Tessa S Cook

Tessa S Cook

UNVERIFIED PROFILE

Are you Tessa S Cook?   Register this Author

Register author
Tessa S Cook

Tessa S Cook

Publications by authors named "Tessa S Cook"

Are you Tessa S Cook?   Register this Author

49Publications

178Reads

34Profile Views

Location, Location, Location: The Association Between Imaging Setting and Follow-Up of Findings of Indeterminate Malignant Potential.

J Am Coll Radiol 2019 Jun 17;16(6):781-787. Epub 2019 Jan 17.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Perelman School of Medicine, the University of Pennsylvania, Philadelphia, Pennsylvania; Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2018.11.010DOI Listing
June 2019

National Survey of Hospitalists' Experiences with Incidental Pulmonary Nodules.

J Hosp Med 2019 06 20;14(6):353-356. Epub 2019 Feb 20.

University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.12788/jhm.3115DOI Listing
June 2019

A Roadmap for Foundational Research on Artificial Intelligence in Medical Imaging: From the 2018 NIH/RSNA/ACR/The Academy Workshop.

Radiology 2019 Jun 16;291(3):781-791. Epub 2019 Apr 16.

From the Department of Radiology, Stanford University, Stanford, CA 94305 (C.P.L., M.P.L.); Department of Radiology, Grandview Medical Center, Birmingham, Ala (B.A.); Department of Radiology, Mayo Clinic, Rochester, Minn (B.J.E.); Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Mass (J.K.C.); GE Healthcare, Chicago, Ill (K.B.); Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pa (T.S.C., J.D.R.); Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pa (A.E.F.); Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY (D.S.M.); Biomedical Imaging Center, Rensselaer Polytechnic Institute, Troy, NY (G.W.); and National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Washington, DC (K.K.).

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1148/radiol.2019190613DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6542624PMC
June 2019

Readability of radiology reports: implications for patient-centered care.

Clin Imaging 2019 Mar - Apr;54:116-120. Epub 2018 Dec 28.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, United States of America; Institute for Biomedical Informatics, University of Pennsylvania, United States of America; Leonard Davis Institute of Health Economics, University of Pennsylvania, United States of America.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.clinimag.2018.12.006DOI Listing
May 2019

An Initiative to Reduce Unnecessary Gadolinium-Based Contrast in Multiple Sclerosis Patients.

J Am Coll Radiol 2019 May 16. Epub 2019 May 16.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address:

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2019.04.005DOI Listing
May 2019

Patient Factor Disparities in Imaging Follow-Up Rates After Incidental Abdominal Findings.

AJR Am J Roentgenol 2019 Mar 8;212(3):589-595. Epub 2019 Jan 8.

1 Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
https://www.ajronline.org/doi/10.2214/AJR.18.20083
Publisher Site
http://dx.doi.org/10.2214/AJR.18.20083DOI Listing
March 2019

Time to Talk: Can Radiologists Improve Follow-Up of Abdominal Imaging Findings Indeterminate for Malignancy by Initiating Verbal Communication?

J Am Coll Radiol 2018 Nov 19;15(11):1627-1632. Epub 2018 Mar 19.

Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2018.01.036DOI Listing
November 2018

Outcome of liver lesions indeterminate for malignancy on ultrasound: the role of patient age, risk status, and lesion echogenicity.

Abdom Radiol (NY) 2018 Nov;43(11):2970-2979

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, 1 Silverstein, Philadelphia, PA, 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00261-018-1571-7DOI Listing
November 2018

Large datasets, logistics, sharing and workflow in screening.

Authors:
Tessa S Cook

Br J Radiol 2018 Oct 29;91(1090):20170751. Epub 2018 Mar 29.

Perelman School of Medicine, University of Pennsylvania , Philadelphia, PA , USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1259/bjr.20170751DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6350485PMC
October 2018

Engaging Patients: Models for Patient- and Family-centered Care in Radiology.

Radiographics 2018 Oct;38(6):1866-1871

From the Department of Radiology and Imaging Sciences, Emory University, 1405 Clifton Rd NE, Atlanta, GA 30322 (N.K.); Leonard Davis Institute of Health Economics (H.M.Z.) and Perelman School of Medicine (H.M.Z., T.S.C.), University of Pennsylvania, Philadelphia, Pa; Department of Radiology, University of Pennsylvania, Philadelphia, Pa (H.M.Z., T.S.C.); Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Md (A.G.); the Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Medical Institutions, Baltimore, Md (D.J.D.); and Julian O. Salik Department of Radiology, LifeBridge Health System, Baltimore, Md (D.J.D.).

View Article

Download full-text PDF

Source
http://pubs.rsna.org/doi/10.1148/rg.2018180018
Publisher Site
http://dx.doi.org/10.1148/rg.2018180018DOI Listing
October 2018

Establishing and Running a Three-dimensional and Advanced Imaging Laboratory.

Radiographics 2018 Oct;38(6):1799-1809

From the Department of Radiology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce St, 1 Silverstein Radiology, Philadelphia, PA 19104 (T.S.C., W.W.B.); Hospital of the University of Pennsylvania, Philadelphia, Pa (S.J.S.); Siemens Healthineers, Cary, NC (S.R.S.); and Nuance Communications, Burlington, Mass (W.W.B.).

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1148/rg.2018180058DOI Listing
October 2018

Geographic Patterns of Radiology Referrals in the United States: A Descriptive Network Analysis.

J Am Coll Radiol 2018 Jun 2;15(6):827-833. Epub 2018 May 2.

Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Perelman School of Medicine, the University of Pennsylvania, Philadelphia, Pennsylvania; Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2018.03.007DOI Listing
June 2018

Improving Abnormality Detection on Chest Radiography Using Game-Like Reinforcement Mechanics.

Acad Radiol 2017 11 21;24(11):1428-1435. Epub 2017 Jun 21.

Hospital of the University of Pennsylvania, Department of Radiology, 3400 Spruce St, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2017.05.005DOI Listing
November 2017

Patients' Use and Evaluation of an Online System to Annotate Radiology Reports with Lay Language Definitions.

Acad Radiol 2017 09 19;24(9):1169-1174. Epub 2017 Apr 19.

Department of Radiology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104; Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, Pennsylvania; Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address:

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2017.03.005DOI Listing
September 2017

Now You See It, But Would You Later? Examining the Mechanisms of Satisfaction of Search in the Fatigued Radiologist.

Authors:
Tessa S Cook

Acad Radiol 2017 09 25;24(9):1055-1057. Epub 2017 Jul 25.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA; Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, PA. Electronic address:

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2017.06.004DOI Listing
September 2017

Attending Radiologist Variability and Its Effect on Radiology Resident Discrepancy Rates.

Acad Radiol 2017 06 24;24(6):694-699. Epub 2017 Jan 24.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2016.12.004DOI Listing
June 2017

Referring Provider Perceptions of Standardized Reporting for Possible Abdominal Cancer.

J Am Coll Radiol 2017 05 28;14(5):654-658.e3. Epub 2017 Jan 28.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address:

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2016.10.022DOI Listing
May 2017

Implementation of an Automated Radiology Recommendation-Tracking Engine for Abdominal Imaging Findings of Possible Cancer.

J Am Coll Radiol 2017 05 17;14(5):629-636. Epub 2017 Mar 17.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S15461440173012
Publisher Site
http://dx.doi.org/10.1016/j.jacr.2017.01.024DOI Listing
May 2017

Expanding the Scope of an Automated Radiology Recommendation-Tracking Engine: Initial Experiences and Lessons Learned.

J Digit Imaging 2017 04;30(2):156-162

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, 1 Silverstein Building, Philadelphia, PA, 19146, USA.

View Article

Download full-text PDF

Source
http://link.springer.com/10.1007/s10278-016-9912-y
Publisher Site
http://dx.doi.org/10.1007/s10278-016-9912-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5359201PMC
April 2017

Out of the Darkness and Into the Light: Patients, Referring Physicians, and Radiologists Working Toward Patient- and Family-Centered Care in Radiology.

J Am Coll Radiol 2017 04 22;14(4):569-572. Epub 2016 Nov 22.

Department of Radiology, University of Virginia, Charlottesville, Virginia.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2016.08.030DOI Listing
April 2017

Initial Effectiveness of a Monitoring System to Correctly Identify Inappropriate Lack of Follow-Up for Abdominal Imaging Findings of Possible Cancer.

J Am Coll Radiol 2016 Dec 28;13(12 Pt A):1505-1508.e2. Epub 2016 Aug 28.

Department of Radiology, Hospital of the University of Pennsylvania, and the Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address:

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S15461440163044
Publisher Site
http://dx.doi.org/10.1016/j.jacr.2016.06.016DOI Listing
December 2016

An Asynchronous Online Collaboration Between Radiologists and Patients: Harnessing the Power of Informatics to Design the Ideal Patient Portal.

J Am Coll Radiol 2016 Dec;13(12 Pt B):1599-1602

Department of Radiology and Imaging, Augusta University, Augusta, Georgia.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2016.09.040DOI Listing
December 2016

The Impact of Imaging Informatics Fellowships.

J Digit Imaging 2016 08;29(4):438-42

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10278-016-9862-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4942389PMC
August 2016

PORTER: a Prototype System for Patient-Oriented Radiology Reporting.

J Digit Imaging 2016 08;29(4):450-4

Department of Radiology, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce St., Philadelphia, PA, 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10278-016-9864-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4942390PMC
August 2016

Why Isn't There More High-fidelity Simulation Training in Diagnostic Radiology? Results of a Survey of Academic Radiologists.

Acad Radiol 2016 07 17;23(7):870-6. Epub 2016 May 17.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, 1 Silverstein Radiology, Philadelphia, PA 19104; Texas Neuroradiology, PA, Dallas, Texas.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2016.03.008DOI Listing
July 2016

App Review Series: RadioGraphics.

J Digit Imaging 2016 06;29(3):279-83

Radiology Department, Hospital of the University of Pennsylvania, 3400 Spruce St, Philadelphia, PA, 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10278-016-9863-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4879040PMC
June 2016

Comparison of diagnostic accuracy of plain film radiographs between original film and smartphone capture: a pilot study.

J Digit Imaging 2015 Dec;28(6):646-53

Department of Radiology, Hospital of University of Pennsylvania, 1 Silverstein Building, 3400 Spruce Street, Philadelphia, PA, 19104, USA.

View Article

Download full-text PDF

Source
http://link.springer.com/content/pdf/10.1007%2Fs10278-015-97
Web Search
http://link.springer.com/10.1007/s10278-015-9783-7
Publisher Site
http://dx.doi.org/10.1007/s10278-015-9783-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4636717PMC
December 2015

Milestones on a Shoestring: A Cost-Effective, Semi-automated Implementation of the New ACGME Requirements for Radiology.

Acad Radiol 2015 Oct 24;22(10):1287-93. Epub 2015 Apr 24.

Department of Radiology, Hospital of the University of Pennsylvania, University of Pennsylvania Health System, 3400 Spruce St, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2015.02.013DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4567954PMC
October 2015

Capricorn-A Web-Based Automatic Case Log and Volume Analytics for Diagnostic Radiology Residents.

Acad Radiol 2015 Oct 8;22(10):1242-51. Epub 2015 Aug 8.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2015.06.011DOI Listing
October 2015

Code Abdomen: An Assessment Coding Scheme for Abdominal Imaging Findings Possibly Representing Cancer.

J Am Coll Radiol 2015 Sep 27;12(9):947-50. Epub 2015 Jun 27.

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania; Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2015.04.005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4852851PMC
September 2015

Analysis of statistical biases in studies used to formulate guidelines: the case of arrhythmogenic right ventricular cardiomyopathy (ARVC) the case of ARVC.

Acad Radiol 2015 Aug 19;22(8):1010-5. Epub 2015 Jun 19.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St, 1 Silverstein, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2015.04.009DOI Listing
August 2015

Cardiac CT angiography in the emergency department.

AJR Am J Roentgenol 2015 Mar;204(3):463-74

1 Department of Radiology, University of Pennsylvania Medical Center, 3400 Spruce St, 1 Silverstein, Philadelphia, PA 19104.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.2214/AJR.14.12657DOI Listing
March 2015

Assessment of follow-up completeness and notification preferences for imaging findings of possible cancer: what happens after radiologists submit their reports?

Acad Radiol 2014 Dec 30;21(12):1579-86. Epub 2014 Aug 30.

Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2014.07.006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4825815PMC
December 2014

Business intelligence for the radiologist: making your data work for you.

J Am Coll Radiol 2014 Dec 1;11(12 Pt B):1238-40. Epub 2014 Dec 1.

Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, Maryland; Johns Hopkins Armstrong Institute for Patient Safety and Quality, Baltimore, Maryland.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2014.09.008DOI Listing
December 2014

Perspectives on radiation dose in abdominal imaging.

Abdom Imaging 2013 Dec;38(6):1190-6

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, 1 Silverstein, Philadelphia, PA, 19104, USA,

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00261-013-0028-2DOI Listing
December 2013

Using the Microsoft Kinect for patient size estimation and radiation dose normalization: proof of concept and initial validation.

J Digit Imaging 2013 Aug;26(4):657-62

Department of Radiology, Hospital of the University of Pennsylvania, 1 Silverstein, 3400 Spruce Street, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10278-012-9567-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705007PMC
August 2013

An interactive RADIANCE toolkit for customizable CT dose monitoring and reporting.

J Digit Imaging 2013 Aug;26(4):663-7

Department of Radiology, Hospital of the University of Pennsylvania, 1 Silverstein 3400 Spruce Street, Philadelphia, PA, 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10278-013-9570-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705013PMC
August 2013

Coronary and cardiac computed tomography in the emergency room: current status and future directions.

J Thorac Imaging 2013 Jul;28(4):204-16

Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/RTI.0b013e3182956bbfDOI Listing
July 2013

RADIANCE: An automated, enterprise-wide solution for archiving and reporting CT radiation dose estimates.

Radiographics 2011 Nov-Dec;31(7):1833-46. Epub 2011 Oct 3.

Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce St, 1 Silverstein, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://pubs.rsna.org/doi/10.1148/rg.317115048
Publisher Site
http://dx.doi.org/10.1148/rg.317115048DOI Listing
April 2012

Normal and variant anatomy of the shoulder on MRI.

Magn Reson Imaging Clin N Am 2011 Aug;19(3):581-94

Department of Radiology, Hospital of University of Pennsylvania, 3400 Spruce Street, 1 Silverstein, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.mric.2011.05.005DOI Listing
August 2011

Normal and variant anatomy of the wrist and hand on MR imaging.

Magn Reson Imaging Clin N Am 2011 Aug;19(3):595-608; ix

Department of Radiology, Hospital of University of Pennsylvania, 3400 Spruce Street, 1 Silverstein, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.mric.2011.05.007DOI Listing
August 2011

Normal and variant anatomy of the elbow on magnetic resonance imaging.

Magn Reson Imaging Clin N Am 2011 Aug;19(3):609-19

Department of Radiology, Hospital of University of Pennsylvania, 3400 Spruce Street, 1 Silverstein, Philadelphia, PA 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.mric.2011.05.002DOI Listing
August 2011

Pulmonary kinematics from image data: a review.

Acad Radiol 2011 Apr;18(4):402-17

Department of Radiology and Medical Imaging, University of Virginia, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.acra.2010.10.019DOI Listing
April 2011

Point set registration using Havrda-Charvat-Tsallis entropy measures.

IEEE Trans Med Imaging 2011 Feb 11;30(2):451-60. Epub 2010 Oct 11.

University of Virginia, Radiology, Charlottesville, VA 22903, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1109/TMI.2010.2086065DOI Listing
February 2011

Automated extraction of radiation dose information for CT examinations.

J Am Coll Radiol 2010 Nov;7(11):871-7

Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jacr.2010.06.026DOI Listing
November 2010

A new information-theoretic measure to control the robustness-sensitivity trade-off for DMFFD point-set registration.

Inf Process Med Imaging 2009 ;21:215-26

University of Pennsylvania, Penn Image Computing and Science Laboratory, USA.

View Article

Download full-text PDF

Source
http://www.cs.utah.edu/~suyash/pubs/registration_pointSet/po
Web Search
September 2009