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Contact Information

Ran Klein, PhD


Selected Publications

  1. Klein R, Ametepe ES, Yam Y, Dwivedi G, Chow BJ, Cardiac CT Assessment of Left-Ventricular Mass in Mid-Diastasis and its Prognostic Value, Eur Heart J Cardiovascular Imaging, [Online ahead of print]
    deKemp RA, Renaud JM, Klein R, Beanlands RS, Radionuclide tracers for myocardial perfusion imaging and blood flow quantification. Cardiol Clinics, 2016;34(1):37-46.
  2. Wells RG, Timmins R, Klein R, Lockwood J, Marvin B, deKemp RA, Wei L, Ruddy TD, Dynamic SPECT measurement of absolute myocardial blood flow in a porcine model, J Nucl Med, 2014;55(10):1685-91.
  3. Klein R, Hung G-U, Wu T-C, Li D, deKemp RA, Hsu B, Feasibility and Operator Variability of Myocardial Blood Flow and Reserve Measurements with 99mTc-Sestamibi Quantitative Dynamic SPECT-CT Imaging. J. Nucl. Cardiol., 2014;21(6):1075-88.
  4. Klein R, Beanlands RS, Wassenaar RW, Thorn S, Lamoureux M, DaSilva JN, Adler A, deKemp RA, Kinetic model based factor analysis of dynamic sequences of cardiac positron emission tomography. Med. Phys., 2010;37(8):3995-4010.
  5. Klein R, Adler A, Beanlands RS, deKemp RA, Precision-controlled elution of a 82Sr/82Rb generator for cardiac perfusion imaging with positron emission tomography. Phys. Med. Biol., 2007;52(3):659-673.

  1. Ohira H, Birnie DH, Pena E, Bernick J, Mc Ardle B, Leung E, Wells, GA, Yoshinaga K, Tsujino I, Sato T, Manabe O, Oyama-Manabe N, Nishimura M, Tamaki N, Dick A, Dennie C, Klein R, Renaud J, deKemp RA, Ruddy TD, Chow BJW, Davies R, Hessian R, Liu P, Beanlands RSB, Nery PB, Comparison of 18F-fluorodeoxyglucose positron emission tomography (FDG PET) and cardiac magnetic resonance (CMR) in corticosteroid-naive patients with conduction system disease due to cardiac sarcoidosis. EJNMMI 2016;43(2):259-69.
  2. Jones C, Klein R, Can PET be performed without an attenuation scan? J Nucl Cardiol, [Online ahead of print]
  3. Klein R, Editorial: Derivation of respiratory gating signals from ECG signals. J Nucl Cardiol, 2016;23(1):84-6.
  4. Ohira H, deKemp R, Pena E, Davies RA, Stewart DJ, Chandy G, Contreras-Dominguez V, Dennie C, Mc Ardle B, Klein R, Renaud J, DaSilva J, Pugliese C, Dunne R, Beanlands R, Mielniczuk LM, Shifts in myocardial fatty acid and glucose metabolism in pulmonary arterial hypertension: A potential mechanism for a maladaptive right ventricular response, Eur Heart J Cardiovascular Imaging, [Online ahead of print].
  5. Dunet V, Klein R, Allenbach G, Renaud J, deKemp RA, Prior JO, Myocardial blood flow quantification by Rb-82 cardiac PET/CT: A detailed reproducibility study between two semi-automatic analysis programs. J Nucl Cardiol. 2015 [Epub ahead of print]
  6. Arasaratnam P, Ayoub C, Klein R, deKemp R, Beanlands RS, Chow BJW, Positron Emission Tomography Myocardial Perfusion Imaging for Diagnosis and Risk Stratification in Obese Patients. Cur Cardiovascular Imag Rep, 2014;8:9304.
  7. Croteau E, Renaud JM, Archer C, Klein R, DaSilva JN, Ruddy TD, Beanlands RSB, deKemp RA, Beta2-adrenergic stress for in-vivo assessment of nitric-oxide-mediated coronary endothelial-dependent vasodilator function using micro-PET blood flow imaging in mice, Eur J Nucl Med Research, 2014;4(1):68
  8. Orton EJ, Al Harbi I, Klein R, Benalands RSB, deKemp RA, Wells, RG, Detection and severity classification of extra-cardiac interference in 82Rb PET myocardial perfusion imaging, Med Phys, 2014;41(10):102501.
  9. Nesterov SV, Deshayes E, Sciagrà R, Settimo L, Declerck JM, Pan XB, Yoshinaga K, Katoh C, Slomka PJ, Germano G, Han C, Aalto V, Alessio AM, Ficaro EP, Lee BC, Nekolla SG, Gwet KL, deKemp RA, Klein R, Dickson J, Case JA, Bateman T, Prior JO, Knuuti JM, Quantification of Myocardial Blood Flow in Absolute Terms Using 82Rb PET Imaging. Results of the RUBY-10 Study, J Am Coll Cardiol Img, 2014;7(11):1119-27.
  10. Chow BJ, Green RE, Coyle D, Laine M, Hanninen H, Leskinen H, Rajda M, Larose E, Hartikainen J, Hedman M, Mielniczuk L, O'Meara E, deKemp RA, Klein, R, Paterson I, White JA, Yla-Herttuala S, Leber A, Tandon V, Lee T, Al-Hesayen A, Hessian R, Dowsley T, Kass M, Kelly C, Garrard L, Tardif JC, Knuuti J, Beanlands RS, Wells GA, & IMAGE-HF Investigators, Computed tomographic coronary angiography for patients with heart failure (CTA-HF): A randomized controlled trial (IMAGE HF project 1-C). Trials, 2013;14:443.
  11. Chow BJW, Green RE, Coyle D, Laine M, Hanninen H, Leskinen H, Rajda M, Larose E, Hartikainen J, Hedman M, Mielniczuk L, O’Meara E, deKemp RA, Klein R, Paterson I, White JA, Yla-Herttuala S, Leber A, Tandon V, Lee T, Al-Hesayen A, Hessian R, Dowsley T, Kass M, Kelly C, Garrard L, Tardif JC, Knuuti J, Beanlands RS, Wells GA, Computed Tomographic Coronary Angiography for Patients with Heart Failure (CTA-HF): A Randomized Controlled Trial. (IMAGE HF Project 1-C), Trials 2013;14:443.
  12. Tahari AK, Lee A, Rajaram M, Fukushima K, Lodge MA, Lee BC, Ficaro EP, Nekolla S, Klein R, deKemp RA, Wahl RL, Bengel FM, Bravo PE, Absolute myocardial blood flow quantification with 82-Rb PET/CT: Comparison of different software packages and methods. Eur J of Nucl Med and Mol Imaging, 2014;41(1):126-135.
  13. McArdle BA, Birnie DH, Klein R, deKemp RA, Leung E, Renaud J, DaSilva J, Wells GA, Beanlands RS, Nery PB, Is There an Association Between Clinical Presentation and the Location and Extent of Myocardial Involvement of Cardiac Sarcoidosis as Assessed by 18F- Fluorodoexyglucose Positron Emission Tomography? Circ Cardiovasc Imagin., 2013;6(5):617-26.
  14. Thackeray JT, Renaud JM, Kordos M, Klein R, deKemp RA, Beanlands RS, DaSilva JN, Test-Retest repeatability of quantitative measurements of cardiac [11c]meta-hydroxyephedrine in rats by small animal positron emission tomography. Nuc. Med. Biol., 2013;40(5):676-681.
  15. Paterson I, Wells GA, Ezekowitz JA, White JA, Friedrich MG, Mielniczuk LM, O'Meara E, Chow B, deKemp RA, Klein R, Dennie C, Dick A, Coyle D, Dwivedi G, Rajda M, Wright GA, Laine M, Hanninen H, Larose E, Connelly K, Leung-Poi H, Howarth A, Davies RA, Duchesne L, Yla-Herttuala S, Saraste A, Farand P, Garrard L, Tardif J-C, Arnold M, Knuuti J, Beanlands R, Chan KL, Routine versus selective cardiac magnetic resonance in non-ischemic heart failure - OUTSMART-HF: study protocol for a randomized controlled trial (IMAGE-HF (heart failure) project 1-B). Trials, 2013;14:332.
  16. Thorn SL, deKemp R, Dumouchel T, Klein R, Renaud JM, Wells G, Gollob M, Beanlands RS, DaSilva JN, Repeatable Non-Invasive Imaging of FDG PET in the mouse myocardium: Evaluation of tracer kinetics in a Type 1 Diabetes model. J. Nucl. Med, 2013;54(9):1637-44.
  17. Pourmoghaddas A, Klein R, deKemp RA, Wells, RG, Respiratory phase alignment improves blood-flow quantification in Rb82 PET myocardial perfusion imaging. Med. Phys., 2013;40(2):022503.
  18. deKemp R, Declerck J, Klein R, Nakazato R, Pan X-B, Nakazato R, Tonge C, Aumugam P, Berman DS, Germano G, Beanlands RS, Slomka PJ, Multisoftware reproducibility study of stress and rest myocardial blood flow assessed with 3D dynamic PET/CT and a 1-tissue-compartment model of 82Rb kinetics. J. Nucl. Med. 2013;54(4):571-7.
  19. Dwivedi G, AlShehri H, deKemp RA, Ali I, Alghamdi AA, Klein R, Scullion A, Ruddy TD, Beanlands RS, Chow BJW, Scar Imaging using multislice computed tomography versus metabolic imaging by F-18 FDG positron emission tomography: A pilot study. Int. J. Cardiol., 2013;168(2):739-745.
  20. O'Meara E, Mielniczuk LM, Wells G, deKemp R, Klein R, Coyle D, McArdle B, Patterson I, White JA, Arnold M, Friedrich M, Larose E, Dick A, Chow B, Dennie C, Haddad H, Ruddy T, Ukkonen H, Wisenberg G, Cantin B, Pibarot P, Freeman M, Turcotte E, Connelly K, Clarke J, Williams K, Racine N, Garrard L, Tardif JC, DaSilva J, Knuuti J, Beanlands R, Alternative imaging modalities in ischemic heart failure (AIMI-HF): Study protocol for a randomized controlled trial. IMAGE HF Project I-A, Trials, 2013;14:218.
  21. Efseaff M, Klein R, Beanlands RSB, deKemp RA, Short-term repeatability of resting myocardial blood flow measurements using rubidium-82 PET imaging. J. Nucl. Cardiol., 2012:19(5);997-1006.
  22. Lamoureux M, Thorn S, Dumouchel T, Klein R, Renaud JM, Mason S, Lortie M, DaSilva JN, Beanlands RS, deKemp RA, Uniformity and repeatability of normal resting myocardial blood flow in rats with [13N]-ammonia and small animal PET. Nucl. Med. Commun., 2012;33:917-25.
  23. Katoh C, Yoshinaga K, Klein R, Kasai K, Manabe O, deKemp RA, Tamaki N, Quantification of Regional Myocardial Blood Flow Estimation with Three-dimensional Dynamic Rubidium-82 PET and modified spillover correction Model. J. Nucl. Cardiol., 2012;19:763-74.
  24. Yoshinaga K, Katoh C, Manabe O, Klein R, Naya M, Sakakibara M, Yamada S, deKemp RA, Tsutsui H, Tamaki N, Incremental diagnostic value of regional myocardial blood flow quantification over relative perfusion imaging with generator-produced rubidium-82 PET. Circ J., 2011;75(11):2628-34.
  25. Yoshinaga K, Manabe O, Katoh C, Chen L, Klein R, Naya M, deKemp RA, Williams K, Beanlands RSB, Tamaki N, Quantitative analysis of coronary endothelial function with generator-produced 82Rb PET: comparison with 15O-labelled water PET. Eur. J. Nucl. Med. Mol. Imaging, 2010;37(12):2233-41.
  26. Klein R, Beanlands RS, deKemp RA, Quantification of Myocardial Blood Flow and Flow Reserve - Technical Aspects. J. Nucl. Cardiol., 2010;17(4):555-570.
  27. Klein R, Renaud JM, Ziadi MC, Thorn SL, Adler A, Beanlands RS, deKemp RA, Intra- and inter-operator repeatability of myocardial blood flow and myocardial flow reserve measurements using Rubdium-82 PET and a highly automated analysis program. J. Nucl. Cardiol., 2010;17(4):600-616.
  28. Yoshinaga K, Klein R, Tamaki N, Generator Produced Rubidium-82 Positron Emission Tomography Myocardial Perfusion Imaging – From Basic Aspects to Clinical Applications. J. Of Cardiol., 2010;55(2):163-173.
  29. Lekx KS, deKemp RA, Beanlands RSB, Wisenberg G, Wells RG, Stodilka RZ, Lortie M, Klein R, Zabel P, Kovacs MS, Sykes J, Prato FS, Quantification of regional myocardial blood flow in a canine model of stunned and infarcted myocardium: comparison of rubidium-82 positron emission tomography with microspheres. Nucl. Med. Commun., 2010;31(1):67-74.
  30. Lekx KS, deKemp RA, Beanlands RSB, Wisenberg G, Wells G, Stodilka RZ, Lortie M, Klein R, Zabel P, Kovacs MS, Sykes J, Prato FS, 3D versus 2D dynamic 82Rb myocardial blood flow imaging in a canine model of stunned and infarcted myocardium. Nucl. Med. Commun., 2010;31(1):75-81.
  31. Lortie M, Beanlands RS, Yoshinaga K, Klein R, DaSilva JN, deKemp RA, Quantification of myocardial blood flow with 82Rb dynamic PET imaging. Eur. J. Nucl. Med. and Mol. Imaging., 2007;34(11):1765-74.