Abstract
Non-invasive imaging of myocardial innervation using positron emission tomography (PET) and positron emission tomography/computed tomography (PET/CT) is a valuable methodology in cardiac imaging. Although it never entered the clinical arena in an extent as single-photon emission computed tomography (SPECT) imaging for this purpose did, its technical advantages, the excellent properties of the imaging agents, and the availability of tools for quantification combine into an occasionally underrated approach.
This chapter covers a rather wide range of topics and tries not to repeat information provided in other chapters of this book. Consequentially, the focus is to emphasize where all three elements – imaging technique, tracers, and analysis – have to interact to form a viable workflow.
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Notes
- 1.
The fact that the visual impression is so important comes quite obviously from the dominance of oncological imaging. The potential side effects of introducing changes in image quantification are not too widely investigated although effects on dynamic imaging and thus kinetic analysis exist.
- 2.
This trend has a name: “de-featuring” of a product.
- 3.
The development and production of new radiopharmaceuticals suffers from similar problems.
Abbreviations
- BGO:
-
Bismuth germanate
- COMT:
-
Catechol-O-methyltransferase
- CT:
-
Computed tomography
- ECG:
-
Electrocardiogram
- EPI:
-
Epinephrine
- GSO:
-
Gadolinium oxyorthosilicate
- H/M:
-
Heart–mediastinum ratio
- HTX:
-
Heart transplant surgery
- ID:
-
Injected dose
- LOR:
-
Line of response
- LSO:
-
Lutetium oxyorthosilicate
- LV:
-
Left ventricle
- LVEF:
-
Left ventricular ejection fraction
- MAO(−A):
-
Monoamine oxidase (−A)
- MR(I):
-
Magnetic resonance (imaging)
- NET:
-
Norepinephrine transporter
- PET:
-
Positron emission tomography
- PHEN:
-
Phenylephrine
- RCSD:
-
Regional cardiac sympathetic denervation
- ROI:
-
Region of interest
- SCA:
-
Sudden cardiac arrest
- SPECT:
-
Single-photon emission computed tomography
- SUV:
-
Standardized uptake value
- VOI:
-
Volume of interest
- VT:
-
Ventricular tachycardia
References
Allman KC, Wieland DM, Muzik O, Degrado TR, Wolfe ER Jr, Schwaiger M (1993) Carbon-11 hydroxyephedrine with positron emission tomography for serial assessment of cardiac adrenergic neuronal function after acute myocardial infarction in humans. J Am Coll Cardiol 22:368–375
Bassingthwaighte JB, Butterworth E, Jardine B, Raymond GM (2012) Compartmental modeling in the analysis of biological systems. Methods Mol Biol 929:391–438
Bengel FM, Ueberfuhr P, Nekolla S, Ziegler SI, Reichart B, Schwaiger M (1999) Oxidative metabolism of the transplanted human heart assessed by positron emission tomography using C-11 acetate. Am J Cardiol 83:1503–1505
Bengel FM, Ueberfuhr P, Ziegler SI, Nekolla SG, Odaka K, Reichart B, Schwaiger M (2000) Non-invasive assessment of the effect of cardiac sympathetic innervation on metabolism of the human heart. Eur J Nucl Med 27:1650–1657
Bengel FM, Ueberfuhr P, Schiepel N, Nekolla SG, Reichart B, Schwaiger M (2001) Effect of sympathetic reinnervation on cardiac performance after heart transplantation. N Engl J Med 345:731–738
Boucher L, Rodrigue S, Lecomte R, Benard F (2004) Respiratory gating for 3-dimensional PET of the thorax: feasibility and initial results. J Nucl Med 45:214–219
Brix G, Zaers J, Adam LE, Bellemann ME, Ostertag H, Trojan H, Haberkorn U, Doll J, Oberdorfer F, Lorenz WJ (1997) Performance evaluation of a whole-body PET scanner using the NEMA protocol. National Electrical Manufacturers Association. J Nucl Med 38:1614–1623
Brogsitter C, Gruning T, Weise R, Wielepp P, Lindner O, Korfer R, Burchert W (2005) 18F-FDG PET for detecting myocardial viability: validation of 3D data acquisition. J Nucl Med 46:19–24
Bundschuh RA, Martinez-Moeller A, Essler M, Martinez MJ, Nekolla SG, Ziegler SI, Schwaiger M (2007) Postacquisition detection of tumor motion in the lung and upper abdomen using list-mode PET data: a feasibility study. J Nucl Med 48:758–763
Bundschuh RA, Martinez-Moller A, Essler M, Nekolla SG, Ziegler SI, Schwaiger M (2008) Local motion correction for lung tumours in PET/CT–first results. Eur J Nucl Med Mol Imaging 35:1981–1988
Buther F, Dawood M, Stegger L, Wubbeling F, Schafers M, Schober O, Schafers KP (2009) List mode-driven cardiac and respiratory gating in PET. J Nucl Med 50:674–681
Buther F, Ernst I, Dawood M, Kraxner P, Schafers M, Schober O, Schafers KP (2010) Detection of respiratory tumour motion using intrinsic list mode-driven gating in positron emission tomography. Eur J Nucl Med Mol Imaging 37:2315–2327
Butterworth E, Jardine BE, Raymond GM, Neal ML, Bassingthwaighte JB (2013) JSim, an open-source modeling system for data analysis. F1000Res 2:288
Chen J, Garcia EV, Folks RD, Cooke CD, Faber TL, Tauxe EL, Iskandrian AE (2005) Onset of left ventricular mechanical contraction as determined by phase analysis of ECG-gated myocardial perfusion SPECT imaging: development of a diagnostic tool for assessment of cardiac mechanical dyssynchrony. J Nucl Cardiol 12:687–695
de Jong RM, Willemsen AT, Slart RH, Blanksma PK, van Waarde A, Cornel JH, Vaalburg W, van Veldhuisen DJ, Elsinga PH (2005) Myocardial beta-adrenoceptor downregulation in idiopathic dilated cardiomyopathy measured in vivo with PET using the new radioligand (S)-[11C]CGP12388. Eur J Nucl Med Mol Imaging 32:443–447
DeGrado TR, Hutchins GD, Toorongian SA, Wieland DM, Schwaiger M (1993) Myocardial kinetics of carbon-11-meta-hydroxyephedrine: retention mechanisms and effects of norepinephrine. J Nucl Med 34:1287–1293
Delforge J, Syrota A, Lancon JP, Nakajima K, Loc’h C, Janier M, Vallois JM, Cayla J, Crouzel C (1991) Cardiac beta-adrenergic receptor density measured in vivo using PET, CGP 12177, and a new graphical method. J Nucl Med 32:739–748
Delforge J, Mesangeau D, Dolle F, Merlet P, Loc’h C, Bottlaender M, Trebossen R, Syrota A (2002) In vivo quantification and parametric images of the cardiac beta-adrenergic receptor density. J Nucl Med 43:215–226
Delso G, Martinez-Moller A, Bundschuh RA, Nekolla SG, Ziegler SI, Schwaiger M (2011) Preliminary study of the detectability of coronary plaque with PET. Phys Med Biol 56:2145–2160
DiFilippo FP, Brunken RC (2005) Do implanted pacemaker leads and ICD leads cause metal-related artifact in cardiac PET/CT? J Nucl Med 46:436–443
Doze P, Elsinga PH, van Waarde A, Pieterman RM, Pruim J, Vaalburg W, Willemsen AT (2002) Quantification of beta-adrenoceptor density in the human heart with (S)-[11C]CGP 12388 and a tracer kinetic model. Eur J Nucl Med Mol Imaging 29:295–304
Fallavollita JA, Banas MD, Suzuki G, deKemp RA, Sajjad M, Canty JM Jr (2010) 11C-meta-hydroxyephedrine defects persist despite functional improvement in hibernating myocardium. J Nucl Cardiol 17:85–96
Fallavollita JA, Heavey BM, Luisi AJ Jr, Michalek SM, Baldwa S, Mashtare TL Jr, Hutson AD, Dekemp RA, Haka MS, Sajjad M, Cimato TR, Curtis AB, Cain ME, Canty JM Jr (2014) Regional myocardial sympathetic denervation predicts the risk of sudden cardiac arrest in ischemic cardiomyopathy. J Am Coll Cardiol 63:141–149
Gelfand MJ, Thomas SR (1987) Effective use of computers in nuclear medicine. McGraw-Hill, New York
Gigengack F, Ruthotto L, Burger M, Wolters CH, Jiang X, Schafers KP (2012) Motion correction in dual gated cardiac PET using mass-preserving image registration. IEEE Trans Med Imaging 31:698–712
Haas F, Augustin N, Holper K, Wottke M, Haehnel C, Nekolla S, Meisner H, Lange R, Schwaiger M (2000) Time course and extent of improvement of dysfunctioning myocardium in patients with coronary artery disease and severely depressed left ventricular function after revascularization: correlation with positron emission tomographic findings. J Am Coll Cardiol 36:1927–1934
Halpern BS, Dahlbom M, Quon A, Schiepers C, Waldherr C, Silverman DH, Ratib O, Czernin J (2004a) Impact of patient weight and emission scan duration on PET/CT image quality and lesion detectability. J Nucl Med 45:797–801
Halpern BS, Dahlbom M, Waldherr C, Yap CS, Schiepers C, Silverman DH, Ratib O, Czernin J (2004b) Cardiac pacemakers and central venous lines can induce focal artifacts on CT-corrected PET images. J Nucl Med 45:290–293
Harms HJ, de Haan S, Knaapen P, Allaart CP, Lammertsma AA, Lubberink M (2011) Parametric images of myocardial viability using a single 15O-H2O PET/CT scan. J Nucl Med 52:745–749
Higuchi T, Yousefi BH, Kaiser F, Gartner F, Rischpler C, Reder S, Yu M, Robinson S, Schwaiger M, Nekolla SG (2013) Assessment of the 18F-labeled PET tracer LMI1195 for imaging norepinephrine handling in rat hearts. J Nucl Med 54:1142–1146
Huang SC (2000) Anatomy of SUV. Standardized uptake value. Nucl Med Biol 27:643–646
Humm JL, Rosenfeld A, Del Guerra A (2003) From PET detectors to PET scanners. Eur J Nucl Med Mol Imaging 30:1574–1597
Ibrahim T, Nekolla SG, Schreiber K, Odaka K, Volz S, Mehilli J, Guthlin M, Delius W, Schwaiger M (2002) Assessment of coronary flow reserve: comparison between contrast-enhanced magnetic resonance imaging and positron emission tomography. J Am Coll Cardiol 39:864–870
Jacobson AF, Senior R, Cerqueira MD, Wong ND, Thomas GS, Lopez VA, Agostini D, Weiland F, Chandna H, Narula J, Investigators A-H (2010) Myocardial iodine-123 meta-iodobenzylguanidine imaging and cardiac events in heart failure. Results of the prospective ADMIRE-HF (AdreView Myocardial Imaging for Risk Evaluation in Heart Failure) study. J Am Coll Cardiol 55:2212–2221
Katoh C, Yoshinaga K, Klein R, Kasai K, Tomiyama Y, Manabe O, Naya M, Sakakibara M, Tsutsui H, deKemp RA, Tamaki N (2012) Quantification of regional myocardial blood flow estimation with three-dimensional dynamic rubidium-82 PET and modified spillover correction model. J Nucl Cardiol 19:763–774
Knesaurek K, Machac J, Krynyckyi BR, Almeida OD (2003) Comparison of 2-dimensional and 3-dimensional 82Rb myocardial perfusion PET imaging. J Nucl Med 44:1350–1356
Knesaurek K, Machac J, Ho Kim J (2007) Comparison of 2D, 3D high dose and 3D low dose gated myocardial 82Rb PET imaging. BMC Nucl Med 7:4
Koivumaki T, Vauhkonen M, Kuikka JT, Hakulinen MA (2012) Bioimpedance-based measurement method for simultaneous acquisition of respiratory and cardiac gating signals. Physiol Meas 33:1323–1334
Lartizien C, Kinahan PE, Comtat C (2004) A lesion detection observer study comparing 2-dimensional versus fully 3-dimensional whole-body PET imaging protocols. J Nucl Med 45:714–723
Lehner S, Uebleis C, Schussler F, Haug A, Kaab S, Bartenstein P, Van Kriekinge SD, Germano G, Estner H, Hacker M (2013) The amount of viable and dyssynchronous myocardium is associated with response to cardiac resynchronization therapy: initial clinical results using multiparametric ECG-gated [18F]FDG PET. Eur J Nucl Med Mol Imaging 40:1876–1883
Lekx KS, deKemp RA, Beanlands RS, Wisenberg G, Wells G, Stodilka RZ, Lortie M, Klein R, Zabel P, Kovacs MS, Sykes J, Prato FS (2010) 3D versus 2D dynamic 82Rb myocardial blood flow imaging in a canine model of stunned and infarcted myocardium. Nucl Med Commun 31:75–81
Lewellen TK (2008) Recent developments in PET detector technology. Phys Med Biol 53:R287–R317
Logan J (2000) Graphical analysis of PET data applied to reversible and irreversible tracers. Nucl Med Biol 27:661–670
Magota K, Hattori N, Manabe O, Naya M, Oyama-Manabe N, Shiga T, Kuge Y, Yamada S, Sakakibara M, Yoshinaga K, Tamaki N (2013) Electrocardiographically gated C-hydroxyephedrine PET for the simultaneous assessment of cardiac sympathetic and contractile functions. Ann Nucl Med 28:187–195
Makris NE, Huisman MC, Kinahan PE, Lammertsma AA, Boellaard R (2013) Evaluation of strategies towards harmonization of FDG PET/CT studies in multicentre trials: comparison of scanner validation phantoms and data analysis procedures. Eur J Nucl Med Mol Imaging 40:1507–1515
Marinelli M, Martinez-Moller A, Jensen B, Positano V, Weismuller S, Navab N, Landini L, Schwaiger M, Nekolla SG (2010) Registration of myocardial PET and SPECT for viability assessment using mutual information. Med Phys 37:2414–2424
Martinez MJ, Bercier Y, Schwaiger M, Ziegler SI (2006) PET/CT biograph sensation 16. Performance improvement using faster electronics. Nuklearmedizin 45:126–133
Martinez-Moller A, Souvatzoglou M, Navab N, Schwaiger M, Nekolla SG (2007a) Artifacts from misaligned CT in cardiac perfusion PET/CT studies: frequency, effects, and potential solutions. J Nucl Med 48:188–193
Martinez-Moller A, Zikic D, Botnar RM, Bundschuh RA, Howe W, Ziegler SI, Navab N, Schwaiger M, Nekolla SG (2007b) Dual cardiac-respiratory gated PET: implementation and results from a feasibility study. Eur J Nucl Med Mol Imaging 34:1447–1454
Merlet P, Delforge J, Syrota A, Angevin E, Maziere B, Crouzel C, Valette H, Loisance D, Castaigne A, Rande JL (1993) Positron emission tomography with 11C CGP-12177 to assess beta-adrenergic receptor concentration in idiopathic dilated cardiomyopathy. Circulation 87:1169–1178
Munch G, Nguyen NT, Nekolla S, Ziegler S, Muzik O, Chakraborty P, Wieland DM, Schwaiger M (2000) Evaluation of sympathetic nerve terminals with [(11)C]epinephrine and [(11)C]hydroxyephedrine and positron emission tomography. Circulation 101:516–523
Nakazato R, Dey D, Alexanderson E, Meave A, Jimenez M, Romero E, Jacome R, Pena M, Berman DS, Slomka PJ (2012) Automatic alignment of myocardial perfusion PET and 64-slice coronary CT angiography on hybrid PET/CT. J Nucl Cardiol 19:482–491
Naya M, Tsukamoto T, Morita K, Katoh C, Nishijima K, Komatsu H, Yamada S, Kuge Y, Tamaki N, Tsutsui H (2009) Myocardial beta-adrenergic receptor density assessed by 11C-CGP12177 PET predicts improvement of cardiac function after carvedilol treatment in patients with idiopathic dilated cardiomyopathy. J Nucl Med 50:220–225
Nekolla SG, Miethaner C, Nguyen N, Ziegler SI, Schwaiger M (1998) Reproducibility of polar map generation and assessment of defect severity and extent assessment in myocardial perfusion imaging using positron emission tomography. Eur J Nucl Med 25:1313–1321
Nesterov SV, Han C, Maki M, Kajander S, Naum AG, Helenius H, Lisinen I, Ukkonen H, Pietila M, Joutsiniemi E, Knuuti J (2009) Myocardial perfusion quantitation with 15O-labelled water PET: high reproducibility of the new cardiac analysis software (Carimas). Eur J Nucl Med Mol Imaging 36:1594–1602
Nguyen NT, DeGrado TR, Chakraborty P, Wieland DM, Schwaiger M (1997) Myocardial kinetics of carbon-11-epinephrine in the isolated working rat heart. J Nucl Med 38:780–785
Odaka K, von Scheidt W, Ziegler SI, Ueberfuhr P, Nekolla SG, Reichart B, Bengel FM, Schwaiger M (2001) Reappearance of cardiac presynaptic sympathetic nerve terminals in the transplanted heart: correlation between PET using (11)C-hydroxyephedrine and invasively measured norepinephrine release. J Nucl Med 42:1011–1016
Orlhac F, Soussan M, Maisonobe JA, Garcia CA, Vanderlinden B, Buvat I (2014) Tumor texture analysis in 18F-FDG PET: relationships between texture parameters, histogram indices, standardized uptake values, metabolic volumes, and total lesion glycolysis. J Nucl Med 55:414–422
Parodi O, Schelbert HR, Schwaiger M, Hansen H, Selin C, Hoffman EJ (1984) Cardiac emission computed-tomography – underestimation of regional tracer concentrations due to wall motion abnormalities. J Comput Assist Tomogr 8:1083–1092
Raffel DM, Corbett JR, del Rosario RB, Gildersleeve DL, Chiao PC, Schwaiger M, Wieland DM (1996) Clinical evaluation of carbon-11-phenylephrine: MAO-sensitive marker of cardiac sympathetic neurons. J Nucl Med 37:1923–1931
Raffel DM, Corbett JR, del Rosario RB, Mukhopadhyay SK, Gildersleeve DL, Rose P, Wieland DM (1999) Sensitivity of [11C]phenylephrine kinetics to monoamine oxidase activity in normal human heart. J Nucl Med 40:232–238
Raffel DM, Chen W, Jung YW, Jang KS, Gu G, Cozzi NV (2013a) Radiotracers for cardiac sympathetic innervation: transport kinetics and binding affinities for the human norepinephrine transporter. Nucl Med Biol 40:331–337
Raffel DM, Koeppe RA, Jung YW, Gu G, Jang KS, Sherman PS, Quesada CA (2013b) Quantification of cardiac sympathetic nerve density with N-11C-guanyl-meta-octopamine and tracer kinetic analysis. J Nucl Med 54:1645–1652
Raylman RR, Caraher JM, Hutchins GD (1993) Sampling requirements for dynamic cardiac PET studies using image-derived input functions. J Nucl Med 34:440–447
Rosenspire KC, Haka MS, Van Dort ME, Jewett DM, Gildersleeve DL, Schwaiger M, Wieland DM (1990) Synthesis and preliminary evaluation of carbon-11-meta-hydroxyephedrine: a false transmitter agent for heart neuronal imaging. J Nucl Med 31:1328–1334
Saraste A, Kajander S, Han C, Nesterov SV, Knuuti J (2012) PET: is myocardial flow quantification a clinical reality? J Nucl Cardiol 19:1044–1059
Sasano T, Abraham MR, Chang KC, Ashikaga H, Mills KJ, Holt DP, Hilton J, Nekolla SG, Dong J, Lardo AC, Halperin H, Dannals RF, Marban E, Bengel FM (2008) Abnormal sympathetic innervation of viable myocardium and the substrate of ventricular tachycardia after myocardial infarction. J Am Coll Cardiol 51:2266–2275
Schepis T, Gaemperli O, Treyer V, Valenta I, Burger C, Koepfli P, Namdar M, Adachi I, Alkadhi H, Kaufmann PA (2007) Absolute quantification of myocardial blood flow with 13N-ammonia and 3-dimensional PET. J Nucl Med 48:1783–1789
Schmidt KC, Turkheimer FE (2002) Kinetic modeling in positron emission tomography. Q J Nucl Med 46:70–85
Schwaiger M, Ziegler S, Nekolla SG (2005) PET/CT: challenge for nuclear cardiology. J Nucl Med 46:1664–1678
Slomka PJ, Baum RP (2009) Multimodality image registration with software: state-of-the-art. Eur J Nucl Med Mol Imaging 36(Suppl 1):S44–S55
Souvatzoglou M, Bengel F, Busch R, Kruschke C, Fernolendt H, Lee D, Schwaiger M, Nekolla SG (2007) Attenuation correction in cardiac PET/CT with three different CT protocols: a comparison with conventional PET. Eur J Nucl Med Mol Imaging 34:1991–2000
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 (2014) Absolute myocardial flow quantification with (82)Rb PET/CT: comparison of different software packages and methods. Eur J Nucl Med Mol Imaging 41:126–135
Thackeray JT, Bengel FM (2013) Assessment of cardiac autonomic neuronal function using PET imaging. J Nucl Cardiol 20:150–165
Thackeray JT, deKemp RA, Beanlands RS, DaSilva JN (2013) Insulin restores myocardial presynaptic sympathetic neuronal integrity in insulin-resistant diabetic rats. J Nucl Cardiol 20:845–856
Tipre DN, Goldstein DS (2005) Cardiac and extracardiac sympathetic denervation in Parkinson’s disease with orthostatic hypotension and in pure autonomic failure. J Nucl Med 46:1775–1781
Townsend DW, Cherry SR (2001) Combining anatomy and function: the path to true image fusion. Eur Radiol 11:1968–1974
van Elmpt W, Hamill J, Jones J, De Ruysscher D, Lambin P, Ollers M (2011) Optimal gating compared to 3D and 4D PET reconstruction for characterization of lung tumours. Eur J Nucl Med Mol Imaging 38:843–855
Visser EP, Boerman OC, Oyen WJ (2010) SUV: from silly useless value to smart uptake value. J Nucl Med 51:173–175
Wen L, Eberl S, Fulham M, Feng DD (2012) Recent software developments and applications in functional imaging. Curr Pharm Biotechnol 13:2166–2181
Willemsen AT, van den Hoff J (2002) Fundamentals of quantitative PET data analysis. Curr Pharm Des 8:1513–1526
Yalamanchili P, Wexler E, Hayes M, Yu M, Bozek J, Kagan M, Radeke HS, Azure M, Purohit A, Casebier DS, Robinson SP (2007) Mechanism of uptake and retention of F-18 BMS-747158-02 in cardiomyocytes: a novel PET myocardial imaging agent. J Nucl Cardiol 14:782–788
Yoshida K, Endo M, Fukuda H, Kagaya A, Himi T, Masuda Y, Inagaki Y, Iinuma T, Yamasaki T, Tateno Y (1995) Measurement of arterial tracer concentrations from cardiac PET images. J Comput Assist Tomogr 19:182–187
Yu M, Bozek J, Lamoy M, Guaraldi M, Silva P, Kagan M, Yalamanchili P, Onthank D, Mistry M, Lazewatsky J, Broekema M, Radeke H, Purohit A, Cdebaca M, Azure M, Cesati R, Casebier D, Robinson SP (2011) Evaluation of LMI1195, a novel 18F-labeled cardiac neuronal PET imaging agent, in cells and animal models. Circ Cardiovasc Imaging 4:435–443
Yu M, Bozek J, Lamoy M, Kagan M, Benites P, Onthank D, Robinson SP (2012) LMI1195 PET imaging in evaluation of regional cardiac sympathetic denervation and its potential role in antiarrhythmic drug treatment. Eur J Nucl Med Mol Imaging 39:1910–1919
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Nekolla, S.G., Rischpler, C. (2015). General Principles of PET/CT and Autonomic Innervation of the Heart Including Kinetics and Software. In: Slart, R., Tio, R., Elsinga, P., Schwaiger, M. (eds) Autonomic Innervation of the Heart. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-45074-1_8
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