Ryan Niederkohr, MD
Clinical Assistant Professor
Boston University School of Medicine
Dept of Radiology
Nuclear Medicine Section

MD, The Ohio State University



I earned my undergraduate degree from the University of Notre Dame and my Medical Degree from The Ohio State University (2003). I then completed my postgraduate nuclear medicine training at Stanford, where I had the opportunity to learn from world-renowned leaders and researchers in nuclear medicine and radiology. I joined Kaiser Permanente Santa Clara in 2008.

My medical interests lie in the domain of diagnostic imaging: specifically, the clinical applications of molecular imaging. My primary interest is PET/CT imaging, a powerful imaging tool which provides functional and anatomic data in a single exam. PET/CT has revolutionized the practice of oncology and will continue to do so as new molecular imaging agents become available. I love that my job involves antimatter and allows me to work with cutting-edge technology. I also enjoy working closely with my clinical colleagues in medical oncology, surgery, and radiation oncology to ensure that PET studies are performed and interpreted in a way that optimizes the care of our members with cancer.

As a nuclear medicine physician, I am also experienced in other aspects of nuclear imaging including SPECT/CT imaging, cardiovascular imaging (including cardiac stress testing and myocardial perfusion imaging) and therapeutic nuclear medicine including radioactive iodine treatment of thyroid disease (hyperthyroidism and thyroid cancer) and radioimmunotherapy for lymphoma. I am also trained and certified to perform and interpret cardiovascular CT/CTA.

I currently serve as Chief of the Department of Nuclear Medicine at Santa Clara.

I am proud to hold leadership roles in the Society of Nuclear Medicine and Molecular Imaging (SNMMI). I have been a Board Member of the SNMMI PET Center of Excellence since 2009 and have served as chairman of the SNMMI PET Quality and Reporting Taskforce since 2012. I have presented invited lectures on nuclear medicine and PET/CT at national and international conferences, have published multiple peer-reviewed journal articles, and serve as a reviewer for several medical journals.

Kaiser Permanente Santa Clara Medical Center


Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.

  1. Wright CL, Niederkohr RD, Knopp MU, Knopp MV. Online Social Media Practices in Nuclear Medicine and Molecular Imaging: A Concept to Incentivize Creation of Digital and Web-Based Content. J Nucl Med. 2017 Jun; 58(6):12N-14N. PMID: 28572291.
  2. Moghbel MC, Mittra E, Gallamini A, Niederkohr R, Chen DL, Zukotynski K, Nadel H, Kostakoglu L. Response Assessment Criteria and Their Applications in Lymphoma: Part 2. J Nucl Med. 2017 Jan; 58(1):13-22. PMID: 27879369; DOI: 10.2967/jnumed.116.184242;.
  3. Zukotynski K, Jadvar H, Hope T, Subramaniam RM, Van Loon K, Varma M, Niederkohr RD. SNMMI Comment on the 2016 Society of Surgical Oncology "Choosing Wisely" Recommendation on the Use of PET/CT in Colorectal Cancer. J Nucl Med. 2017 Jan; 58(1):11-12. PMID: 27688471; DOI: 10.2967/jnumed.116.182584;.
  4. Moghbel MC, Kostakoglu L, Zukotynski K, Chen DL, Nadel H, Niederkohr R, Mittra E. Response Assessment Criteria and Their Applications in Lymphoma: Part 1. J Nucl Med. 2016 Jun; 57(6):928-35. PMID: 27127227; DOI: 10.2967/jnumed.115.166280;.
  5. Olcott P, Pratx G, Johnson D, Mittra E, Niederkohr R, Levin CS. Clinical evaluation of a novel intraoperative handheld gamma camera for sentinel lymph node biopsy. Phys Med. 2014 May; 30(3):340-5. PMID: 24239343.
  6. Niederkohr RD, Chiu E, Katzel JA. 99mTc-oxidronate uptake within urothelial carcinoma confirmed with SPECT/CT imaging. Clin Nucl Med. 2013 Aug; 38(8):655-7. PMID: 23751825; DOI: 10.1097/RLU.0b013e3182952c18;.
  7. Niederkohr RD, Greenspan BS, Prior JO, Schöder H, Seltzer MA, Zukotynski KA, Rohren EM. Reporting guidance for oncologic 18F-FDG PET/CT imaging. J Nucl Med. 2013 May; 54(5):756-61. PMID: 23575994; DOI: 10.2967/jnumed.112.112177;.
  8. Niederkohr RD. Technical feasibility vs. clinical utility: a question of "can we?" vs. "should we?". Eur J Nucl Med Mol Imaging. 2012 Feb; 39(2):260-1. PMID: 22160199; DOI: 10.1007/s00259-011-2012-9;.
  9. Niederkohr RD, Levin LA. Author response: Bayesian estimation of sensitivity of temporal artery biopsies. Invest Ophthalmol Vis Sci. 2012 Feb 01; 53(2):586. PMID: 22298152.
  10. Schreck GA, Niederkohr RD. (153)Sm-EDTMP appears to accumulate only trivially within peritoneal ascites. J Nucl Med Technol. 2012 Mar; 40(1):50-1. PMID: 22235143; DOI: 10.2967/jnmt.111.097220;.
Showing 10 of 26 results. Show More

This graph shows the total number of publications by year, by first, middle/unknown, or last author.

Bar chart showing 26 publications over 10 distinct years, with a maximum of 8 publications in 2007

YearPublications
20051
20062
20078
20083
20091
20111
20123
20133
20163
20171
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700 Lawrence Expy, 1st Floor Dept 120
Santa Clara CA 95051
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