1
|
Sweet C, Shmuel N, Shoaf JN, Stoecklein M, Muthukrishnan A, Stern E, Nguyen NC. A Pictorial Review of I-123 MIBG Imaging of Neuroblastoma Utilizing a State-of-the-Art CZT SPECT/CT System. Nucl Med Mol Imaging 2024; 58:1-8. [PMID: 38250182 PMCID: PMC10796310 DOI: 10.1007/s13139-023-00825-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 01/23/2024] Open
Abstract
The field of nuclear medicine is entering a new era of gamma-camera technology. Solid-state SPECT/CT systems will gradually replace the thallium-activated sodium-iodide NaI(Tl) systems. This digital technology allows drastic improvements in image quality, radiotracer dose reduction, and procedure efficiency. This pictorial review presents our initial experience on an NM/CT 870 CZT system (GE Healthcare), equipped with dual-head cadmium zinc telluride (CZT) detectors, for I-123 metaiodobenzylguanidine (MIBG) imaging in pediatric neuroblastoma. On planar imaging, CZT shows greater image quality than at conventional gamma-camera using the Infinia Hawkeye (GE Healthcare). Physiologic structures such as salivary glands and myocardium show sharper borders with a more notable signal-to-noise ratio at CZT than conventional gamma camera. On SPECT imaging, the CZT scanner, combined with resolution recovery, demonstrates either comparable or greater image quality at 80% of the conventional gamma camera’s acquisition time. Due to the 2.46-mm detector pixel with fully registered collimator holes matching each pixel and direct conversion of photons into electrical signals, the CZT gamma camera system provides significant advantages in photon localization and energy resolution.
Collapse
Affiliation(s)
- Cassidy Sweet
- Department of Radiology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA USA
| | | | - Jennifer N. Shoaf
- Department of Radiology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA USA
| | - Marcy Stoecklein
- Department of Radiology, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA USA
| | | | | | - Nghi C. Nguyen
- Department of Radiology, University of Texas, Southwestern Medical Center, Dallas, TX USA
| |
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
|
Yamane T, Takahashi M, Matsusaka Y, Fukushima K, Seto A, Kuji I, Matsunari I. Satisfied quantitative value can be acquired by short-time bone SPECT/CT using a whole-body cadmium-zinc-telluride gamma camera. Sci Rep 2021; 11:24320. [PMID: 34934145 PMCID: PMC8692318 DOI: 10.1038/s41598-021-03853-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 12/10/2021] [Indexed: 11/15/2022] Open
Abstract
The aim of this study was to evaluate the quantitative values of short-time scan (STS) of metastatic lesions compared with a standard scan (SS) when acquired by whole-body bone SPECT/CT with cadmium-zinc-telluride (CZT) detectors. We retrospectively reviewed 13 patients with bone metastases from prostate cancer, who underwent SPECT/CT performed on whole-body CZT gamma cameras. STSs were obtained using 75, 50, 25, 10, and 5% of the list-mode data for SS, respectively. Regions of interest (ROIs) were set on the increased uptake areas diagnosed as metastases. Intraclass correlation coefficients (ICCs) of standardized uptake values (SUVs) for the ROIs were calculated between the SS and each STS, and ICC ≥ 0.8 was set as a perfect correlation. Moreover, the repeatability coefficient (RC) was calculated, and RC ≤ 20% was defined as acceptable. A total of 152 metastatic lesions were included in the analysis. The ICCs between the SS vs. 75%-STS, 50%-STS, 25%-STS, 10%-STS, and 5%-STS were 0.999, 0.997, 0.994, 0.983, and 0.955, respectively. The RCs of the SS vs. 75%-STS, 50%-STS, 25%-STS, 10%-STS, and 5%-STS were 7.9, 12.4, 19.8, 30.8, and 41.3%, respectively. When evaluating the quality of CZT bone SPECT/CT acquired by a standard protocol, 25%-STS may provide adequate quantitative values.
Collapse
Affiliation(s)
- Tomohiko Yamane
- Division of Nuclear Medicine, Department of Radiology, Saitama Medical University Hospital, 38 Moro-Hongo, Moroyama, 350-0495, Japan.
- Department of Nuclear Medicine, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, 350-0491, Japan.
| | - Masafumi Takahashi
- Department of Central Radiological Technology, Saitama Medical University Hospital, 38 Moro-Hongo, Moroyama, 350-0495, Japan
| | - Yohji Matsusaka
- Department of Nuclear Medicine, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, 350-0491, Japan
| | - Kenji Fukushima
- Department of Nuclear Medicine, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, 350-0491, Japan
| | - Akira Seto
- Department of Nuclear Medicine, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, 350-0491, Japan
| | - Ichiei Kuji
- Department of Nuclear Medicine, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, 350-0491, Japan
| | - Ichiro Matsunari
- Division of Nuclear Medicine, Department of Radiology, Saitama Medical University Hospital, 38 Moro-Hongo, Moroyama, 350-0495, Japan
| |
Collapse
|
4
|
Shortened acquisition time in simultaneous 99mTc-tetrofosmin and 123I-β-methyl-p-iodophenyl pentadecanoic acid dual-tracer imaging with cadmium-zinc-telluride detectors in patients undergoing primary coronary intervention for acute myocardial infarction. Nucl Med Commun 2020; 40:1130-1137. [PMID: 31524763 DOI: 10.1097/mnm.0000000000001084] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE The use of cadmium-zinc-telluride-based scanners may increase the clinical feasibility of simultaneous dual-isotope imaging. In the current study, we sought to investigate a potential acquisition time in simultaneous Tc-tetrofosmin/I-β-methyl-p-iodophenyl pentadecanoic acid dual-isotope imaging using a Discovery NM/CT 670 cadmium-zinc-telluride. METHODS Simultaneous Tc-tetrofosmin/I-β-methyl-p-iodophenyl pentadecanoic acid dual-isotope imaging was performed in 29 patients who had undergone primary percutaneous coronary intervention for acute myocardial infarction. Referenced images with an acquisition time of 65 s/view (16.25 min) were reframed to produce images with acquisition times of 33, 16, and 8 s/view. The values for the quantitative-gated single-photon emission computed tomography (SPECT) and the quantitative perfusion SPECT were compared. RESULTS The quantitative-gated SPECT values for images with 33, 16, and 8 s/views showed good consistency with those for 65 s/view (the lower 95% confidence intervals for the intraclass correlation were ≥0.80). The quantitative perfusion SPECT values for Tc-tetrofosmin images with 33, 16, and 8 s/views also showed good consistency with those for 65 s/view; however, the quantitative perfusion SPECT values for I-β-methyl-p-iodophenyl pentadecanoic acid images with an acquisition time of 8 s/view were not consistent with the reference acquisition time of 65 s/view. CONCLUSIONS The quantitative-gated SPECT and quantitative perfusion SPECT values obtained from images with shorter acquisition times correlated with the values obtained from images with a reference acquisition time of 65 s/view; however, tracer-specific predisposition should be considered. These findings suggest that it is possible to reduce acquisition time when performing simultaneous Tc-tetrofosmin/I-β-methyl-p-iodophenyl pentadecanoic acid dual-tracer imaging with the novel cadmium-zinc-telluride scanner.
Collapse
|