard Linac Without Flattening Filter.  2007. 

Bayouth J, Sample J, Waldron T, Siochi R.  Evaluation of 4DRT: CT Acquisition and Gated Delivery System.  2006. 

Siochi R.  Optimized Removal of the Tongue-and-Groove Underdose Via Constrained Partial Synchronization and Variable Depth Recursion.  2006. 

Siochi R.  Validation of 4D Radiation Therapy.  2006. 

Siochi R.  Simplifying IMRT plans through efficient segmentation.  Journal of Medical Physics.  2005. 32:2085.

Siochi R.  Modifications to the IMFAST leaf sequencing optimization algorithm.  Journal of Medical Physics.  2004 December. 31(12):3267-3278.
[PubMed]

Bayouth J, Celi J, Hoban P, Marles A, Siochi R, Yang J.  An Introduction to IMRT.  2004.  Available from: www.oncolink.org/treatment/article.cfm?c=5&s=33&id=225

Siochi R, Bayouth J, Yang J, Celi J.  IMRT Plans Quality Assurance.  Malvern, PA: Siemens Medical Solutions.  2004. 

Yang J, Celi J, Bayouth J, Siochi R.  LINAC Calibration and QA for Cinematic IMRT.  Malvern, PA: Siemens Medical Solutions.  2004. 

Siochi R, Crawford B.  Pixel value to dose conversion errors can reject acceptable IMRT plans.  International Journal Of Radiation Oncology Biology Physics.  2004. 60:S625.

Siochi R.  A variable depth recursion algorithm for leaf sequence optimization.  Journal of Medical Physics.  2003. 30:1404.

Sontag M, Siochi R, Zhu Y, Samant S, Crawford B, Coffey D, Ying X, Merchant T.  Dosimetric significance of MLC leaf width reduction in the treatment of infratentorial ependymoma.  Journal of Medical Physics.  2003. 30:1398.

Potter L, Chang S, Cullip T, Siochi R.  A quality and efficiency analysis of the IMFAST segmentation algorithm in head and neck "step & shoot" IMRT treatments.  Journal of Medical Physics.  2002 March. 29(3):275-283.
[PubMed]

Azcona J, Siochi R, Azinovic I.  Quality assurance in IMRT: importance of the transmission through the jaws for an accurate calculation of absolute doses and relative distributions.  Journal of Medical Physics.  2002 March. 29(3):269-274.
[PubMed]

Siochi R.  An improved IMFAST algorithm.  Journal of Medical Physics.  2002. 29:1334.

Saw C, Siochi R, Ayyangar K, Zhen W, Enke C.  Leaf sequencing techniques for MLC-based IMRT.  Journal of Medical Dosimetry.  2001 July. 26(2):199-204.
[PubMed]

Siochi R.  Monitor Unit Scaling in IMRT.  Journal of Medical Physics.  2001. 28:1283.

Siochi R.  Problem directed optimization methods for radiation oncology physics.  Stefan Univ Pr.  2001. 

Siochi R.  Virtual micro-intensity modulated radiation therapy.  Journal of Medical Physics.  2000 November. 27(11):2480-2493.
[PubMed]

Siochi R.  Optimized decomposition of virtual micro intensity maps.  Proceedings of the 13th International Conference on the Use of Computers in Radiation Therapy. Heidelberg, Germany.  2000. 

Siochi R.  Simultaneous minimization of segments and junctions in virtual micro IMRT.  Proceedings of the 22nd Annual International Conference of the IEEE.  2000. 1:452-455.

Siochi R.  Minimizing static intensity modulation delivery time using an intensity solid paradigm.  International Journal of Radiation Oncology Biology Physics.  1999 February. 43(3):671-680.
[PubMed]

Siochi R.  A fluence correction method for intensity modulation.  Proceedings of the 38ieme Congres - Societe Francaise des Physiciens d'Hopital.  1999. 

Siochi R.  Accuracy and Time Considerations in Intensity Modulation Treatment Planning.  Journal of Medical Physics.  1999. 26:1086.

Siochi R.  Virtual Micro IMRT.  Journal of Medical Physics.  1999. 26:1096.

Siochi R.  Leaf Sequencing Optimization for Static IMRT.  Journal of Medical Physics.  1998. 25:A200.

Siochi R.  Requirements for manufacturer supplied data for Monte Carlo simulation: a BEAM perspective..  Proceedings of the Fifteenth International Conference on the Application of Accelerators in Research and Industry. Denton, TX.  1998. 

Siochi R, Elson H, Foster A, Lamba M.  A self-collimating convolution backprojection algorithm for optimizing dose distributions of I-125 prostate implants.  Journal of Medical Physics.  1997 February. 24(2):241-249.
[PubMed]

Siochi R.  A self-collimating convolution backprojection algorithm for brachytherapy optimization.  1995 February. 

Siochi R.  Optical characterization of processed gallium arsenide.  1990 December. 

Epp J, Dillard J, Siochi R, Zallen R, Sen S, Burton L.  Effects of ion bombardment on the chemical reactivity of GaAs(100): variation of bombarding ion mass.  Chemistry of Materials.  1990. 2:173.

Epp J, Dillard J, Siochi R, Zallen R, Cole E, Sen S, Vaseashta A, Burton L.  Characteristics of Si-Implanted (211) versus (100) GaAs.  Pittsburgh: Materials Research Society.  1989. 128:677.

Nixon E, Bayouth J, Siochi R, Shukla H.  Evaluation of CT extended field of view imaging impact on radiation therapy treatment planning.  Journal of Applied Clinical Medical Physics. 

Bylund K, Bayouth J, Smith M, Siochi R, Buatti J.  Geometric and dosimetric impact of interfraction prostate motion measured with megavoltage cone beam CT. 

Bayouth J, Bhatia S, Smith M, Jacobson G, Yao M, Siochi R, Pennington E, Waldron T, Modrick J, Pelland D, Anderson K, Chesnut D, Bylund K, Buatti J.  Indication for Daily Image Guidance in Radiation Therapy Observed Using Megavoltage Cone Beam Computed Tomography.  International Journal of Radiation Oncology Biology Physics. 

Huang Y, Flynn R, Siochi R, Bayouth J.  Prediction of Delivery Time and determination of dose rate and Gating Window for Gated treatment..  Professional Radiation Oncology Services. 

Siochi R, Balter P, Bloch C, Blodgett K, Curran B, Engelsman M, Feng W, Mechalakos J, Pavord D, Santanam L, Simon T, Sutlief S, Zhu X.  Report of the American Association of Physicists in Medicine Task Group 201: Recommendations for the QA of External Beam Radiotherapy Data Transfer.  Journal of Medical Physics. 

Siochi R, Kim Y, Bhatia S.  Tumor Control Probability Reduction in Phase Gated RT Treatments of Non-Small-Cell Lung Cancer Tumors with Motion in Excess of Planned Motion..  Journal of Applied Clinical Medical Physics, Physics in Medicine and Biology. 

Bayouth J, Bylund K, Siochi R, Schukla H, Nixon E, Buatti J.  Validation of treatment planning and delivery in conventional linear accelerator without flattening filter.  International Journal of Radiation Onology Biology Physics. 

Date Last Modified: 09/11/2013 - 13:55:24