1
|
Barman HA, Avci BK, Karadag B, Ikitimur B, Durmaz E, Deniz MF, Atici A, Ongen Z. Non-dominant right coronary artery (RCA) is associated with suspected inferior ischemia on SPECT in patients without significant coronary artery disease (CAD). THE INTERNATIONAL JOURNAL OF CARDIOVASCULAR IMAGING 2023; 39:1307-1312. [PMID: 37145188 DOI: 10.1007/s10554-023-02846-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 03/22/2023] [Indexed: 05/06/2023]
Abstract
OBJECTIVE There is a huge uncertainty in the medical community regarding the significance of non-dominant right coronary artery (RCA) in patients with inferior wall ischemia on myocardial perfusion single-photon emission computed tomography (SPECT). The purpose of this study is to determine the effect of non-dominant RCA on myocardial perfusion SPECT (MPS) with respect to the misleading detection of ischemia in the inferior wall of the myocardium. METHODS This is a retrospective study of 155 patients, who had undergone elective coronary angiography owing to an indication of inferior wall ischemia by MPS between 2012 and 2017. Patients were divided into two groups based on the coronary dominance: group 1 (n = 107), if RCA is the dominant artery, and group 2 (n = 48), if there are dominance of left artery and codominance of both arteries. Obstructive CAD was diagnosed in the case of stenosis that had severity greater than 50%. The positive predictive value (PPV), which was calculated as per the correlation between the inferior wall ischemia in MPS and obstruction level in RCA, was compared in both groups. RESULTS Majority of patients were male (109, 70%) and the mean age was 59.5 ± 10.2. There were 45 patients with obstructive RCA disease (PPV: 42%) among 107 patients in group 1, whereas there were only 8 patients with obstructive coronary artery disease (CAD) in RCA among 48 patients in group 2, (PPV: 16% and p = 0.004). CONCLUSIONS The results demonstrated that non-dominant RCA is associated with false-positive detection of inferior wall ischemia via MPS.
Collapse
Affiliation(s)
- Hasan Ali Barman
- Institute of Cardiology, Department of Cardiology, Istanbul University, Cerrahpasa, Istanbul, Turkey.
| | - Burcak Kilickiran Avci
- Cerrahpasa School of Medicine, Department of Cardiology, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Bilgehan Karadag
- Cerrahpasa School of Medicine, Department of Cardiology, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Baris Ikitimur
- Cerrahpasa School of Medicine, Department of Cardiology, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Eser Durmaz
- Cerrahpasa School of Medicine, Department of Cardiology, Istanbul University - Cerrahpasa, Istanbul, Turkey
| | - Muhammed Furkan Deniz
- Institute of Cardiology, Department of Cardiology, Istanbul University, Cerrahpasa, Istanbul, Turkey
| | - Adem Atici
- Faculty of Medicine, Department of Cardiology, Istanbul Medeniyet University, Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Zeki Ongen
- Cerrahpasa School of Medicine, Department of Cardiology, Istanbul University - Cerrahpasa, Istanbul, Turkey
| |
Collapse
|
2
|
Bonnefoy PB, Janvier L, Arede C, Drouet C, Harami D, Marque S, Ahond-Vionnet R. Reduced acquisition time for thallium myocardial perfusion imaging with large field cadmium-zinc-telluride SPECT/CT cameras: An equivalence study. J Nucl Cardiol 2022; 29:1933-1941. [PMID: 33890184 DOI: 10.1007/s12350-021-02611-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 03/03/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Cadmium-zinc-telluride (CZT) SPECT/CT cameras with large field of view offer a higher sensitivity than conventional Anger cameras. This prospective study aimed to determine the equivalence between a conventional protocol and a reduced acquisition time protocol for 201-Thallium myocardial perfusion imaging (MPI) using a whole-body CZT SPECT camera. METHODS AND RESULTS Stress MPI was obtained for 103 consecutive patients on a DISCOVERY-CZT camera. Images were anonymized and post-processed to simulate a 25% (D75 dataset) and 50% (D50 dataset) decrease in total recorded counts. Concerning the number of segments displaying a tracer uptake < 70% of maximum intensity per patient, equivalence was demonstrated for both count-reduced datasets with a good inter-observer agreement (between 0.90 and 0.88). When comparing the full-vs-D75 datasets and full-vs-D50 datasets, mean difference was 0.06 segment (CI95: [- 0.15;0.27], P < 0.001) and 0.518 segment (CI95: [0.28;0.76], P < 0.001) respectively. Inter-observer agreement was also moderate to good concerning the number of pathological segments (between 0.6 and 0.7) and excellent for functional parameters. CONCLUSION Whole-body CZT SPECT/CT cameras allow to reduce 201-Thallium MPI injected activity or acquisition time by 50% with an equivalence in the number of segments displaying a tracer uptake < 70% of maximum intensity and with a good inter-observer agreement.
Collapse
Affiliation(s)
- P B Bonnefoy
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France.
- Service de Médecine Nucléaire, CHU Saint-Etienne - Hôpital Nord, Saint Etienne, France.
- Service de Médecine Nucléaire, CHU de Saint-Etienne, 42055, Saint-Étienne, France.
| | - L Janvier
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France
| | - C Arede
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France
| | - C Drouet
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France
- Service de Médecine Nucléaire, Centre Georges-François Leclerc, Dijon, France
| | - D Harami
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France
| | - S Marque
- Société CAPIONIS, Bordeaux, France
| | - R Ahond-Vionnet
- Service de Médecine Nucléaire, Hôpital Pierre Bérégovoy, Nevers, France
| |
Collapse
|
3
|
Apert A, Canu M, Jankowski A, Riou L, Broisat A, Charlon C, Augier C, Boignard A, Leenhardt J, Salvat M, Casset C, Maurin M, Saunier C, Vanzetto G, Fagret D, Ghezzi C, Djaileb L, Barone-Rochette G. Comparison of Cadmium Zinc Telluride ECG-gated SPECT equilibrium radionuclide angiocardiography to magnetic resonance imaging to measure right ventricular volumes and ejection fraction in patients with cardiomyopathy. J Nucl Cardiol 2022; 29:1647-1656. [PMID: 33988809 DOI: 10.1007/s12350-021-02653-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 04/13/2021] [Indexed: 11/26/2022]
Abstract
AIMS The objective of this study was to determine the accuracy of right ventricular function (RVF) assessed by Cadmium Zinc Telluride ECG-gated SPECT equilibrium radionuclide angiocardiography (CZT-ERNA). METHODS AND RESULTS Twenty-one consecutive patients with cardiomyopathy (aged 54 ± 19 years; 62% male) were included. RV ejection fraction (EF) and volumes were analyzed by CZT-ERNA and compared with values obtained by cardiac magnetic resonance imaging (CMR). Mean values were not different between CZT-ERNA and MRI for RVEF (48.1 ± 10.4% vs 50.8 ± 10.0%; P = .23). Significant correlations (P < .0001) were observed between CZT-ERNA and MRI for RVEF, RV end-diastolic volume, and end-systolic volume (r = 0.81, r = 0.93, and r = 0.96, respectively). Bland-Altman analysis showed a mean difference (bias) between CZT-ERNA and MRI for RVEF of -2.69% (95% CI - 5.35 to - 0.42) with good agreement between the 2 techniques (limits of agreement, -14.3 to 8.99). Intraobserver and interobserver reproducibility of RVF measured by CZT-ERNA was high. CONCLUSION CZT-ERNA provides accurate, reproducible assessment of RVF and appears as a good alternative to cardiac magnetic resonance for the evaluation of the magnitude of RVF in patients with cardiomyopathy.
Collapse
Affiliation(s)
- Antoine Apert
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Marjorie Canu
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Adrien Jankowski
- Department of Radiology, University Hospital, Grenoble Alpes, France
| | - Laurent Riou
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
| | - Alexis Broisat
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
| | - Clemence Charlon
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Caroline Augier
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Aude Boignard
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Julien Leenhardt
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
- Department of Nuclear Medicine, University Hospital, Grenoble Alpes, France
| | - Muriel Salvat
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Charlotte Casset
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Marion Maurin
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Carole Saunier
- Department of Cardiology, University Hospital, Grenoble Alpes, France
| | - Gerald Vanzetto
- Department of Cardiology, University Hospital, Grenoble Alpes, France
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
- French Alliance Clinical Trial, French Clinical Research Infrastructure Network, Paris, France
| | - Daniel Fagret
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
- Department of Nuclear Medicine, University Hospital, Grenoble Alpes, France
| | - Catherine Ghezzi
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
| | - Loic Djaileb
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France
- Department of Nuclear Medicine, University Hospital, Grenoble Alpes, France
| | - Gilles Barone-Rochette
- Department of Cardiology, University Hospital, Grenoble Alpes, France.
- Univ. Grenoble Alpes, INSERM, CHU Grenoble Alpes, LRB, Grenoble, 38000, France.
- French Alliance Clinical Trial, French Clinical Research Infrastructure Network, Paris, France.
| |
Collapse
|
4
|
Queiroz CC, Machado MAD, Ximenes AAB, Pino AGS, Netto EM. Technical note: Partitioning of gated single photon emission computed tomography raw data for protocols optimization. J Appl Clin Med Phys 2021; 23:e13508. [PMID: 34918865 PMCID: PMC8906212 DOI: 10.1002/acm2.13508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 11/07/2021] [Accepted: 12/06/2021] [Indexed: 11/12/2022] Open
Abstract
PURPOSE Methodologies for optimization of SPECT image acquisition can be challenging due to imaging throughput, physiological bias, and patient comfort constraints. We evaluated a vendor-independent method for simulating lower count image acquisitions. METHODS We developed an algorithm that recombines the ECG-gated raw data into reduced counting acquisitions. We then tested the algorithm to simulate reduction of counting statistics from phantom SPECT image acquisition, which was synchronized with an ECG simulator. The datasets were reconstructed with a resolution recovery algorithm and the summed stress score (SSS) was assessed by three readers (two experts and one automatic). RESULTS The algorithm generated varying counting levels, simulating multiple examinations at the same time. The error between the expected and the simulated countings ranged from approximately 5% to 10% for the ungated simulations and 0% for the gated simulations. CONCLUSIONS The vendor-independent algorithm successfully generated lower counting statistics datasets from single-gated SPECT raw data. This method can be readily implemented for optimal SPECT research aiming to lower the injected activity and/ or to shorten the acquisition time.
Collapse
Affiliation(s)
- Cleiton Cavalcante Queiroz
- Department of Nuclear Medicine, São Rafael Hospital/ Rede D'or, Salvador, Bahia, Brazil.,Department of Nuclear Medicine, Cardio Pulmonar Hospital/ Rede D'or, Salvador, Bahia, Brazil.,Department of Nuclear Medicine, Hospital Universitario Professor Alberto Antunes/Ebserh, Maceio, Alagoas, Brazil
| | - Marcos Antonio Dorea Machado
- Department of Nuclear Medicine, São Rafael Hospital/ Rede D'or, Salvador, Bahia, Brazil.,Department of Nuclear Medicine, Cardio Pulmonar Hospital/ Rede D'or, Salvador, Bahia, Brazil.,Department of Health Technology Evaluation, Complexo Hospitalar Universitário Prof. Edgard Santos/Ebserh, Salvador, Bahia, Brazil
| | | | - Andre Gustavo Silva Pino
- Department of Nuclear Medicine, Hospital Universitario Professor Alberto Antunes/Ebserh, Maceio, Alagoas, Brazil
| | - Eduardo Martins Netto
- Infectious Disease Research Laboratory, Complexo Hospitalar Universitário Prof. Edgard Santos/Ebserh, Universidade Federal da Bahia, Salvador, Bahia, Brazil
| |
Collapse
|
5
|
Zoccarato O, Matheoud R, Lecchi M, Scabbio C, Claudio M, Brambilla M. Optimal 99mTc activity ratio in the single-day stress-rest myocardial perfusion imaging protocol: A multi-SPECT phantom study. J Nucl Cardiol 2021; 28:338-349. [PMID: 32720060 PMCID: PMC7384561 DOI: 10.1007/s12350-020-02290-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/09/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND This investigation used image data generated by an anthropomorphic phantom to determine the minimal 99mTc rest-stress activity concentration ratio (R) able to minimize the ghosting effect in the single-day stress-first myocardial perfusion imaging, using different positions of the perfusion defect (PD), scanners and reconstruction protocols. METHODS A cardiac phantom with a simulated PD was imaged under different R using different gamma cameras and reconstruction algorithms. The residual activity from precedent stress administration was simulated by modeling effective half-times in each compartment of the phantom and assuming a delay of 3 hours between the stress and rest studies. The net contrast (NC) of the PD in the rest study was assessed for different R, PD positions and scanner/software combinations. The optimal R will be the one that minimize the NC in the rest images RESULTS: The activity concentration ratio R, the position of the PD and the scanner/software combinations were all main effects with a statistically significant impact on the NC, in decreasing order of relevance. The NC diminished significantly only for R values up to 2. No further improvement was observed for NC for R values above 2 and up to 3. NC was significantly higher in anteroseptal than in posterolateral positions of the PD and higher for solid-state cameras. CONCLUSIONS A rest-stress activity concentration ratio R of 2 in single-day stress-first myocardial perfusion imaging is enough to achieve the maximum net contrast in the PD. This ratio should be used to optimize patient's radiation exposure.
Collapse
Affiliation(s)
- Orazio Zoccarato
- Department of Nuclear Medicine, S. Maugeri Foundation, IRCCS, Scientific Institute of Veruno (NO), Veruno, Italy
| | - Roberta Matheoud
- Department of Medical Physics, University Hospital ‘Maggiore della Carità’, Novara, Italy
| | - Michela Lecchi
- Health Physics Unit, ASST Santi Paolo e Carlo, Milan, Italy
| | | | - Marcassa Claudio
- Department of Cardiology, S. Maugeri Foundation, IRCCS, Scientific Institute of Veruno (NO), Veruno, Italy
| | - Marco Brambilla
- Department of Medical Physics, University Hospital ‘Maggiore della Carità’, Novara, Italy
| |
Collapse
|
6
|
Phillips WT, Gorzell BC, Martinez RA, Salman UA, Cooper AW, Stocker DJ, Adams CC. Fewer-Angle SPECT/CT Blood Pool Imaging for Infection and Inflammation. J Nucl Med Technol 2020; 49:39-43. [PMID: 33361187 DOI: 10.2967/jnmt.120.256933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 10/22/2020] [Indexed: 11/16/2022] Open
Abstract
A new protocol for rapid SPECT/CT blood pool imaging consisting of fewer image-angle acquisitions (fewer-angle SPECT/CT, or FASpecT/CT) was evaluated for localization of focal sites of soft-tissue inflammation, infection, and osteomyelitis. Methods: Immediately after dynamic flow and standard planar blood pool imaging with 99mTc-methylene diphosphonate, FASpecT/CT was performed with a dual-head γ-camera consisting of 6 steps over 360°, 12 total images with 30° of separation between angles, and 30 s per image, requiring a total imaging time of approximately 3 min. Images were reconstructed using iterative ordered-subset expectation maximization. Before use in a patient-care setting, various FASpecT/CT acquisition protocols were modeled using a phantom to determine the minimum number of stops and the stop duration required to produce a reliable image. Results: FASpecT/CT images provided excellent 3-dimensional localization of spine osteomyelitis, soft-tissue infection of the foot, and tendonitis of the hand and foot using a 3-min image acquisition time. The FASpecT/CT acquisition protocol required 1.3-3.5 min, including camera movement time. This was a reduction of 72%-90% from the time required for the standard 60-angle, 20-s SPECT/CT acquisition. Conclusion: The ability of FASpecT/CT blood pool images to help localize focal sites of hyperemia and inflammation can increase exam sensitivity and specificity. Additionally, using a FASpecT/CT protocol decreases imaging time by up to 90%.
Collapse
Affiliation(s)
- William T Phillips
- Department of Radiology, University of Texas Health Science Center, San Antonio, Texas.,Department of Radiology, University Hospital, San Antonio, Texas; and
| | - Brandon C Gorzell
- Department of Radiology, University of Texas Health Science Center, San Antonio, Texas
| | - Robert A Martinez
- Department of Radiology, University of Texas Health Science Center, San Antonio, Texas
| | - Umber A Salman
- Department of Radiology, University Hospital, San Antonio, Texas; and
| | - Albert W Cooper
- Department of Radiology, University of Texas Health Science Center, San Antonio, Texas
| | - Derek J Stocker
- Department of Radiology, Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Chad C Adams
- Department of Radiology, Walter Reed National Military Medical Center, Bethesda, Maryland
| |
Collapse
|
7
|
Rahman A, Zhu Y, Clarkson E, Kupinski MA, Frey EC, Jha AK. Fisher information analysis of list-mode SPECT emission data for joint estimation of activity and attenuation distribution. INVERSE PROBLEMS 2020; 36:084002. [PMID: 33071423 PMCID: PMC7561050 DOI: 10.1088/1361-6420/ab958b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The potential to perform attenuation and scatter compensation (ASC) in single-photon emission computed tomography (SPECT) imaging without a separate transmission scan is highly significant. In this context, attenuation in SPECT is primarily due to Compton scattering, where the probability of Compton scatter is proportional to the attenuation coefficient of the tissue and the energy of the scattered photon and the scattering angle are related. Based on this premise, we investigated whether the SPECT scattered-photon data acquired in list-mode (LM) format and including the energy information can be used to estimate the attenuation map. For this purpose, we propose a Fisher-information-based method that yields the Cramer-Rao bound (CRB) for the task of jointly estimating the activity and attenuation distribution using only the SPECT emission data. In the process, a path-based formalism to process the LM SPECT emission data, including the scattered-photon data, is proposed. The Fisher information method was implemented on NVIDIA graphics processing units (GPU) for acceleration. The method was applied to analyze the information content of SPECT LM emission data, which contains up to first-order scattered events, in a simulated SPECT system with parameters modeling a clinical system using realistic computational studies with 2-D digital synthetic and anthropomorphic phantoms. The method was also applied to LM data containing up to second-order scatter for a synthetic phantom. Experiments with anthropomorphic phantoms simulated myocardial perfusion and dopamine transporter (DaT)-Scan SPECT studies. The results show that the CRB obtained for the attenuation and activity coefficients was typically much lower than the true value of these coefficients. An increase in the number of detected photons yielded lower CRB for both the attenuation and activity coefficients. Further, we observed that systems with better energy resolution yielded a lower CRB for the attenuation coefficient. Overall, the results provide evidence that LM SPECT emission data, including the scattered photons, contains information to jointly estimate the activity and attenuation coefficients.
Collapse
Affiliation(s)
- Ashequr Rahman
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, USA
| | - Yansong Zhu
- Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, MD, USA
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA
- Department of Physics & Astronomy, University of British Columbia, Canada
| | - Eric Clarkson
- College of Optical Sciences, University of Arizona, Tucson AZ, USA
| | | | - Eric C Frey
- Department of Radiology and Radiological Sciences, Johns Hopkins University, Baltimore, MD, USA
| | - Abhinav K Jha
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, USA
| |
Collapse
|
8
|
Estimation of 47Sc and 177Lu production rates from their natural targets in Kyoto University Research Reactor. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07156-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
9
|
FASpecT/CT, A New SPECT/CT Acquisition With Higher Sensitivity and Efficiency in Radioiodine Thyroid Cancer Imaging. Clin Nucl Med 2020; 45:356-364. [PMID: 32149813 DOI: 10.1097/rlu.0000000000002978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE This article demonstrates the use of a new SPECT/CT acquisition protocol in patients with differentiated thyroid cancer (DTC). METHODS SPECT/CT scans (FASpecT/CT) with fewer angle acquisitions were retrospectively reviewed in 30 DTC patients treated with radioiodine at University Hospital, San Antonio, Tex, from July 2017 to March 2019. This FASpecT/CT of 12 versus 60 to 64 sampled views for convention SPECT was made possible by iterative reconstruction. RESULTS The FASpecT/CT protocol was judged to increase lesion detection in patients with low count rates. Furthermore, in patients with higher count rates, this technique reduced the acquisition time. FASpecT/CT patient images are shown as case examples in 4 of the 30 patients reviewed. CONCLUSIONS This FASpecT/CT acquisition in radioiodine-treated DTC offers the potential of higher sensitivity for metastatic lymph node detection in low count rates and a significant decrease in imaging time in high count rates. These advantages make SPECT/CT imaging more acceptable for patients who have difficulty with longer imaging times, to include the pediatric population.
Collapse
|
10
|
Slomka PJ, Miller RJ, Hu LH, Germano G, Berman DS. Solid-State Detector SPECT Myocardial Perfusion Imaging. J Nucl Med 2019; 60:1194-1204. [DOI: 10.2967/jnumed.118.220657] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 06/18/2019] [Indexed: 02/07/2023] Open
|
11
|
McDonald MA, Kirsch CF, Amin BY, Aulino JM, Bell AM, Cassidy RC, Chakraborty S, Choudhri AF, Gemme S, Lee RK, Luttrull MD, Metter DF, Moritani T, Reitman C, Shah LM, Sharma A, Shih RY, Snyder LA, Symko SC, Thiele R, Bykowski J. ACR Appropriateness Criteria® Cervical Neck Pain or Cervical Radiculopathy. J Am Coll Radiol 2019; 16:S57-S76. [DOI: 10.1016/j.jacr.2019.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 02/08/2019] [Indexed: 12/12/2022]
|
12
|
Abstract
Cardiac SPECT continues to play a critical role in detecting and managing cardiovascular disease, in particularly coronary artery disease (CAD) (Jaarsma et al 2012 J. Am. Coll. Cardiol. 59 1719-28), (Agostini et al 2016 Eur. J. Nucl. Med. Mol. Imaging 43 2423-32). While conventional dual-head SPECT scanners using parallel-hole collimators and scintillation crystals with photomultiplier tubes are still the workhorse of cardiac SPECT, they have the limitations of low photon sensitivity (~130 count s-1 MBq-1), poor image resolution (~15 mm) (Imbert et al 2012 J. Nucl. Med. 53 1897-903), relatively long acquisition time, inefficient use of the detector, high radiation dose, etc. Recently our field observed an exciting growth of new developments of dedicated cardiac scanners and collimators, as well as novel imaging algorithms for quantitative cardiac SPECT. These developments have opened doors to new applications with potential clinical impact, including ultra-low-dose imaging, absolute quantification of myocardial blood flow (MBF) and coronary flow reserve (CFR), multi-radionuclide imaging, and improved image quality as a result of attenuation, scatter, motion, and partial volume corrections (PVCs). In this article, we review the recent advances in cardiac SPECT instrumentation and imaging methods. This review mainly focuses on the most recent developments published since 2012 and points to the future of cardiac SPECT from an imaging physics perspective.
Collapse
Affiliation(s)
- Jing Wu
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, United States of America
| | | |
Collapse
|
13
|
Salvarese N, Carta D, Marzano C, Gerardi G, Melendez-Alafort L, Bolzati C. [99mTc][Tc(N)(DASD)(PNPn)]+ (DASD = 1,4-Dioxa-8-azaspiro[4,5]decandithiocarbamate, PNPn = Bisphosphinoamine) for Myocardial Imaging: Synthesis, Pharmacological and Pharmacokinetic Studies. J Med Chem 2018; 61:11114-11126. [DOI: 10.1021/acs.jmedchem.8b01191] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Nicola Salvarese
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE)-CNR, Corso Stati Uniti, 4, 35127 Padova, Italy
| | - Davide Carta
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo, 5, 35131 Padova, Italy
| | - Cristina Marzano
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Via Marzolo, 5, 35131 Padova, Italy
| | - Gabriele Gerardi
- Department of Veterinary Clinical Science, University of Padua, Viale dell’Università 16, 35020 Legnaro, Padua, Italy
| | | | - Cristina Bolzati
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE)-CNR, Corso Stati Uniti, 4, 35127 Padova, Italy
| |
Collapse
|
14
|
Roch P, Celier D, Dessaud C, Etard C. PATIENT EXPOSURE FROM NUCLEAR MEDICINE IN FRANCE: NATIONAL FOLLOW-UP AND INFLUENCE OF THE TECHNOLOGY THROUGH DIAGNOSTIC REFERENCE LEVELS DATA ANALYSIS. RADIATION PROTECTION DOSIMETRY 2018; 179:87-94. [PMID: 29040783 DOI: 10.1093/rpd/ncx213] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
The Nuclear Safety and Radiation Protection French Institute (IRSN) presents its latest assessment from up-to-date diagnostic reference levels (DRL) national data in nuclear medicine (NM). NM departments annually send data to IRSN to estimate the representativeness of current DRLs. Complementary analyses of the data have been performed to evaluate the influence of equipment evolution on practice and patient radiation exposure. Based on data from almost 90% of the French NM departments, some DRL update are proposed. The analysis of positron emission tomography data show that the more the time of flight technology is available on equipment, the lower is the administered activity to the patient. IRSN recommends updating DRL regulation with current and relevant examination data. The influence of technology evolution appeared to be positive for patient exposure and the results showed an obvious involvement of professionals in the radiation dose optimisation process.
Collapse
Affiliation(s)
- Patrice Roch
- Institut de Radioprotection et de Sûreté Nucléaire, 31 Avenue de la division Leclerc, 92260 Fontenay-aux-Roses, France
| | - David Celier
- Institut de Radioprotection et de Sûreté Nucléaire, 31 Avenue de la division Leclerc, 92260 Fontenay-aux-Roses, France
| | - Cécile Dessaud
- CERAP, 4 rue René Razel, Domaine Technologique de Saclay, 91400 Saclay, France
| | - Cécile Etard
- Institut de Radioprotection et de Sûreté Nucléaire, 31 Avenue de la division Leclerc, 92260 Fontenay-aux-Roses, France
| |
Collapse
|
15
|
van Dijk JD, Borren NM, Mouden M, van Dalen JA, Ottervanger JP, Jager PL. Effect of a patient-specific minimum activity in stress myocardial perfusion imaging using CZT-SPECT: Prognostic value, radiation dose, and scan outcome. J Nucl Cardiol 2018; 25:26-35. [PMID: 28822102 DOI: 10.1007/s12350-017-1011-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/31/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND SPECT Myocardial perfusion imaging (MPI) is associated with a relatively high radiation burden and decreasing image quality in heavy patients. Patient-specific low-activity protocols (PLAPs) are suggested but follow-up data is lacking. Our aim was to compare the use of a standard fixed-activity protocol (FAP) with a PLAP in cadmium zinc telluride (CZT)-SPECT MPI. METHODS We retrospectively included 1255 consecutive patients who underwent CZT-SPECT stress-optional rest MPI. 668 Patients were scanned using FAP (370 MBq) and 587 patients using PLAP (2.25 MBq·kg-1). Percentage of scans interpreted as normal, radiation dose, and 1-year follow-up including hard event rates (all-cause death or non-fatal myocardial infarction) were collected and compared. RESULTS The percentage of scans interpreted as normal was 67% in FAP and 70% in PLAP groups (P = .29). The annualized hard event rates in these patients were 1.0% in the FAP and 0.9% in the PLAP group (P = .86). However, the mean radiation dose decreased by 23% for stress-only and by 15% to 2.6 mSv for stress-optional rest MPI after introduction of the PLAP (p<0.001). CONCLUSIONS Introduction of a patient-specific low-activity protocol does not affect the percentage of scans interpreted as normal or prognosis but significantly lowers the radiation dose for CZT-SPECT MPI.
Collapse
Affiliation(s)
- J D van Dijk
- Department of Nuclear Medicine, Isala Hospital, PO Box 10400, 8000 GK, Zwolle, The Netherlands.
- MIRA: Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.
| | - N M Borren
- Department of Cardiology, Isala Hospital, Zwolle, The Netherlands
| | - M Mouden
- Department of Cardiology, Isala Hospital, Zwolle, The Netherlands
| | - J A van Dalen
- Department of Medical Physics, Isala Hospital, Zwolle, The Netherlands
| | - J P Ottervanger
- Department of Cardiology, Isala Hospital, Zwolle, The Netherlands
| | - P L Jager
- Department of Nuclear Medicine, Isala Hospital, PO Box 10400, 8000 GK, Zwolle, The Netherlands
| |
Collapse
|
16
|
Otsuka R, Kubo N, Miyazaki Y, Kawahara M, Takaesu J, Fukuchi K. Current status of stress myocardial perfusion imaging pharmaceuticals and radiation exposure in Japan: Results from a nationwide survey. J Nucl Cardiol 2017; 24:1850-1855. [PMID: 28353211 DOI: 10.1007/s12350-017-0867-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
Abstract
BACKGROUND Ionizing radiation generated during medical imaging procedures is a matter of concern. However, the current status of radiopharmaceutical use in stress myocardial perfusion imaging (MPI) and the radiation exposure from these radiopharmaceuticals is unknown in Japan. METHODS AND RESULTS A nationwide survey was conducted from June through July 2016. The questionnaires on the radiopharmaceuticals used and their administered doses during stress MPI were sent to 641 nuclear medicine facilities. The responses were collected from 431 facilities and the effective dose (ED) for an adult with standard body weight was calculated. Forty-three percent of the facilities used only 201TlCl, 35% used only 99mTc radiopharmaceuticals, and the remaining 22% used both. The two main reasons for using 201TlCl instead of 99mTc radiopharmaceuticals were "more familiarity with the usage of 201TlCl than 99mTc radiopharmaceuticals" and "apprehension about increasing the burden of physicians performing tracer injection twice." The mean ED was 14.0 ± 5.5 mSv (range, 3.9 to 25.2 mSv), which was higher than that reported in other countries. CONCLUSIONS The ED of stress MPI radiopharmaceuticals in Japan is probably higher than the world standard because more than 50% of the facilities still use 201TlCl. We recommend revising the routine stress MPI protocol to reduce the effects of ionizing radiation.
Collapse
Affiliation(s)
- Ryuto Otsuka
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Narumi Kubo
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yosuke Miyazaki
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Mio Kawahara
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Jun Takaesu
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuki Fukuchi
- Division of Medical Technology and Science, Department of Medical Physics and Engineering, Course of Health Science, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| |
Collapse
|
17
|
Nekolla SG, van Marwick S, Schachoff S, Kunze KP, Rischpler C. Cardiovascular PET/MRI: Technical Considerations and Outlook. CURRENT CARDIOVASCULAR IMAGING REPORTS 2017. [DOI: 10.1007/s12410-017-9435-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Slomka P, Germano G. Optimizing radiation dose and imaging time with conventional myocardial perfusion SPECT: Technical aspects. J Nucl Cardiol 2017; 24:888-891. [PMID: 26956877 PMCID: PMC5016212 DOI: 10.1007/s12350-016-0455-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 02/18/2016] [Indexed: 10/22/2022]
Affiliation(s)
- Piotr Slomka
- Department of Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA.
- David Geffen School of Medicine, UCLA, Los Angeles, CA, USA.
| | - Guido Germano
- Department of Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA, 90048, USA
- David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| |
Collapse
|
19
|
Holly TA. A world view of nuclear cardiology practices: Think globally, act locally. J Nucl Cardiol 2017; 24:860-861. [PMID: 26917419 DOI: 10.1007/s12350-016-0454-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 10/22/2022]
Affiliation(s)
- Thomas A Holly
- Northwestern University Feinberg School of Medicine, Chicago, USA.
| |
Collapse
|
20
|
Simanek M, Koranda P. SPECT/CT imaging in breast cancer - current status and challenges. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016; 160:474-483. [DOI: 10.5507/bp.2016.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 06/28/2016] [Indexed: 12/18/2022] Open
|
21
|
Myocardial perfusion scintigraphy dosimetry: optimal use of SPECT and SPECT/CT technologies in stress-first imaging protocol. Clin Transl Imaging 2016; 4:491-498. [PMID: 27933282 PMCID: PMC5118398 DOI: 10.1007/s40336-016-0212-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 10/20/2016] [Indexed: 01/11/2023]
Abstract
Purpose Over the past decade, nuclear medicine experts have been seeking to minimize patient exposure to radiation in myocardial perfusion scintigraphy (MPS). This review describes the latest technological innovations in MPS, particularly with regard to dose reduction. Methods We searched in PubMed for original clinical papers in English, published after 2008, using the following research criteria: (dose) and ((reduction) or (reducing)) and ((myocardial) or (cardiac) or (heart)) and ((nuclear medicine) or (nuclear imaging) or (radionuclide) or (scintigraphy) or (SPET) or (SPECT)). Thereafter, recent reviews on the topic were considered and other relevant clinical papers were added to the results. Results Of 202 non-duplicate articles, 17 were included. To these, another eight papers cited in recent reviews were added. By optimizing the features of software, i.e., through algorithms for iterative reconstruction with resolution recovery (IRRs), and hardware, i.e., scanners and collimators, and by preferring, unless otherwise indicated, the use of stress-first imaging protocols, it has become possible to reduce the effective dose by at least 50% in stress/rest protocols, and by up to 89% in patients undergoing a diagnostic stress-only study with new technology. With today’s SPECT/CT systems, the use of a stress-first protocol can conveniently be performed, resulting in an overall dose reduction of about 35% if two-thirds of stress-first examinations were considered definitively normal. Conclusion Using innovative gamma cameras, collimators and software, as well as, unless otherwise indicated, stress-first imaging protocols, it has become possible to reduce significantly the effective dose in a high percentage of patients, even when X-ray CT scanning is performed for attenuation correction.
Collapse
|
22
|
Denisova NV, Terekhov IN. A study of myocardial perfusion SPECT imaging with reduced radiation dose using maximum likelihood and entropy-based maximum
a posteriori
approaches. Biomed Phys Eng Express 2016. [DOI: 10.1088/2057-1976/2/5/055015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
23
|
Mandic L, Traxler D, Gugerell A, Zlabinger K, Lukovic D, Pavo N, Goliasch G, Spannbauer A, Winkler J, Gyöngyösi M. Molecular Imaging of Angiogenesis in Cardiac Regeneration. CURRENT CARDIOVASCULAR IMAGING REPORTS 2016; 9:27. [PMID: 27683600 PMCID: PMC5018257 DOI: 10.1007/s12410-016-9389-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW Myocardial infarction (MI) leading to heart failure displays an important cause of death worldwide. Adequate restoration of blood flow to prevent this transition is a crucial factor to improve long-term morbidity and mortality. Novel regenerative therapies have been thoroughly investigated within the past decades. RECENT FINDINGS Increased angiogenesis in infarcted myocardium has shown beneficial effects on the prognosis of MI; therefore, the proangiogenic capacity of currently tested treatments is of specific interest. Molecular imaging to visualize formation of new blood vessels in vivo displays a promising option to monitor proangiogenic effects of regenerative substances. SUMMARY Based on encouraging results in preclinical models, molecular angiogenesis imaging has recently been applied in a small set of patients. This article reviews recent literature on noninvasive in vivo molecular imaging of angiogenesis after MI as an integral part of cardiac regeneration.
Collapse
Affiliation(s)
- Ljubica Mandic
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Denise Traxler
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Alfred Gugerell
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Katrin Zlabinger
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Dominika Lukovic
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Noemi Pavo
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Georg Goliasch
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Andreas Spannbauer
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Johannes Winkler
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Mariann Gyöngyösi
- Department of Cardiology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna, Austria
| |
Collapse
|